The document provides information on the super and this keywords in Java, nested try-catch blocks, best practices for using the final keyword, tips on using constructors and the finally block, and answers frequently asked questions. It discusses that the super keyword enables a subclass to refer to the superclass and invoke superclass methods and constructors. The this keyword refers to the current object. A nested try-catch block has an inner try-catch block enclosed within an outer try-catch block, so that exceptions can be handled in the outer block if not caught in the inner block.
This document discusses polymorphism in Java programs. Polymorphism refers to the ability of an object to take on multiple forms. In Java, polymorphism allows a reference variable to change behavior based on the object it is holding. There are three forms of polymorphism in Java: method overriding, overriding abstract methods of an abstract class, and implementing interface methods. Polymorphism provides benefits like simplicity and extensibility in code.
Polymorphism in java, method overloading and method overridingJavaTportal
Polymorphism come from the two Greek words ‘poly’ meaning many and ‘morphs” meaning forms. The ability to exist in different form is called polymorphism. The same variable or method can perform different tasks; the programmer has the advantage of writing flexible code.
This document discusses object-oriented programming concepts like inheritance, polymorphism, overloading, and overriding. It provides examples of inheritance hierarchies for different types of birds. Inheritance allows subclasses to inherit attributes and methods from parent classes. Polymorphism means an object can have different implementations of the same method depending on its type. Overloading and overriding relate to creating multiple methods with the same name that differ in parameters or implementation.
This document discusses polymorphism and inheritance concepts in Java. It defines polymorphism as an object taking on many forms, and describes method overloading and overriding. Method overloading allows classes to have multiple methods with the same name but different parameters. Method overriding allows subclasses to provide a specific implementation of a method in the parent class. The document also discusses abstract classes and interfaces for abstraction in Java, and explains access modifiers like public, private, protected, and default.
OOPs with Java - Packaging and Access Modifiers Hitesh-Java
In this core java training session, you will learn OOPs. Topics covered in this session are:
• Packaging Classes & Access Modifiers
For more information about this course visit on this link: https://www.mindsmapped.com/courses/software-development/learn-java-fundamentals-hands-on-training-on-core-java-concepts/
Java is an object-oriented programming language that is architecture-neutral, portable, distributed, high-performance, interpreted, multithreaded, robust, dynamic, and secure. It uses bytecode that is translated from Java code and interpreted by the Java Virtual Machine. Java can be used for applets, networking, internationalization, security, object serialization, and database connectivity. It is platform independent because Java code is compiled into bytecode that runs consistently on any Java platform. The document then discusses control flow statements, decision-making statements, operators, object-oriented principles of encapsulation, inheritance, and polymorphism, classes and objects, methods, access specifiers, and inheritance types in Java.
The document discusses method overloading and overriding in .NET. Method overloading allows a method to have the same name but different parameters within a class. Method overriding involves a subclass redefining a method from its parent class with the same name and parameters. The key differences are that overloading is resolved at compile-time based on parameters, while overriding is resolved at run-time based on the object's type. Overriding changes existing functionality, while overloading adds or extends functionality.
This document discusses procedures in Visual Basic .NET, including sub procedures, function procedures, property procedures, procedure overloading, procedure overriding, and built-in functions. It provides examples of sub procedures, function procedures, and explains how to pass arguments, use parameter arrays, overload and override procedures. The document also includes problem statements and tasks related to creating a customer data entry form with validation checks on customer ID and phone number.
This document discusses polymorphism in Java programs. Polymorphism refers to the ability of an object to take on multiple forms. In Java, polymorphism allows a reference variable to change behavior based on the object it is holding. There are three forms of polymorphism in Java: method overriding, overriding abstract methods of an abstract class, and implementing interface methods. Polymorphism provides benefits like simplicity and extensibility in code.
Polymorphism in java, method overloading and method overridingJavaTportal
Polymorphism come from the two Greek words ‘poly’ meaning many and ‘morphs” meaning forms. The ability to exist in different form is called polymorphism. The same variable or method can perform different tasks; the programmer has the advantage of writing flexible code.
This document discusses object-oriented programming concepts like inheritance, polymorphism, overloading, and overriding. It provides examples of inheritance hierarchies for different types of birds. Inheritance allows subclasses to inherit attributes and methods from parent classes. Polymorphism means an object can have different implementations of the same method depending on its type. Overloading and overriding relate to creating multiple methods with the same name that differ in parameters or implementation.
