This document discusses implementing classes in Java, including:
- Defining the public interface of a class with constructors and methods
- Declaring and accessing instance fields within a class
- Writing documentation comments for the public interface
The document discusses exception handling in C# programs. It explains that exceptions are errors that occur during program execution. The C# try, catch, and finally keywords are used to handle exceptions. The try block contains code that might cause exceptions. The catch block handles specific exception types. The finally block contains cleanup code that always executes. Built-in exceptions like DivideByZeroException are part of the .NET Framework. Exception handling prevents program crashes and allows graceful handling of errors.
The document describes designing an online course reservation system using Rational Rose software. The system would allow students to register for courses, view course catalogs, and professors to sign up to teach courses and record grades. It would have four modules: student login, student registration, course registration, and course inquiry. The system was implemented using Visual Basic 6.0, with Access as the backend database. UML diagrams like use case, class, sequence, and deployment diagrams were created to model and design the system. The project was carried out sequentially and resulted in an efficient online course reservation system.
This document appears to be an assignment submission for a post graduate diploma in information technology. It contains 10 questions related to Java programming and the answers/code snippets provided for each question. The questions cover topics like simple interest calculation, sum of digits, Fibonacci series, converting decimal to Roman numerals, prime numbers, nested for loops to print patterns, recursive factorial, defining custom exceptions and creating a simple welcome applet.
The document contains descriptions of 83 Java programming problems involving topics such as calculating areas and perimeters of shapes, prime numbers, palindromes, Fibonacci series, arrays, strings, classes, objects, inheritance, polymorphism, interfaces, exception handling, file handling, and more. Many problems require reading input, processing data, and displaying output using concepts like classes, objects, methods, and exception handling.
This document discusses fundamentals of Java programming including why Java is an important language, how Java code is compiled and run, the structure of simple Java programs, and user interface styles. It provides examples of simple "Hello World" and temperature conversion programs, explaining key concepts like variables, objects, methods, and layout managers. The document is intended to help readers understand basic Java programming principles.
This document provides instructions for using WinCOM (Component Object Model) to export data from an Arduino motor controller application to an Excel spreadsheet. It discusses:
1) Using WinCOM to export data from the application to cells in an Excel spreadsheet by creating an Excel object and filling cells.
2) Controlling a DC motor with an Arduino board and sending motor data back to be exported to an Excel file.
3) Configuring COM port settings to communicate between the Arduino and computer for sending and receiving data.
This document provides an overview of key concepts from Lecture 2 of an object-oriented computing course, including:
1) It discusses the basic elements of class definitions such as fields, constructors, and methods. Constructors initialize an object's state while methods implement its behavior.
2) It explains how to define fields, constructors, and methods in a Java class. Constructors set up an object's initial state using fields, while methods can access or modify fields to get/set an object's properties.
3) It uses a ticket machine example to demonstrate class concepts like defining behaviors through methods, passing data via parameters, and distinguishing accessor methods that return data from mutator methods that set an object
This document summarizes methods of dynamic binary analysis and the Valgrind tool. It discusses how dynamic binary analysis tools like Valgrind use techniques like dynamic binary instrumentation and shadow memory to detect errors in programs as they execute. Valgrind's Memcheck tool tracks definedness of values at the bit level to detect errors like bad memory accesses and uses of uninitialized data with low false positive rates. The document also explains Valgrind's use of disassembly and re-synthesis to translate machine code to an intermediate representation for instrumentation.
The document discusses exception handling in C# programs. It explains that exceptions are errors that occur during program execution. The C# try, catch, and finally keywords are used to handle exceptions. The try block contains code that might cause exceptions. The catch block handles specific exception types. The finally block contains cleanup code that always executes. Built-in exceptions like DivideByZeroException are part of the .NET Framework. Exception handling prevents program crashes and allows graceful handling of errors.
The document describes designing an online course reservation system using Rational Rose software. The system would allow students to register for courses, view course catalogs, and professors to sign up to teach courses and record grades. It would have four modules: student login, student registration, course registration, and course inquiry. The system was implemented using Visual Basic 6.0, with Access as the backend database. UML diagrams like use case, class, sequence, and deployment diagrams were created to model and design the system. The project was carried out sequentially and resulted in an efficient online course reservation system.
This document appears to be an assignment submission for a post graduate diploma in information technology. It contains 10 questions related to Java programming and the answers/code snippets provided for each question. The questions cover topics like simple interest calculation, sum of digits, Fibonacci series, converting decimal to Roman numerals, prime numbers, nested for loops to print patterns, recursive factorial, defining custom exceptions and creating a simple welcome applet.
The document contains descriptions of 83 Java programming problems involving topics such as calculating areas and perimeters of shapes, prime numbers, palindromes, Fibonacci series, arrays, strings, classes, objects, inheritance, polymorphism, interfaces, exception handling, file handling, and more. Many problems require reading input, processing data, and displaying output using concepts like classes, objects, methods, and exception handling.
This document discusses fundamentals of Java programming including why Java is an important language, how Java code is compiled and run, the structure of simple Java programs, and user interface styles. It provides examples of simple "Hello World" and temperature conversion programs, explaining key concepts like variables, objects, methods, and layout managers. The document is intended to help readers understand basic Java programming principles.
This document provides instructions for using WinCOM (Component Object Model) to export data from an Arduino motor controller application to an Excel spreadsheet. It discusses:
1) Using WinCOM to export data from the application to cells in an Excel spreadsheet by creating an Excel object and filling cells.
2) Controlling a DC motor with an Arduino board and sending motor data back to be exported to an Excel file.
3) Configuring COM port settings to communicate between the Arduino and computer for sending and receiving data.
This document provides an overview of key concepts from Lecture 2 of an object-oriented computing course, including:
1) It discusses the basic elements of class definitions such as fields, constructors, and methods. Constructors initialize an object's state while methods implement its behavior.
2) It explains how to define fields, constructors, and methods in a Java class. Constructors set up an object's initial state using fields, while methods can access or modify fields to get/set an object's properties.
3) It uses a ticket machine example to demonstrate class concepts like defining behaviors through methods, passing data via parameters, and distinguishing accessor methods that return data from mutator methods that set an object
This document summarizes methods of dynamic binary analysis and the Valgrind tool. It discusses how dynamic binary analysis tools like Valgrind use techniques like dynamic binary instrumentation and shadow memory to detect errors in programs as they execute. Valgrind's Memcheck tool tracks definedness of values at the bit level to detect errors like bad memory accesses and uses of uninitialized data with low false positive rates. The document also explains Valgrind's use of disassembly and re-synthesis to translate machine code to an intermediate representation for instrumentation.
This document discusses HTML and Java applets. It introduces HTML tags for formatting text, lists, tables, and embedding images and links. It explains how to convert a Java application into an applet and embed it in an HTML page. Key differences between applets and applications are that applets cannot access local files and have constraints on their user interface.
The document provides an overview of fundamentals of Java, including:
- A brief history of computers from the 1940s to present day.
- How computer hardware and software work together, with hardware being the physical devices and software providing functionality.