This document discusses polymorphism and inheritance concepts in Java. It defines polymorphism as an object taking on many forms, and describes method overloading and overriding. Method overloading allows classes to have multiple methods with the same name but different parameters. Method overriding allows subclasses to provide a specific implementation of a method in the parent class. The document also discusses abstract classes and interfaces for abstraction in Java, and explains access modifiers like public, private, protected, and default.
OOPs with Java - Packaging and Access Modifiers Hitesh-Java
In this core java training session, you will learn OOPs. Topics covered in this session are:
• Packaging Classes & Access Modifiers
For more information about this course visit on this link: https://www.mindsmapped.com/courses/software-development/learn-java-fundamentals-hands-on-training-on-core-java-concepts/
Java is an object-oriented programming language that is architecture-neutral, portable, distributed, high-performance, interpreted, multithreaded, robust, dynamic, and secure. It uses bytecode that is translated from Java code and interpreted by the Java Virtual Machine. Java can be used for applets, networking, internationalization, security, object serialization, and database connectivity. It is platform independent because Java code is compiled into bytecode that runs consistently on any Java platform. The document then discusses control flow statements, decision-making statements, operators, object-oriented principles of encapsulation, inheritance, and polymorphism, classes and objects, methods, access specifiers, and inheritance types in Java.
The document discusses method overloading and overriding in .NET. Method overloading allows a method to have the same name but different parameters within a class. Method overriding involves a subclass redefining a method from its parent class with the same name and parameters. The key differences are that overloading is resolved at compile-time based on parameters, while overriding is resolved at run-time based on the object's type. Overriding changes existing functionality, while overloading adds or extends functionality.
This document discusses procedures in Visual Basic .NET, including sub procedures, function procedures, property procedures, procedure overloading, procedure overriding, and built-in functions. It provides examples of sub procedures, function procedures, and explains how to pass arguments, use parameter arrays, overload and override procedures. The document also includes problem statements and tasks related to creating a customer data entry form with validation checks on customer ID and phone number.
Here is the Cuboid class with private instance variables, public volume() method, setter and getter methods as specified in the question:
public class Cuboid {
private double length;
private double breadth;
private double height;
public double volume() {
return length * breadth * height;
}
public boolean setLength(double len) {
if(len > 0) {
this.length = len;
return true;
}
return false;
}
public boolean setBreadth(double bre) {
if(bre > 0) {
this.breadth = bre;
return true;
}
return false;
}
public boolean setHeight(double hei
This document provides information about getting solved assignments from professionals and includes contact details. It then provides sample solutions to 6 questions covering topics like Object Oriented Programming, classes, interfaces, exceptions, multithreading, layout managers, events, streams, sockets and more. Solutions include code examples and explanations. The document serves as a reference for students seeking help on assignments.
Identifiers in Java refer to variables, methods, classes, packages and interfaces by name rather than being the things themselves. Parameters passed to methods are passed by value. A constructor creates an instance of a class by allocating memory and initializing the object. Packages in Java are used to organize related classes and interfaces and provide access protection.
This document summarizes key points from Chapter 4 of Effective Java on classes and interfaces. It discusses 19 items on best practices such as minimizing accessibility of classes and members, using accessor methods over public fields, favoring immutable classes, composition over inheritance, interfaces over abstract classes, and function objects to represent strategies. The document provides examples and explanations for each item.
Concurrency on the JVM showing the nuts and bolts of Akka (I presume .. it's not first-hand stuff I'm saying, just speculating). Java Memory Model, Thread Pools, Actors and the likes of that will be covered.
The document provides definitions and explanations of various object-oriented programming concepts in Delphi such as classes, objects, visibility of class members, inheritance, abstract classes, interfaces, constructors, virtual functions, polymorphism, late binding, encapsulation, properties, exceptions handling, and runtime type information (RTTI). It discusses these concepts through questions and answers. Key points covered include the relationship between classes and objects, differences between visibility levels of class members, how inheritance allows the creation of subclasses, rules around abstract classes and methods, limitations of interfaces, how to define and overload constructors and functions, use of virtual functions and polymorphism, and how RTTI is used.
Polymorphism is the ability of an object to take on many forms. The most common use of polymorphism in OOP occurs when a parent class reference is used to refer to a child class object. Any Java object that can pass more than one IS-A test is considered to be polymorphic.