- How data and programs are represented digitally using bits, bytes, binary, and other number systems.
- The components of computer hardware and types of computer software.
- The evolution of programming languages from machine language to modern high-level languages like Java.
- The software development life cycle and waterfall model for developing software projects.
- Key concepts of object-oriented programming like classes, objects, encapsulation, inheritance, and polymorphism.
The document discusses key concepts of object-oriented programming with Java including classes, objects, encapsulation, inheritance, and polymorphism. It defines a class as a blueprint for objects and notes that objects are instances of classes that contain attributes and methods. The document explains that encapsulation groups related data and methods into a class and hides implementation details. Inheritance and polymorphism allow classes to share and extend behaviors from other classes. Constructors, methods, and the 'this' keyword are also covered.
Diving in OOP (Day 4): Polymorphism and Inheritance (All About Abstract Class...Akhil Mittal
This document provides an overview of abstract classes in C# object-oriented programming. It defines abstract classes as classes that cannot be instantiated and must be implemented in derived classes. The document demonstrates several key features of abstract classes through code examples, including: defining abstract and non-abstract methods in abstract classes; inheriting from abstract classes to instantiate derived classes; and requiring derived classes to implement abstract methods from the base abstract class.
The document discusses sequence diagrams, which show the interaction between objects and classes through a sequence of messages. Sequence diagrams are useful during the design phase to help understand system design and object interactions. They can also be used to document how existing systems work by showing the sequence of messages exchanged between objects.
This document provides instructions and tutorials for a lab on Visual Basic and spreadsheet programming basics. The lab consists of three tutorials that students should complete during the lab session or on their own time. The tutorials cover topics like creating macros, recording macros, modules and procedures, objects and collections in VBA, and the Range and Cells objects. Students are expected to work through examples and tasks in each tutorial. Their understanding of the material will be assessed on an upcoming Excel exam.
Lecture12 software design class diagramShahid Riaz
The document describes the key elements of a UML class diagram including classes, attributes, operations, relationships, interfaces, exceptions, packages and provides examples of each. It explains that a class diagram models the structure and behavior of a system by showing classes and relationships. Key relationships include associations, generalizations, dependencies and aggregations/compositions. The diagram notation for each element is also defined.
Welcome to my series of articles on Unified Modeling Language. This is "Session 3 – Class Diagram" of the series.
Please view my other documents where I have covered each UML diagram with examples
This document provides an overview of the Unified Modeling Language (UML) and how it can be used to design software systems. It discusses what UML is, why we use UML, and the main types of UML diagrams including use case diagrams, class diagrams, sequence diagrams, collaboration diagrams, and state diagrams. It also briefly mentions some popular UML modeling tools. The document aims to introduce students to UML and illustrate how different diagram types can be applied at different stages of the software design process.
Unit 1 introduction to visual basic programmingAbha Damani
This document provides an introduction to visual basic programming, covering topics such as variables, data types, operators, flow control, procedures, arrays, strings, and exception handling. It discusses the visual studio integrated development environment and its key components. It defines variables and data types, and covers implicit and explicit type conversions. Control flow structures like conditional statements, selection statements, and iteration statements are explained. Procedures such as subroutines and functions are defined. Finally, it provides examples of arrays and strings.
This document contains instructions and questions for an exam in an object-oriented programming course. It includes an honor code statement, directions on the exam format and scoring, and conceptual and programming questions. The conceptual questions cover topics like static class members, encapsulation through composition, inheritance hierarchies, and relationships between classes like is-a and has-a. The programming questions involve iterating through and printing an array, implementing methods for a class that stores coordinate data, and scaling coordinate values.
This document introduces programming and the basics of computer architecture. It discusses what programming is, the anatomy of a computer including central processing units and memory, machine code, and high-level languages. It also covers Java as a programming language, becoming familiar with development environments, and writing a simple "Hello World" program in Java to demonstrate compiling and running a program. Errors like syntax errors and logic errors are introduced.
This document outlines the key concepts covered in Chapter 3 of an introduction to C# programming textbook. It discusses simple programs that print text, perform basic math operations, and make decisions using relational operators. Code examples are provided to demonstrate how to write, compile, and run simple C# console applications and use basic programming elements like variables, methods, and conditional statements.
This document provides an overview of key Java concepts including classes, objects, methods, fields, inheritance, interfaces, exceptions, and collections. Some key points:
- Java code is organized into classes which can contain fields to store data and methods to encapsulate behaviors. Objects are instantiated from classes.
- Fields can be declared with primitive types or as arrays/objects. Methods are declared with a return type and parameters.
- Inheritance allows subclasses to extend and override methods from parent classes. Interfaces define contracts that classes can implement.
- Exceptions provide error handling for exceptions that occur in code. Collections like ArrayList and LinkedList provide data structures to store and access multiple objects.
The document provides an overview of advanced features in the C# programming language, including interfaces, classes, structs, delegates, events, and other topics. It begins with learning objectives and an agenda, then reviews key object-oriented concepts. The remainder of the document describes interfaces, classes, structs, methods, properties, indexers, constants, fields, and other features in more detail.
This chapter discusses graphical user interfaces (GUIs) and object-oriented design in Java. It covers basic GUI components like JFrame, JLabel, JTextField and JButton. It explains how to create windows and add components to them. It also discusses event-driven programming and handling events. Finally, it provides an overview of object-oriented design principles like identifying classes and methods from the problem statement.
Inheritance, polymorphisam, abstract classes and composition)farhan amjad
The document discusses object-oriented programming concepts like inheritance, encapsulation, polymorphism and data hiding. It provides examples to explain inheritance, where a derived class inherits attributes and behaviors from a base class. Derived classes can specialize or extend the base class while reusing its code.
Classes allow binding of data and functions together through encapsulation. A class declaration specifies the data members and member functions, dividing them into private and public sections. Objects of a class are instantiated, allocating memory for each object. Member functions can access private data, while public functions are accessible to outside code. Friend functions declared in a class can also access private members but are not class members.
CRC stands for Class, Responsibilities, and Collaborators. The goal of CRC is to provide the simplest conceptual introduction to object-oriented modeling. The heart of CRC is the CRC card, which is used to document classes and their responsibilities and collaborators. CRC cards do not use UML directly, but the information on the cards is later translated into a UML class diagram. The CRC process involves domain experts and facilitators walking through scenarios to identify class responsibilities, which are documented on the cards. The cards are then arranged to show class collaborations, and the resulting model is reviewed.
The document contains descriptions of 83 Java programming challenges that involve a variety of concepts like calculating areas and perimeters of shapes, prime numbers, Fibonacci series, string manipulation, classes, objects, inheritance, polymorphism, arrays, command line arguments, and file handling. Many challenges require reading data from files or user input and processing it to find maximum/minimum values, totals or retrieve specific information as required. Common tasks mentioned include creating classes for shapes, bank accounts and employees, overriding methods, implementing interfaces, string formatting and exception handling.
Be in touch with your real life network final versionsAmnaMakki
GroupMe is a mobile group messaging app that allows users to start group conversations and share photos and locations with their contacts. It provides a unique phone number for each group that members can use to text or call into the group chat. GroupMe was founded in 2010, acquired by Skype in 2011, and works across iPhone, Android, BlackBerry and other mobile platforms.
This document discusses HTML and Java applets. It introduces HTML tags for formatting text, lists, tables, and embedding images and links. It explains how to convert a Java application into an applet and embed it in an HTML page. Key differences between applets and applications are that applets cannot access local files and have constraints on their user interface.
The document provides an overview of fundamentals of Java, including:
- A brief history of computers from the 1940s to present day.
- How computer hardware and software work together, with hardware being the physical devices and software providing functionality.
- How data and programs are represented digitally using bits, bytes, binary, and other number systems.
- The components of computer hardware and types of computer software.
- The evolution of programming languages from machine language to modern high-level languages like Java.
- The software development life cycle and waterfall model for developing software projects.
- Key concepts of object-oriented programming like classes, objects, encapsulation, inheritance, and polymorphism.
The document discusses key concepts of object-oriented programming with Java including classes, objects, encapsulation, inheritance, and polymorphism. It defines a class as a blueprint for objects and notes that objects are instances of classes that contain attributes and methods. The document explains that encapsulation groups related data and methods into a class and hides implementation details. Inheritance and polymorphism allow classes to share and extend behaviors from other classes. Constructors, methods, and the 'this' keyword are also covered.
Diving in OOP (Day 4): Polymorphism and Inheritance (All About Abstract Class...Akhil Mittal
This document provides an overview of abstract classes in C# object-oriented programming. It defines abstract classes as classes that cannot be instantiated and must be implemented in derived classes. The document demonstrates several key features of abstract classes through code examples, including: defining abstract and non-abstract methods in abstract classes; inheriting from abstract classes to instantiate derived classes; and requiring derived classes to implement abstract methods from the base abstract class.
The document discusses sequence diagrams, which show the interaction between objects and classes through a sequence of messages. Sequence diagrams are useful during the design phase to help understand system design and object interactions. They can also be used to document how existing systems work by showing the sequence of messages exchanged between objects.
This document provides instructions and tutorials for a lab on Visual Basic and spreadsheet programming basics. The lab consists of three tutorials that students should complete during the lab session or on their own time. The tutorials cover topics like creating macros, recording macros, modules and procedures, objects and collections in VBA, and the Range and Cells objects. Students are expected to work through examples and tasks in each tutorial. Their understanding of the material will be assessed on an upcoming Excel exam.
Lecture12 software design class diagramShahid Riaz
The document describes the key elements of a UML class diagram including classes, attributes, operations, relationships, interfaces, exceptions, packages and provides examples of each. It explains that a class diagram models the structure and behavior of a system by showing classes and relationships. Key relationships include associations, generalizations, dependencies and aggregations/compositions. The diagram notation for each element is also defined.
Welcome to my series of articles on Unified Modeling Language. This is "Session 3 – Class Diagram" of the series.
Please view my other documents where I have covered each UML diagram with examples
This document provides an overview of the Unified Modeling Language (UML) and how it can be used to design software systems. It discusses what UML is, why we use UML, and the main types of UML diagrams including use case diagrams, class diagrams, sequence diagrams, collaboration diagrams, and state diagrams. It also briefly mentions some popular UML modeling tools. The document aims to introduce students to UML and illustrate how different diagram types can be applied at different stages of the software design process.
Unit 1 introduction to visual basic programmingAbha Damani
This document provides an introduction to visual basic programming, covering topics such as variables, data types, operators, flow control, procedures, arrays, strings, and exception handling. It discusses the visual studio integrated development environment and its key components. It defines variables and data types, and covers implicit and explicit type conversions. Control flow structures like conditional statements, selection statements, and iteration statements are explained. Procedures such as subroutines and functions are defined. Finally, it provides examples of arrays and strings.
This document contains instructions and questions for an exam in an object-oriented programming course. It includes an honor code statement, directions on the exam format and scoring, and conceptual and programming questions. The conceptual questions cover topics like static class members, encapsulation through composition, inheritance hierarchies, and relationships between classes like is-a and has-a. The programming questions involve iterating through and printing an array, implementing methods for a class that stores coordinate data, and scaling coordinate values.
This document introduces programming and the basics of computer architecture. It discusses what programming is, the anatomy of a computer including central processing units and memory, machine code, and high-level languages. It also covers Java as a programming language, becoming familiar with development environments, and writing a simple "Hello World" program in Java to demonstrate compiling and running a program. Errors like syntax errors and logic errors are introduced.
This document outlines the key concepts covered in Chapter 3 of an introduction to C# programming textbook. It discusses simple programs that print text, perform basic math operations, and make decisions using relational operators. Code examples are provided to demonstrate how to write, compile, and run simple C# console applications and use basic programming elements like variables, methods, and conditional statements.
This document provides an overview of key Java concepts including classes, objects, methods, fields, inheritance, interfaces, exceptions, and collections. Some key points:
- Java code is organized into classes which can contain fields to store data and methods to encapsulate behaviors. Objects are instantiated from classes.
- Fields can be declared with primitive types or as arrays/objects. Methods are declared with a return type and parameters.
- Inheritance allows subclasses to extend and override methods from parent classes. Interfaces define contracts that classes can implement.
- Exceptions provide error handling for exceptions that occur in code. Collections like ArrayList and LinkedList provide data structures to store and access multiple objects.
The document provides an overview of advanced features in the C# programming language, including interfaces, classes, structs, delegates, events, and other topics. It begins with learning objectives and an agenda, then reviews key object-oriented concepts. The remainder of the document describes interfaces, classes, structs, methods, properties, indexers, constants, fields, and other features in more detail.
This chapter discusses graphical user interfaces (GUIs) and object-oriented design in Java. It covers basic GUI components like JFrame, JLabel, JTextField and JButton. It explains how to create windows and add components to them. It also discusses event-driven programming and handling events. Finally, it provides an overview of object-oriented design principles like identifying classes and methods from the problem statement.
Inheritance, polymorphisam, abstract classes and composition)farhan amjad
The document discusses object-oriented programming concepts like inheritance, encapsulation, polymorphism and data hiding. It provides examples to explain inheritance, where a derived class inherits attributes and behaviors from a base class. Derived classes can specialize or extend the base class while reusing its code.
Classes allow binding of data and functions together through encapsulation. A class declaration specifies the data members and member functions, dividing them into private and public sections. Objects of a class are instantiated, allocating memory for each object. Member functions can access private data, while public functions are accessible to outside code. Friend functions declared in a class can also access private members but are not class members.
CRC stands for Class, Responsibilities, and Collaborators. The goal of CRC is to provide the simplest conceptual introduction to object-oriented modeling. The heart of CRC is the CRC card, which is used to document classes and their responsibilities and collaborators. CRC cards do not use UML directly, but the information on the cards is later translated into a UML class diagram. The CRC process involves domain experts and facilitators walking through scenarios to identify class responsibilities, which are documented on the cards. The cards are then arranged to show class collaborations, and the resulting model is reviewed.