The document discusses several key differences between programming concepts:
- Abstraction vs encapsulation focuses on design vs implementation levels and hiding unwanted vs internal details.
- Composition vs aggregation defines strong relationships where entities need each other vs weak relationships where entities can exist independently.
- Private classes are only accessible within their definition vs sealed classes which can be accessed by any class but not inherited from.
- Static classes contain only static members and no instances vs sealed classes which can contain static and nonstatic members and instances.
- Virtual methods allow overriding but not require it, while abstract methods require derived classes to override them.
In this core java training session, you will learn Inner Classes. Topics covered in this session are:
• Inner Classes
• Method-local Inner Class
• Anonymous Inner Class
• Static Nested Inner Class
For more information about this course visit on this link: https://www.mindsmapped.com/courses/software-development/learn-java-fundamentals-hands-on-training-on-core-java-concepts/
This document discusses concepts related to threads and concurrency in Java. It begins by defining processes and threads, explaining that processes contain threads. It then covers key threading concepts like thread pools, synchronization, and data management between threads. The document provides examples of why threads are used and best practices for writing threaded code in Java. It also discusses common threading issues like deadlocks and race conditions and how to avoid them.
Java provides four access modifiers - public, default, protected, and private - to control access to classes, variables, methods, and constructors. Public members can be accessed from anywhere, default is accessible within the same package, protected is accessible within subclasses in different packages or within the same package, and private is only accessible within the class itself. The document then provides examples of each access modifier and notes inheritance rules for access levels.
This document discusses Java threads and multithreaded programming. It covers defining and creating threads, controlling thread execution, sharing data between threads, and communicating between threads using wait and notify. Key points include extending the Thread class or implementing Runnable to create threads, starting threads with the start() method, and using synchronized to protect shared data from corruption when accessed by multiple threads.
Session 11 - OOP's with Java - Packaging and Access ModifiersPawanMM
This document provides an agenda and overview of topics for a Java & JEE training session on OOP concepts including packaging classes, access modifiers, and encapsulation. The session will review interfaces vs abstract classes, static methods, and method overriding vs hiding. It will then cover defining packages in Java, accessing packages, and package rules. Finally, it discusses the private, default, protected, and public access modifiers and their usage, as well as overriding rules and an example of encapsulation using Java beans.
Introduction to OOPS : Problems in procedure oriented approach, Features of Object Oriented
Programming System, Object creation, Initializing the instance variable, Constructors.
Inter thread communication & runnable interfacekeval_thummar
Inter-thread communication allows threads to pause execution in critical sections and allow other threads to enter those sections. It uses the wait(), notify(), and notifyAll() methods of the Object class. wait() pauses a thread until another calls notify() or notifyAll(), notify() wakes one waiting thread, and notifyAll() wakes all waiting threads. The Runnable interface provides a common protocol for objects to execute code while active. To create a thread using Runnable, a class implements Runnable and defines a run() method, a Thread object is created passing the Runnable, and start() is called to execute run().
This document discusses polymorphism and object-oriented programming concepts. It begins by introducing polymorphism and how it allows the same method invocation to produce different results depending on the object type. It then discusses abstract classes and interfaces, explaining that abstract classes declare common attributes and behaviors for subclasses to implement, while interfaces define common method signatures without implementation. The document provides examples of polymorphism in class hierarchies, demonstrating how invoking methods through a superclass reference causes the correct subclass version to be called based on the object's type.
The document discusses casting and conversion in Java. It covers implicit and explicit type conversions, including widening, narrowing, and casting conversions. It also discusses overloading constructors in Java by defining multiple constructor methods with the same name but different parameters. The document provides examples of casting integer and double values to byte type, as well as overloading the Cuboid constructor to calculate volumes for rectangles and squares.
The document discusses inheritance and interfaces in Java. It explains that inheritance allows a subclass to inherit data members and methods from a superclass. It also describes method overriding, where a subclass overrides a method from the superclass with the same signature. The document also discusses interfaces, which define a common behavior for multiple classes to implement, allowing for multiple inheritance in Java.