The document contains descriptions of 83 Java programming challenges that involve a variety of concepts like calculating areas and perimeters of shapes, prime numbers, Fibonacci series, string manipulation, classes, objects, inheritance, polymorphism, arrays, command line arguments, and file handling. Many challenges require reading data from files or user input and processing it to find maximum/minimum values, totals or retrieve specific information as required. Common tasks mentioned include creating classes for shapes, bank accounts and employees, overriding methods, implementing interfaces, string formatting and exception handling.
Be in touch with your real life network final versionsAmnaMakki
GroupMe is a mobile group messaging app that allows users to start group conversations and share photos and locations with their contacts. It provides a unique phone number for each group that members can use to text or call into the group chat. GroupMe was founded in 2010, acquired by Skype in 2011, and works across iPhone, Android, BlackBerry and other mobile platforms.
Ken Margoe performs stand up magic, christmas party magic, stage & walk around magic for corporate & wedding entertainment in Toronto. Illusionist & Corporate Magician entertains at regular magic shows & events.
Orbuslogic Solutions Pvt. Ltd. is one of the leading designers for residential and commercial projects in Kanpur with a modern and integrated team of designers. They take pride in their craftsmanship and services to provide superior interior designing, web solutions, software solutions, and network solutions. Some of their clients include Mr. Sadique, Mr. Rajesh Ahuja, Mr. Abhimanyu Singh, and Mr. Dinesh Gupta.
The document is a chapter from a Java programming textbook about fundamental data types in Java. It discusses integer and floating-point number types, constants, arithmetic expressions, and string types. It provides examples of defining and using numeric variables and constants, arithmetic operations, and casting between types. It also includes self-check questions and answers about numeric concepts in Java.
This document provides information about an introduction to educational technology course taught by Mr. Chande Kasita. It lists the instructor's contact details and learning outcomes of the course. It also discusses various topics that will be covered including developing websites, designing creative lessons, using digital tools for teaching and assessments, and finding online resources. Additionally, it provides an overview of popular search engines, general searching tips and techniques, and specific operators that can be used to refine searches.
Geo Earth Mapping has provided cost-effective geographic solutions to businesses, government, and non-profits since 2004, creating professional, accurate maps customized to client needs in a timely manner with follow-up service. They offer GIS analysis, GPS data conversion, topographical maps, environmental mapping, forestry mapping, recreation maps, street maps, community plans, municipal mapping, land use plans, and graphic design services.
I am Thanasis F. I am an Online C++ Homework Expert at cpphomeworkhelp.com. I hold a Masters in Programming from Harvard University. I have been helping students with their homework for the past 6 years. I solve homework related to Online C++.
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While writing program in any language, you need to use various variables to s...bhargavi804095
While writing program in any language, you need to use various variables to store various information. Variables are nothing but reserved memory locations to store values. This means that when you create a variable you reserve some space in memory.
This document discusses classes and objects in C++. It provides examples of defining a BankAccount class with member variables like name and balance, as well as member functions like deposit and withdraw. It covers key concepts like encapsulation, constructors, and operator overloading. The document is intended for a guest lecture on classes and objects in the CS 106X course at Stanford University.
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This Programming Using C++ contain 22 Units and each Unit contains 60 to 80 slides in it.
Course Outline...
• Introduction to Oops
• Structure of a program
• Iteration structures (loops)
• Scope of variables
• Write and execute C++ programs
• Use arrays and structures
• Pointers
• Arguments passed by value and by reference.
• Overloaded functions
• Inline functions
• Data Structures
• Unions
• Implement encapsulation and abstraction
• Use operators and decision-making constructs
• Work with arrays
• Implement polymorphism and inheritance
• Use exception handling and templates
• Implement linked lists
The document discusses implementing classes in Java. It begins with an example class called Counter that models a tally counter. It then covers key concepts for implementing classes like instance variables, methods, constructors, and encapsulation. It provides examples of implementing a simple Counter class with methods like click(), getValue(), and reset(). It also discusses specifying the public interface of a class before implementation, using a hypothetical BankAccount class as an example.
In this chapter we will understand how to define custom classes and their elements. We will learn to declare fields, constructors and properties for the classes. We will revise what a method is and we will broaden our knowledge about access modifiers and methods.
The document discusses various C# object-oriented programming concepts including classes, structs, class members, passing values by value and reference, method overloading, constructors, static constructors, read-only fields, partial classes, static classes, and the Object class. It provides examples of declaring classes and structs, defining class members like fields, properties, methods, and constructors. It also covers passing parameters, calling constructors from other constructors, readonly fields, and anonymous types.
I am having trouble writing the individual files for part 1, which i.pdfmallik3000
I am having trouble writing the individual files for part 1, which is as follows:
part 1
Purpose
This assignment reviews object-oriented programming concepts such as classes, methods,
constructors, accessor methods, and access modifiers. It makes use of an array of objects as a
class data member, and introduces the concept of object serialization or \"binary I/O\".
Set Up
(Yes, these commands are rather tedious to type repeatedly. Part 2 of this assignment introduces
a new technique for compiling and linking your program files called a makefile. Makefiles
require a bit more work up front, but save a lot of typing at the command line once the makefile
has been created.)
As in Assignment 1, you should create a subdirectory to hold your files for Assignment 2.
In that directory, make a symbolic link to the data file for this part of the assignment:
In this assignment, you will be creating several source code and header files, as described below.
You can create each of these files separately using the nano editor, just as you did on Assignment
1.
To compile and link the program you\'ve created, type:
Once you\'ve added the AccountDB class, you should type:
To run the executable file created by the previous command, type:
Program
For this assignment, you will need to write three source code files as well as two header files.
Each of these files is relatively short, but many inexperienced programmers are overwhelmed by
the idea of writing a program as multiple files. \"Where do I start?!!\" is a common refrain. This
assignment sheet attempts to walk you through the steps of writing a multi-file program.
The steps outlined below should not be thought of as a purely linear process, but rather an
iterative one - For example, work a little on Step 1, then a little on Step 2, then test what you\'ve
written (Step 3).
Step 1: Write the CreditAccount class declaration
The CreditAccount class represents information about a credit card account. The code for the
CreditAccount class will be placed in two separate files, which is the norm for non-template C++
classes.
The header file for a class contains the class declaration, including declarations of any data
members and prototypes for the methods of the class. The name of the header file should be of
the form ClassName.h (for example, CreditAccount.h for the header file of theCreditAccount
class).
A skeleton for the CreditAccount.h file is given below. As shown, a header file should begin and
end with header guards to prevent it from accidentally being #included more than once in the
same source code file (which would produce duplicate symbol definition errors). The symbol
name used in the header guards can be any valid C++ name that is not already in use in your
program or the C/C++ libraries. Using a name of the format CLASSNAME_H (like
CREDIT_ACCOUNT_H in the code below) is recommended to avoid naming conflicts.
Data Members
The CreditAccount class should have the following private data members:
an accoun.