Here is the Cuboid class with private instance variables, public volume() method, setter and getter methods as specified in the question:
public class Cuboid {
private double length;
private double breadth;
private double height;
public double volume() {
return length * breadth * height;
}
public boolean setLength(double len) {
if(len > 0) {
this.length = len;
return true;
}
return false;
}
public boolean setBreadth(double bre) {
if(bre > 0) {
this.breadth = bre;
return true;
}
return false;
}
public boolean setHeight(double hei
This document provides information about getting solved assignments from professionals and includes contact details. It then provides sample solutions to 6 questions covering topics like Object Oriented Programming, classes, interfaces, exceptions, multithreading, layout managers, events, streams, sockets and more. Solutions include code examples and explanations. The document serves as a reference for students seeking help on assignments.
Identifiers in Java refer to variables, methods, classes, packages and interfaces by name rather than being the things themselves. Parameters passed to methods are passed by value. A constructor creates an instance of a class by allocating memory and initializing the object. Packages in Java are used to organize related classes and interfaces and provide access protection.
This document summarizes key points from Chapter 4 of Effective Java on classes and interfaces. It discusses 19 items on best practices such as minimizing accessibility of classes and members, using accessor methods over public fields, favoring immutable classes, composition over inheritance, interfaces over abstract classes, and function objects to represent strategies. The document provides examples and explanations for each item.
Concurrency on the JVM showing the nuts and bolts of Akka (I presume .. it's not first-hand stuff I'm saying, just speculating). Java Memory Model, Thread Pools, Actors and the likes of that will be covered.
The document provides definitions and explanations of various object-oriented programming concepts in Delphi such as classes, objects, visibility of class members, inheritance, abstract classes, interfaces, constructors, virtual functions, polymorphism, late binding, encapsulation, properties, exceptions handling, and runtime type information (RTTI). It discusses these concepts through questions and answers. Key points covered include the relationship between classes and objects, differences between visibility levels of class members, how inheritance allows the creation of subclasses, rules around abstract classes and methods, limitations of interfaces, how to define and overload constructors and functions, use of virtual functions and polymorphism, and how RTTI is used.
Polymorphism is the ability of an object to take on many forms. The most common use of polymorphism in OOP occurs when a parent class reference is used to refer to a child class object. Any Java object that can pass more than one IS-A test is considered to be polymorphic.
The document discusses several key differences between programming concepts:
- Abstraction vs encapsulation focuses on design vs implementation levels and hiding unwanted vs internal details.
- Composition vs aggregation defines strong relationships where entities need each other vs weak relationships where entities can exist independently.
- Private classes are only accessible within their definition vs sealed classes which can be accessed by any class but not inherited from.
- Static classes contain only static members and no instances vs sealed classes which can contain static and nonstatic members and instances.
- Virtual methods allow overriding but not require it, while abstract methods require derived classes to override them.
In this core java training session, you will learn Inner Classes. Topics covered in this session are:
• Inner Classes
• Method-local Inner Class
• Anonymous Inner Class
• Static Nested Inner Class
For more information about this course visit on this link: https://www.mindsmapped.com/courses/software-development/learn-java-fundamentals-hands-on-training-on-core-java-concepts/
This document discusses concepts related to threads and concurrency in Java. It begins by defining processes and threads, explaining that processes contain threads. It then covers key threading concepts like thread pools, synchronization, and data management between threads. The document provides examples of why threads are used and best practices for writing threaded code in Java. It also discusses common threading issues like deadlocks and race conditions and how to avoid them.
Java provides four access modifiers - public, default, protected, and private - to control access to classes, variables, methods, and constructors. Public members can be accessed from anywhere, default is accessible within the same package, protected is accessible within subclasses in different packages or within the same package, and private is only accessible within the class itself. The document then provides examples of each access modifier and notes inheritance rules for access levels.
This document discusses Java threads and multithreaded programming. It covers defining and creating threads, controlling thread execution, sharing data between threads, and communicating between threads using wait and notify. Key points include extending the Thread class or implementing Runnable to create threads, starting threads with the start() method, and using synchronized to protect shared data from corruption when accessed by multiple threads.
Session 11 - OOP's with Java - Packaging and Access ModifiersPawanMM
This document provides an agenda and overview of topics for a Java & JEE training session on OOP concepts including packaging classes, access modifiers, and encapsulation. The session will review interfaces vs abstract classes, static methods, and method overriding vs hiding. It will then cover defining packages in Java, accessing packages, and package rules. Finally, it discusses the private, default, protected, and public access modifiers and their usage, as well as overriding rules and an example of encapsulation using Java beans.