This document outlines lab work assignments for an object-oriented programming course. The assignments include:
1) Creating a class to register student details and prevent duplicate entries.
2) Creating a banking account class to perform deposit, withdrawal, and statement printing transactions.
3) Creating a mobile phone class to store phone details and allow user login/selection of products to calculate total cost.
The document provides an overview of mapping value type objects, collections, and database relationships in Hibernate. It discusses how to map shared properties as components using the <component> element, and how to map collections like sets, lists, and bags using the <set>, <list>, and <bag> elements respectively. It also demonstrates how to define one-to-one, one-to-many, and many-to-many relationships between entity classes to represent relationships between database tables.
The server containing programming assignments is located at 10.203.161.7 under the ~/CPP/ directory. The document outlines various C++ programming assignments divided across multiple sessions, including writing classes, operator overloading, inheritance, polymorphism, and more. Assignments involve concepts such as memory management, pass by reference, constructors/destructors, friend functions, and virtual functions.
This document discusses various types of constructors in C++ including default, parameterized, copy constructors, and destructors. It also covers initialization lists, static class members, constant objects, and summarizes their key purposes and behaviors. Default constructors initialize objects without parameters, parameterized constructors allow passing initialization values, and copy constructors copy data from one object to another. Destructors clean up object resources. Initialization lists assign member values, static members have a single instance shared among objects, and constant objects cannot be modified.
This document summarizes projects completed by Matt Willmer as part of a .NET Masters program. The projects involved building multi-tier applications using technologies like C#, ASP.NET, Windows Forms, SQL Server, and Visual Studio. Project 1 focused on learning C# features like properties and enumerators. Project 2 involved creating a Windows Forms application for a library management system. Project 3 added database functionality using LINQ to SQL. Project 4 created a web-based presentation layer for the library system using ASP.NET.
Classes and objects are key concepts in C++. A class defines the data and functions that can act on that data, while an object is an instance of a class. Classes contain public and private members to control access and promote reusability. Common tasks like initializing data, cleaning up memory, and accessing members are handled through constructors, destructors, and methods. Well-designed classes encapsulate data and behavior to be reused across programs while hiding implementation details. Examples demonstrate defining classes for counters, checkbooks, cans, and using built-in classes like string and file streams.
The document provides a list of 25 multiple choice questions related to C++ programming concepts such as classes, objects, inheritance, polymorphism, memory management, and more. Each question has 3-4 possible answer choices and is worth a certain number of points. The questions cover topics that would be included on a final exam for a C++ programming course.
The document outlines 9 tasks for an OOP lab on objects and classes using the BlueJ programming environment. Students are asked to explain programming paradigms, describe OOP concepts, create bank and customer objects with accounts to deposit and withdraw funds, add address fields to customers, and create an Address class to store customer address information.
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PT1420: File Access and Visual Basic
Page 1
This lab examines how to work with a file by writing Visual Basic code. Read the following
programming problem prior to completing the lab.
Write and design a simple program that will take 3 pieces of data and write it to a file. Create
variables and set them equal to the appropriate values:
Declare string firstName = “xxx”
Declare string lastName = “xxx”
Declare integer age = your age
Write this information to a file called myRecords.txt. Next, read this information from
the file and print it to the screen.
Step 1: Create a new Visual Basic workspace and add the following code:
Module Module1
Sub Main()
Dim firstName As String = "XXXX"
Dim lastName As String = "XXX"
Dim age As Integer = ####
Dim writer As System.IO.StreamWriter = System.IO.File.CreateText("myRecords.txt")
writer.WriteLine(firstName & " " & lastName & " " & age)
writer.Close()
Dim reader As System.IO.StreamReader = System.IO.File.OpenText("myRecords.txt")
Dim myInfo As String = reader.ReadLine()
Console.WriteLine(myInfo)
PT1420: File Access and Visual Basic
Page 2
reader.Close()
'this causes a pause so you can see your program
Console.Write("Press enter to continue...")
Console.ReadLine()
End Sub
End Module
Your module looks like this:
PT1420: File Access and Visual Basic
Page 3
Step 2: Change the values of the variables to your records. Your module looks like this:
Step 3: Run your program so that it works properly. Your output might look as follows:
PT1420: File Access and Visual Basic
Page 4
Step 4: Locate the .txt file in the bin\debug folder, and view your .txt file. Your output might
look as follows:
PT1420: File Access and Visual Basic
Page 5
Step 5: Submit the Visual Basic code as a compressed (zipped) folder using the following steps:
a. Open Windows Explorer --> Start --> All Programs --> Accessories --> Windows Explorer.
Your Windows Explorer might look as follows:
...
Programming II hiding, and replacing members, Serialization, Generics, Linq ExceptionType
enum You will implement this enum in Visual Studio. There are seven members: Assignment 4 -
Implementing a Banking Application Due: See course shell for due date and time Check with
you professor to see if you are permitted to work as a group. The members are self-explanatory.
AccountType enum You will implement this enum in Visual Studio. There are three members:
The application is by far the most complex system that you have attempted so far. It consists of
eleven classes, two structs, one interface and two enums coupled in varying degrees of tightness.
The Bank class is the main driver of the application. It has collection of Accounts and Person
that is initialize appropriately in the static constructor. You will implement the entire system in
Visual Studio. A short description of each type with their members is given below. You are
advised to implement each type in the order that they are described. No method should have a
Console. WriteLine() unless you are explicitly told to output something on the console. Each
type must be in separate files.
Assignment 4, Winter 2022 Assignment 4, Winter 2022 hiding, and replacing members,
Serialization, Generics, ling Uses - Inheritance, Interfaces, Exceptions, EventHandlers,
Collections Operator overloading, Utils class hiding, and replacing members, Serialization,
Generics, Ling [The implementation for this class is given in the appendix. Create a class called
UtIs and copy and 1. Time - this public class variable is of type Day Time. It adds a random
value to the internal field_time and then returns it. past the statements into the appropriate part of
the file] 2. Now - this public class variable is of type Day Time. It adds zero to the internal
field_time You will implement the Utils class in Visual Studio. This class is comprised of three
fields and and then returns it. provides two static properties. It simulates the passage of time.
Each time the Time property is Methods: accessed, it increases the internal field by a random
amount. It is used to time stamped all banking There are no explicitly defined methods. You do
not have to code this class. Just copy the code statements from the appendix of this A short
description of each dass member is given below: document. Properties: There are three
properties. 1. _time - this private class variable is of type DayTime that store the time of this
object. It is initialized (with argument 1_648_600_800 ) at declaration. It is mutated (changed)
whenever either of the properties is accessed. 2. random - this private class variable is of type
Random storing the time of this object. It is initialized (with argument 1_848_800_800) at
declaration. It is mutated (changed) whenever elther of the properties is accessed. 3.
ACCOUNT_TYPE - this private class variable is of type Dictionary. It serves as a lookup table
to match an account type with a particular prefix, It is i.
UiPath Test Automation using UiPath Test Suite series, part 6DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 6. In this session, we will cover Test Automation with generative AI and Open AI.