Introduction to OOPS : Problems in procedure oriented approach, Features of Object Oriented
Programming System, Object creation, Initializing the instance variable, Constructors.
Inter thread communication & runnable interfacekeval_thummar
Inter-thread communication allows threads to pause execution in critical sections and allow other threads to enter those sections. It uses the wait(), notify(), and notifyAll() methods of the Object class. wait() pauses a thread until another calls notify() or notifyAll(), notify() wakes one waiting thread, and notifyAll() wakes all waiting threads. The Runnable interface provides a common protocol for objects to execute code while active. To create a thread using Runnable, a class implements Runnable and defines a run() method, a Thread object is created passing the Runnable, and start() is called to execute run().
This document discusses polymorphism and object-oriented programming concepts. It begins by introducing polymorphism and how it allows the same method invocation to produce different results depending on the object type. It then discusses abstract classes and interfaces, explaining that abstract classes declare common attributes and behaviors for subclasses to implement, while interfaces define common method signatures without implementation. The document provides examples of polymorphism in class hierarchies, demonstrating how invoking methods through a superclass reference causes the correct subclass version to be called based on the object's type.
The document discusses casting and conversion in Java. It covers implicit and explicit type conversions, including widening, narrowing, and casting conversions. It also discusses overloading constructors in Java by defining multiple constructor methods with the same name but different parameters. The document provides examples of casting integer and double values to byte type, as well as overloading the Cuboid constructor to calculate volumes for rectangles and squares.
The document discusses inheritance and interfaces in Java. It explains that inheritance allows a subclass to inherit data members and methods from a superclass. It also describes method overriding, where a subclass overrides a method from the superclass with the same signature. The document also discusses interfaces, which define a common behavior for multiple classes to implement, allowing for multiple inheritance in Java.
- Java was developed by Sun Microsystems in 1991 as a portable language that could run on different platforms. It was initially called Oak but later renamed to Java.
- The Java Virtual Machine (JVM) performs garbage collection to free memory from objects that are no longer in use. Different approaches like reference counting and tracing are used to detect garbage objects.
- The CLASSPATH environment variable instructs the JVM on finding classes. It can be set to include classpaths when using Java tools like java, javac, and javadoc.
In this session you will learn:
Implement classes and objects in Java
Create class constructors
Overload constructors
Inherit classes and create sub-classes
Implement abstract classes and methods
Use static keyword
For more information: https://www.mindsmapped.com/courses/software-development/become-a-java-developer-hands-on-training/
chapter 5 concepts of object oriented programmingWondimuBantihun1
The document discusses the basic concepts of object-oriented programming in Java, including objects, classes, abstraction, encapsulation, inheritance, and polymorphism. It provides examples of objects versus classes, creating objects, access modifiers, constructors, encapsulation with getter and setter methods, single inheritance, abstract classes and interfaces for abstraction, and method overloading and overriding for polymorphism.
The document discusses various topics related to object-oriented programming and .NET Framework development. It introduces goals of the .NET Framework like support of industry standards, extensibility, unified programming models, and improved memory and security models. It also covers topics like assemblies, namespaces, inheritance, polymorphism, exceptions, collections, and data access using ADO.NET. The document discusses Windows Presentation Foundation (WPF) and web application development concepts like controls, data binding, templates, page and control events, and data-bound web controls.
This document provides an overview of Java fundamentals including classes, objects, encapsulation, abstraction, inheritance, polymorphism and other core OOP concepts. Key points covered include:
- Classes contain variable declarations and method definitions while objects have state, behavior and identity.
- Encapsulation is achieved by declaring class variables as private and providing public get and set methods.
- Abstraction hides certain details and shows only essential information to the user using abstract classes and interfaces.
- Inheritance allows classes to extend functionality from other classes in a hierarchical manner to achieve code reuse.
- Polymorphism allows a single action to be performed in different ways depending on the object used.
Some of the common interview questions asked during a Java Interview. These may apply to Java Interviews. Be prepared with answers for the interview questions below when you prepare for an interview. Also have an example to explain how you worked on various interview questions asked below. Java Developers are expected to have references and be able to explain from their past experiences. All the Best for a successful career as a Java Developer!
This document provides a summary of 50 common Java interview questions related to core Java concepts like JDK vs JVM, Java memory segments, Java bytecode, inheritance, abstraction, polymorphism, exceptions, threads, collections, and more. For each question, it provides a detailed explanation of the concept in 2-3 sentences. This serves as a good reference for Java developers to review core Java concepts frequently asked during interviews.
This document provides an overview of key concepts covered in the Sun Certified Java Programmer (SCJP) 1.4 exam, including:
- Arrays in Java - how to declare, construct, initialize, and access array elements.
- Class modifiers like public, private, protected that restrict access, and final that prevents subclassing. Method and variable modifiers like static, abstract, synchronized are also discussed.
- Constructors - how they are invoked using this() and super(), default constructors, and cases where a default constructor is not provided by the compiler.
The document gives examples of each concept and is intended to help readers prepare for the SCJP certification exam by learning about its main objectives
Abstract Class In Java | Java Abstract Class Tutorial | Java Tutorial For Beg...Simplilearn
Abstraction is one of the keys to achieving the Object-Oriented Programming approach to design, develop, and deploy software. This technique is really important and many developed intend to have a strong grip on it. This video will give you an idea about the best practices and suggestions that could help you to use abstract classes in Java.
About Simplilearn Java certification training course:
If you’re looking to master web application development for virtually any computing platform, this Java Certification Training course is for you. This all-in-one Java training will give you a firm foundation in Java, the most commonly used programming language in software development.
This advanced Java Certification Training course is designed to guide you through the concepts of Java from introductory techniques to advanced programming skills. The course will provide you with the knowledge of Core Java 8, operators, arrays, loops, methods, and constructors while giving you hands-on experience in JDBC and JUnit framework.
Java Certification Course Key Features:
1. 70 hours of blended training
2. Hands-on coding and implementation of two web-based projects
3. Includes Hibernate and Spring frameworks
4. 35 coding-related exercises on Core Java 8
5. Lifetime access to self-paced learning
6. Flexibility to choose classes
Eligibility:
Simplilearn’s Java Certification Training course is ideal for software developers, web designers, programming enthusiasts, engineering graduates, and students or professionals who wish to become Java developers.
Pre-requisites:
Prior knowledge of Core Java is a prerequisite to taking this advanced Java Certification training course. Our Core Java online self-paced course is available for free to become familiar with the basics of Java programming.
Learn more at: https://bit.ly/3b6SCvp
Refactoring is the process of changing a software system in such a way that it does not alter the external behavior of the code yet improves its internal structure
This document discusses exception handling in .NET. It defines what exceptions are, how they are handled using try, catch, and finally blocks, and common exception types in .NET like IndexOutOfRangeException and NullReferenceException. It explains that exceptions allow error handling code to be separated from the main program logic and that finally blocks ensure cleanup code is always executed.
OCP Java (OCPJP) 8 Exam Quick Reference CardHari kiran G
If you are preparing to appear for Oracle Certified Professional Java SE 8 Programmer (OCPJP 8) certification exam, this a reference card (sort of long cheat sheet) meant to help you. You may want to print this reference card for your easy and quick reference when you prepare for your exam.
The document provides an overview of key Java programming concepts including final classes and methods, enumerated types, static imports, abstract classes and interfaces, exceptions, assertions, and creating custom exceptions. It discusses how to use these concepts and includes code examples.
This document discusses exception handling in .NET. It defines what exceptions are, how they are handled using try, catch, and finally blocks, and common exception types in .NET. The main points covered are:
- Exceptions are events that disrupt normal program flow due to errors.
- try and catch blocks allow handling exceptions, while finally ensures cleanup code runs.
- Common .NET exceptions inherit from System.Exception.
- Exceptions simplify error handling and make applications more robust.
This document discusses object-oriented programming concepts including inheritance, polymorphism, interfaces, and abstract classes/methods. Inheritance allows a derived class to extend a base class, adding new properties and methods. Polymorphism enables an object to take on multiple forms through method overriding. Interfaces specify methods a class must implement, while abstract classes can contain abstract methods without implementation and both cannot be instantiated. The document provides examples and definitions of these concepts.
Hooks are functions that allow you to "hook into" React state and lifecycle features from function components. There are three main rules for using hooks: only call them at the top level, only from React functions, and you can call them from custom hooks. Hooks help solve issues with class components by allowing stateful logic to be reused without changing component hierarchy and making complex components easier to understand and test. While hooks provide benefits, there is no need to immediately use them everywhere and classes will continue to be supported.