UiPath Test Automation with generative AI and Open AI webinar offers an in-depth exploration of leveraging cutting-edge technologies for test automation within the UiPath platform. Attendees will delve into the integration of generative AI, a test automation solution, with Open AI advanced natural language processing capabilities.
Throughout the session, participants will discover how this synergy empowers testers to automate repetitive tasks, enhance testing accuracy, and expedite the software testing life cycle. Topics covered include the seamless integration process, practical use cases, and the benefits of harnessing AI-driven automation for UiPath testing initiatives. By attending this webinar, testers, and automation professionals can gain valuable insights into harnessing the power of AI to optimize their test automation workflows within the UiPath ecosystem, ultimately driving efficiency and quality in software development processes.
What will you get from this session?
1. Insights into integrating generative AI.
2. Understanding how this integration enhances test automation within the UiPath platform
3. Practical demonstrations
4. Exploration of real-world use cases illustrating the benefits of AI-driven test automation for UiPath
Topics covered:
What is generative AI
Test Automation with generative AI and Open AI.
UiPath integration with generative AI
Speaker:
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
Unlock the Future of Search with MongoDB Atlas_ Vector Search Unleashed.pdfMalak Abu Hammad
Discover how MongoDB Atlas and vector search technology can revolutionize your application's search capabilities. This comprehensive presentation covers:
* What is Vector Search?
* Importance and benefits of vector search
* Practical use cases across various industries
* Step-by-step implementation guide
* Live demos with code snippets
* Enhancing LLM capabilities with vector search
* Best practices and optimization strategies
Perfect for developers, AI enthusiasts, and tech leaders. Learn how to leverage MongoDB Atlas to deliver highly relevant, context-aware search results, transforming your data retrieval process. Stay ahead in tech innovation and maximize the potential of your applications.
#MongoDB #VectorSearch #AI #SemanticSearch #TechInnovation #DataScience #LLM #MachineLearning #SearchTechnology
How to Get CNIC Information System with Paksim Ga.pptxdanishmna97
Pakdata Cf is a groundbreaking system designed to streamline and facilitate access to CNIC information. This innovative platform leverages advanced technology to provide users with efficient and secure access to their CNIC details.
Why You Should Replace Windows 11 with Nitrux Linux 3.5.0 for enhanced perfor...SOFTTECHHUB
The choice of an operating system plays a pivotal role in shaping our computing experience. For decades, Microsoft's Windows has dominated the market, offering a familiar and widely adopted platform for personal and professional use. However, as technological advancements continue to push the boundaries of innovation, alternative operating systems have emerged, challenging the status quo and offering users a fresh perspective on computing.
One such alternative that has garnered significant attention and acclaim is Nitrux Linux 3.5.0, a sleek, powerful, and user-friendly Linux distribution that promises to redefine the way we interact with our devices. With its focus on performance, security, and customization, Nitrux Linux presents a compelling case for those seeking to break free from the constraints of proprietary software and embrace the freedom and flexibility of open-source computing.
In his public lecture, Christian Timmerer provides insights into the fascinating history of video streaming, starting from its humble beginnings before YouTube to the groundbreaking technologies that now dominate platforms like Netflix and ORF ON. Timmerer also presents provocative contributions of his own that have significantly influenced the industry. He concludes by looking at future challenges and invites the audience to join in a discussion.
In the rapidly evolving landscape of technologies, XML continues to play a vital role in structuring, storing, and transporting data across diverse systems. The recent advancements in artificial intelligence (AI) present new methodologies for enhancing XML development workflows, introducing efficiency, automation, and intelligent capabilities. This presentation will outline the scope and perspective of utilizing AI in XML development. The potential benefits and the possible pitfalls will be highlighted, providing a balanced view of the subject.
We will explore the capabilities of AI in understanding XML markup languages and autonomously creating structured XML content. Additionally, we will examine the capacity of AI to enrich plain text with appropriate XML markup. Practical examples and methodological guidelines will be provided to elucidate how AI can be effectively prompted to interpret and generate accurate XML markup.
Further emphasis will be placed on the role of AI in developing XSLT, or schemas such as XSD and Schematron. We will address the techniques and strategies adopted to create prompts for generating code, explaining code, or refactoring the code, and the results achieved.
The discussion will extend to how AI can be used to transform XML content. In particular, the focus will be on the use of AI XPath extension functions in XSLT, Schematron, Schematron Quick Fixes, or for XML content refactoring.
The presentation aims to deliver a comprehensive overview of AI usage in XML development, providing attendees with the necessary knowledge to make informed decisions. Whether you’re at the early stages of adopting AI or considering integrating it in advanced XML development, this presentation will cover all levels of expertise.
By highlighting the potential advantages and challenges of integrating AI with XML development tools and languages, the presentation seeks to inspire thoughtful conversation around the future of XML development. We’ll not only delve into the technical aspects of AI-powered XML development but also discuss practical implications and possible future directions.
GraphSummit Singapore | The Art of the Possible with Graph - Q2 2024Neo4j
Neha Bajwa, Vice President of Product Marketing, Neo4j
Join us as we explore breakthrough innovations enabled by interconnected data and AI. Discover firsthand how organizations use relationships in data to uncover contextual insights and solve our most pressing challenges – from optimizing supply chains, detecting fraud, and improving customer experiences to accelerating drug discoveries.
Full-RAG: A modern architecture for hyper-personalizationZilliz
Mike Del Balso, CEO & Co-Founder at Tecton, presents "Full RAG," a novel approach to AI recommendation systems, aiming to push beyond the limitations of traditional models through a deep integration of contextual insights and real-time data, leveraging the Retrieval-Augmented Generation architecture. This talk will outline Full RAG's potential to significantly enhance personalization, address engineering challenges such as data management and model training, and introduce data enrichment with reranking as a key solution. Attendees will gain crucial insights into the importance of hyperpersonalization in AI, the capabilities of Full RAG for advanced personalization, and strategies for managing complex data integrations for deploying cutting-edge AI solutions.
GraphRAG for Life Science to increase LLM accuracyTomaz Bratanic
GraphRAG for life science domain, where you retriever information from biomedical knowledge graphs using LLMs to increase the accuracy and performance of generated answers
Observability Concepts EVERY Developer Should Know -- DeveloperWeek Europe.pdfPaige Cruz
Monitoring and observability aren’t traditionally found in software curriculums and many of us cobble this knowledge together from whatever vendor or ecosystem we were first introduced to and whatever is a part of your current company’s observability stack.
While the dev and ops silo continues to crumble….many organizations still relegate monitoring & observability as the purview of ops, infra and SRE teams. This is a mistake - achieving a highly observable system requires collaboration up and down the stack.
I, a former op, would like to extend an invitation to all application developers to join the observability party will share these foundational concepts to build on:
Goodbye Windows 11: Make Way for Nitrux Linux 3.5.0!SOFTTECHHUB
As the digital landscape continually evolves, operating systems play a critical role in shaping user experiences and productivity. The launch of Nitrux Linux 3.5.0 marks a significant milestone, offering a robust alternative to traditional systems such as Windows 11. This article delves into the essence of Nitrux Linux 3.5.0, exploring its unique features, advantages, and how it stands as a compelling choice for both casual users and tech enthusiasts.