Abstraction in Java: Abstract class and InterfacesJamsher bhanbhro
In my presentation titled "Abstraction in Java," I have discussed the fundamental concept of abstraction in Java programming. The presentation delves into how abstraction is a key principle in object-oriented programming, explaining its role in hiding the complexity of code while exposing only the necessary details. It includes examples and explanations on implementing abstraction in Java, offering a clear understanding for both beginners and intermediate learners. This presentation serves as an educational guide for those interested in enhancing their Java programming skills and understanding the practical applications of abstraction in software development.
The document discusses legacy connectivity and protocols. It describes legacy integration as integrating J2EE components with legacy systems. The key approaches to legacy integration are data level integration, application interface integration, method level integration, and user interface level integration. Legacy connectivity can be achieved using Java Native Interface (JNI), J2EE Connector Architecture, and web services. JNI allows Java code to call native methods written in other languages like C/C++. The J2EE Connector Architecture standardizes connectivity through resource adapters. Web services provide a platform-independent approach through XML protocols.
The document discusses messaging and internationalization. It covers messaging using Java Message Service (JMS), including the need for messaging, messaging architecture, types of messaging, messaging models, messaging servers, components of a JMS application, developing effective messaging solutions, and implementing JMS. It also discusses internationalizing J2EE applications.
The document discusses Java 2 Enterprise Edition (J2EE) application security. It covers security threat assessment, the Java 2 security model, and Java security APIs. The Java 2 security model provides access controls and allows downloading and running applications securely. It uses techniques like cryptography, digital signatures, and SSL. The Java Cryptography Extensions API provides methods for encrypting data, generating keys, and authentication.
The document discusses various security tools in Java including keytool, jarsigner, and policytool. Keytool is used to manage keystores containing private keys and certificates. It can generate key pairs, import/export certificates, and list keystore contents. Jarsigner signs JAR files using certificates from a keystore. Policytool creates and edits security policy files specifying user permissions. The document provides details on using each tool's commands and options.
This document discusses EJB technology and provides summaries of key concepts:
1. It defines the EJB container model and describes features like security, distributed access, and lifecycle management.
2. It compares the lifecycles of stateless session beans, stateful session beans, entity beans, and message-driven beans.
3. It contrasts stateful and stateless session beans and discusses differences in client state, pooling, lifecycles, and more. It also compares session beans and entity beans in terms of representing processes versus data.
This document discusses behavioral design patterns and J2EE design patterns. It provides descriptions and class diagrams for several behavioral patterns, including Iterator, Mediator, Memento, Observer, State, Strategy, Template Method, and Visitor. It also defines what a J2EE design pattern is and notes that J2EE patterns are categorized into the presentation, business, and integration tiers of an enterprise application.
This document provides an overview of EJB in J2EE architecture and EJB design patterns. It discusses the key characteristics of using EJB in J2EE architecture, including supporting multiple clients, improving reliability and productivity, supporting large scale deployment, developing transactional applications, and implementing security. It also outlines several EJB design patterns, such as client-side interaction patterns, EJB layer architectural patterns, inter-tier data transfer patterns, and transaction/persistence patterns.
This document discusses design patterns and provides examples of structural and behavioral design patterns. It describes the adapter, bridge, composite, decorator, facade, flyweight, proxy, chain of responsibility, and command patterns. Structural patterns are concerned with relationships and responsibilities between objects, while behavioral patterns focus on communication between objects. Examples of UML diagrams are provided to illustrate how each pattern can be modeled.
The document discusses UML diagrams that can be used to model J2EE applications, including use case diagrams, class diagrams, package diagrams, sequence diagrams, collaboration diagrams, state diagrams, activity diagrams, component diagrams, and deployment diagrams. It provides examples of each diagram type using a case study of an online bookstore system. The use case diagram shows use cases and actors, the class diagram shows classes and relationships, and other diagrams demonstrate how specific interactions, workflows, and system configurations can be modeled through different UML diagrams.
This document discusses design patterns and selecting appropriate patterns based on business requirements. It provides an overview of design patterns available in TheServerSide.com pattern catalog, which are organized into categories like EJB layer architectural patterns, inter-tier data transfer patterns, transaction and persistence patterns, and client-side EJB interaction patterns. Examples of patterns in each category are described. Best practices for developing class diagrams and using proven design patterns are also mentioned.