GraphSummit Singapore | The Future of Agility: Supercharging Digital Transfor...Neo4j
Leonard Jayamohan, Partner & Generative AI Lead, Deloitte
This keynote will reveal how Deloitte leverages Neo4j’s graph power for groundbreaking digital twin solutions, achieving a staggering 100x performance boost. Discover the essential role knowledge graphs play in successful generative AI implementations. Plus, get an exclusive look at an innovative Neo4j + Generative AI solution Deloitte is developing in-house.
Driving Business Innovation: Latest Generative AI Advancements & Success StorySafe Software
Are you ready to revolutionize how you handle data? Join us for a webinar where we’ll bring you up to speed with the latest advancements in Generative AI technology and discover how leveraging FME with tools from giants like Google Gemini, Amazon, and Microsoft OpenAI can supercharge your workflow efficiency.
During the hour, we’ll take you through:
Guest Speaker Segment with Hannah Barrington: Dive into the world of dynamic real estate marketing with Hannah, the Marketing Manager at Workspace Group. Hear firsthand how their team generates engaging descriptions for thousands of office units by integrating diverse data sources—from PDF floorplans to web pages—using FME transformers, like OpenAIVisionConnector and AnthropicVisionConnector. This use case will show you how GenAI can streamline content creation for marketing across the board.
Ollama Use Case: Learn how Scenario Specialist Dmitri Bagh has utilized Ollama within FME to input data, create custom models, and enhance security protocols. This segment will include demos to illustrate the full capabilities of FME in AI-driven processes.
Custom AI Models: Discover how to leverage FME to build personalized AI models using your data. Whether it’s populating a model with local data for added security or integrating public AI tools, find out how FME facilitates a versatile and secure approach to AI.
We’ll wrap up with a live Q&A session where you can engage with our experts on your specific use cases, and learn more about optimizing your data workflows with AI.
This webinar is ideal for professionals seeking to harness the power of AI within their data management systems while ensuring high levels of customization and security. Whether you're a novice or an expert, gain actionable insights and strategies to elevate your data processes. Join us to see how FME and AI can revolutionize how you work with data!
Climate Impact of Software Testing at Nordic Testing DaysKari Kakkonen
My slides at Nordic Testing Days 6.6.2024
Climate impact / sustainability of software testing discussed on the talk. ICT and testing must carry their part of global responsibility to help with the climat warming. We can minimize the carbon footprint but we can also have a carbon handprint, a positive impact on the climate. Quality characteristics can be added with sustainability, and then measured continuously. Test environments can be used less, and in smaller scale and on demand. Test techniques can be used in optimizing or minimizing number of tests. Test automation can be used to speed up testing.
Dr. Sean Tan, Head of Data Science, Changi Airport Group
Discover how Changi Airport Group (CAG) leverages graph technologies and generative AI to revolutionize their search capabilities. This session delves into the unique search needs of CAG’s diverse passengers and customers, showcasing how graph data structures enhance the accuracy and relevance of AI-generated search results, mitigating the risk of “hallucinations” and improving the overall customer journey.
Essentials of Automations: The Art of Triggers and Actions in FMESafe Software
In this second installment of our Essentials of Automations webinar series, we’ll explore the landscape of triggers and actions, guiding you through the nuances of authoring and adapting workspaces for seamless automations. Gain an understanding of the full spectrum of triggers and actions available in FME, empowering you to enhance your workspaces for efficient automation.
We’ll kick things off by showcasing the most commonly used event-based triggers, introducing you to various automation workflows like manual triggers, schedules, directory watchers, and more. Plus, see how these elements play out in real scenarios.
Whether you’re tweaking your current setup or building from the ground up, this session will arm you with the tools and insights needed to transform your FME usage into a powerhouse of productivity. Join us to discover effective strategies that simplify complex processes, enhancing your productivity and transforming your data management practices with FME. Let’s turn complexity into clarity and make your workspaces work wonders!
9. In Chapters 1 and 2, you used System.out as a black box to cause output to appear on the screen. Who designed and implemented System.out ? Answer: The programmers who designed and implemented the Java library. Self Check 3.1
10. Suppose you are working in a company that produces personal finance software. You are asked to design and implement a class for representing bank accounts. Who will be the users of your class? Answer: Other programmers who work on the personal finance application. Self Check 3.2
11.
12.
13.
14. accessSpecifier returnType methodName ( parameterType parameterName , . . .) { method body } Example: public void deposit(double amount) { . . . } Purpose: To define the behavior of a method. Syntax 3.1 Method Definition
15.
16. accessSpecifier ClassName ( parameterType parameterName , . . .) { constructor body } Example: public BankAccount(double initialBalance) { . . . } Purpose: To define the behavior of a constructor. Syntax 3.2 Constructor Definition
17. The public constructors and methods of a class form the public interface of the class. public class BankAccount { // Constructors public BankAccount() { // body--filled in later } public BankAccount(double initialBalance) { // body--filled in later } Continued BankAccount Public Interface
18. // Methods public void deposit(double amount) { // body--filled in later } public void withdraw(double amount) { // body--filled in later } public double getBalance() { // body--filled in later } // private fields--filled in later } BankAccount Public Interface (cont.)
19. accessSpecifier class ClassName { constructors methods fields } Example: public class BankAccount { public BankAccount(double initialBalance) {. . .} public void deposit(double amount) {. . .} . . . } Purpose: To define a class, its public interface, and its implementation details. Syntax 3.3 Class Definition
20. How can you use the methods of the public interface to empty the harrysChecking bank account? Answer: harrysChecking.withdraw(harrysChecking.getBalance()) Self Check 3.3
21. Suppose you want a more powerful bank account abstraction that keeps track of an account number in addition to the balance. How would you change the public interface to accommodate this enhancement? Answer: Add an accountNumber parameter to the constructors, and add a getAccountNumber method. There is no need for a setAccountNumber method – the account number never changes after construction. Self Check 3.4
22. /** Withdraws money from the bank account. @param the amount to withdraw */ public void withdraw(double amount) { //implementation filled in later } /** Gets the current balance of the bank account. @return the current balance */ public double getBalance() { //implementation filled in later } Commenting the Public Interface
26. Suppose we enhance the BankAccount class so that each account has an account number. Supply a documentation comment for the constructor public BankAccount(int accountNumber, double initialBalance) Answer: /** Constructs a new bank account with a given initial balance. @param accountNumber the account number for this account @param initialBalance the initial balance for this account */ Self Check 3.5
27. Why is the following documentation comment questionable? /** Each account has an account number. @return the account number of this account */ public int getAccountNumber() Answer: The first sentence of the method description should describe the method – it is displayed in isolation in the summary table. Self Check 3.6
31. accessSpecifier class ClassName { . . . accessSpecifier fieldType fieldName ; . . . } Example: public class BankAccount { . . . private double balance; . . . } Purpose: To define a field that is present in every object of a class. Syntax 3.4 Instance Field Declaration
32.
33.
34. Suppose we modify the BankAccount class so that each bank account has an account number. How does this change affect the instance fields? Answer: An instance field private int accountNumber; needs to be added to the class. Self Check 3.7
35. What are the instance fields of the Rectangle class? Answer: There are four fields, x , y , width and height . All four fields have type int . Self Check 3.8
36.
37.
38.
39.
40. return expression ; or return; Example: return balance; Purpose: To specify the value that a method returns, and exit the method immediately. The return value becomes the value of the method call expression. Syntax 3.5 The return Statement
41. 01: /** 02: A bank account has a balance that can be changed by 03: deposits and withdrawals. 04: */ 05: public class BankAccount 06: { 07: /** 08: Constructs a bank account with a zero balance. 09: */ 10: public BankAccount() 11: { 12: balance = 0 ; 13: } 14: 15: /** 16: Constructs a bank account with a given balance. 17: @param initialBalance the initial balance 18: */ 19: public BankAccount( double initialBalance ) 20: { 21: balance = initialBalance ; 22: } 23: Continued ch03/account/BankAccount.java
42. 24: /** 25: Deposits money into the bank account. 26: @param amount the amount to deposit 27: */ 28: public void deposit( double amount ) 29: { 30: double newBalance = balance + amount ; 31: balance = newBalance ; 32: } 33: 34: /** 35: Withdraws money from the bank account. 36: @param amount the amount to withdraw 37: */ 38: public void withdraw( double amount ) 39: { 40: double newBalance = balance - amount ; 41: balance = newBalance ; 42: } 43: 44: /** 45: Gets the current balance of the bank account. 46: @return the current balance 47: */ Continued ch03/account/BankAccount.java (cont.)
44. The Rectangle class has four instance fields: x , y , width , and height . Give a possible implementation of the getWidth method. Answer: public int getWidth() { return width; } Self Check 3.9
45. Give a possible implementation of the translate method of the Rectangle class. Answer: There is more than one correct answer. One possible implementation is as follows: public void translate(int dx, int dy) { int newx = x + dx; x = newx; int newy = y + dy; y = newy; } Self Check 3.10
46.
47.
48. 01: /** 02: A class to test the BankAccount class. 03: */ 04: public class BankAccountTester 05: { 06: /** 07: Tests the methods of the BankAccount class. 08: @param args not used 09: */ 10: public static void main( String [] args ) 11: { 12: BankAccount harrysChecking = new BankAccount(); 13: harrysChecking .deposit( 2000 ); 14: harrysChecking .withdraw( 500 ); 15: System . out .println( harrysChecking .getBalance()); 16: System . out .println( "Expected: 1500" ); 17: } 18: } Output: 1500 Expected: 1500 ch03/account/BankAccountTester.java
50. When you run the BankAccountTester program, how many objects of class BankAccount are constructed? How many objects of type BankAccountTester ? Answer: One BankAccount object, no BankAccountTester object. The purpose of the BankAccountTester class is merely to hold the main method. Self Check 3.11
51. Why is the BankAccountTester class unnecessary in development environments that allow interactive testing, such as BlueJ? Answer: In those environments, you can issue interactive commands to construct BankAccount objects, invoke methods, and display their return values. Self Check 3.12
58. What do local variables and parameter variables have in common? In which essential aspect do they differ? Answer: Variables of both categories belong to methods – they come alive when the method is called, and they die when the method exits. They differ in their initialization. Parameter variables are initialized with the call values; local variables must be explicitly initialized. Self Check 3.13
59. During execution of the BankAccountTester program in the preceding section, how many instance fields, local variables, and parameter variables were created, and what were their names? Answer: One instance field, named balance . Three local variables, one named harrysChecking and two named newBalance (in the deposit and withdraw methods); two parameter variables, both named amount (in the deposit and withdraw methods). Self Check 3.14
64. How many implicit and explicit parameters does the withdraw method of the BankAccount class have, and what are their names and types? Answer: One implicit parameter, called this , of type BankAccount , and one explicit parameter, called amount , of type double . Self Check 3.15
65. In the deposit method, what is the meaning of this.amount ? Or, if the expression has no meaning, why not? Answer: It is not a legal expression. this is of type BankAccount and the BankAccount class has no field named amount . Self Check 3.16
66. How many implicit and explicit parameters does the main method of the BankAccountTester class have, and what are they called? Answer: No implicit parameter–the method is static–and one explicit parameter, called args . Self Check 3.17
67. Good practice: Make a class for each graphical shape public class Car { public Car(int x, int y) { // Remember position . . . } public void draw(Graphics2D g2) { // Drawing instructions . . . } } Shape Classes
72. 01: import java . awt . Graphics2D ; 02: import java . awt . Rectangle ; 03: import java . awt . geom . Ellipse2D ; 04: import java . awt . geom . Line2D ; 05: import java . awt . geom . Point2D ; 06: 07: /** 08: A car shape that can be positioned anywhere on the screen. 09: */ 10: public class Car 11: { 12: /** 13: Constructs a car with a given top left corner 14: @param x the x coordinate of the top left corner 15: @param y the y coordinate of the top left corner 16: */ 17: public Car( int x , int y ) 18: { 19: xLeft = x ; 20: yTop = y ; 21: } 22: Continued ch03/car/Car.java
73. 23: /** 24: Draws the car. 25: @param g2 the graphics context 26: */ 27: public void draw( Graphics2D g2 ) 28: { 29: Rectangle body 30: = new Rectangle( xLeft , yTop + 10 , 60 , 10 ); 31: Ellipse2D . Double frontTire 32: = new Ellipse2D .Double( xLeft + 10 , yTop + 20 , 10 , 10 ); 33: Ellipse2D . Double rearTire 34: = new Ellipse2D .Double( xLeft + 40 , yTop + 20 , 10 , 10 ); 35: 36: // The bottom of the front windshield 37: Point2D . Double r1 38: = new Point2D .Double( xLeft + 10 , yTop + 10 ); 39: // The front of the roof 40: Point2D . Double r2 41: = new Point2D .Double( xLeft + 20 , yTop ); 42: // The rear of the roof 43: Point2D . Double r3 44: = new Point2D .Double( xLeft + 40 , yTop ); 45: // The bottom of the rear windshield Continued ch03/car/Car.java (cont.)
77. Which class needs to be modified to have the two cars positioned next to each other? Answer: CarComponent Self Check 3.18
78. Which class needs to be modified to have the car tires painted in black, and what modification do you need to make? Answer: In the draw method of the Car class, call g2.fill(frontTire); g2.fill(rearTire); Self Check 3.19
79. How do you make the cars twice as big? Answer: Double all measurements in the draw method of the Car class. Self Check 3.20
80. Rectangle leftRectangle = new Rectangle(100, 100, 30, 60); Rectangle rightRectangle = new Rectangle(160, 100, 30, 60); Line2D.Double topLine = new Line2D.Double(130, 100, 160, 100); Line2D.Double bottomLine = new Line2D.Double(130, 160, 160, 160); Drawing Graphical Shapes