This document provides an overview of J2EE architecture. It defines architecture as the study of designing J2EE applications and discusses architectural concepts like attributes, models, and terminology. It describes the role of an architect and phases of architectural design. The document outlines the various components of J2EE like clients, web components, business components and containers. It also discusses key aspects of J2EE architecture like application areas, issues, technologies and available application servers.
The document discusses various topics related to collaboration and distributed systems including network communication in distributed environments, application integration using XML, and legacy integration technologies. Specifically, it covers factors that affect network performance like bandwidth and latency. It also describes using XML for data mapping between applications and data stores. Finally, it discusses different legacy integration methods like screen scraping, object mapping tools, and using off-board servers.
The document discusses JavaBean properties, property editors, and the classes used to implement them in Java. It describes the PropertyEditorSupport class and its methods for creating customized property editors. The PropertyDescriptor class and BeanInfo interface provide information about JavaBean properties, events, and methods. The document also provides tips on using sample JavaBeans from BDK1.1 in Java 2 SDK and creating a manifest file for multiple JavaBeans. Common questions about JavaBeans are answered.
The document discusses JavaBean properties and custom events. It defines different types of JavaBean properties like simple, boolean, indexed, bound, and constrained properties. It also explains how to create custom events by defining an event class, event listener interface, and event handler. The event handler notifies listeners when an event occurs. Finally, it demonstrates creating a login JavaBean that uses a custom event to validate that a username and password are not the same.
The document introduces JavaBeans, which are reusable software components created using Java. It discusses JavaBean concepts like properties, methods, and events. It also describes the Beans Development Kit (BDK) environment for creating, configuring, and testing JavaBeans. BDK includes components like the ToolBox, BeanBox, Properties window, and Method Tracer window. The document provides demonstrations of creating a sample JavaBean applet and user-defined JavaBean using BDK. It also covers topics like creating manifest and JAR files for packaging JavaBeans.
The document provides information on working with joins, the JDBC API, and isolation levels in Java database applications. It discusses different types of joins like inner joins, cross joins, and outer joins. It describes the key interfaces in the JDBC API like Statement, PreparedStatement, ResultSet, Connection, and DatabaseMetaData. It also covers isolation levels and how they prevent issues with concurrently running transactions accessing a database.
The document discusses various advanced features of JDBC including using prepared statements, managing transactions, performing batch updates, and calling stored procedures. Prepared statements improve performance by compiling SQL statements only once. Transactions allow grouping statements to execute atomically through commit and rollback. Batch updates reduce network calls by executing multiple statements as a single unit. Stored procedures are called using a CallableStatement object which can accept input parameters and return output parameters.
The document introduces JDBC and its key concepts. It discusses the JDBC architecture with two layers - the application layer and driver layer. It describes the four types of JDBC drivers and how they work. The document outlines the classes and interfaces that make up the JDBC API and the basic steps to create a JDBC application, including loading a driver, connecting to a database, executing statements, and handling exceptions. It provides examples of using JDBC to perform common database operations like querying, inserting, updating, and deleting data.
The document discusses classes and objects in Java, including defining classes with data members and methods, creating objects, using constructors, and the structure of a Java application. It also covers access specifiers, modifiers, compiling Java files, and provides a summary of key points about classes and objects in Java.
The document discusses operators in Java, including unary, binary, arithmetic, bitwise, shift, and instanceof operators. It provides examples of how to use various operators like increment, decrement, arithmetic assignment, bitwise AND, OR, NOT, XOR, right shift, left shift, and unsigned shift. It also covers operator precedence and demonstrates how operators in an expression are evaluated based on their predetermined precedence order.
Unlocking Productivity: Leveraging the Potential of Copilot in Microsoft 365, a presentation by Christoforos Vlachos, Senior Solutions Manager – Modern Workplace, Uni Systems
Threats to mobile devices are more prevalent and increasing in scope and complexity. Users of mobile devices desire to take full advantage of the features
available on those devices, but many of the features provide convenience and capability but sacrifice security. This best practices guide outlines steps the users can take to better protect personal devices and information.
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.
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.
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
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.
Communications Mining Series - Zero to Hero - Session 1DianaGray10
This session provides introduction to UiPath Communication Mining, importance and platform overview. You will acquire a good understand of the phases in Communication Mining as we go over the platform with you. Topics covered:
• Communication Mining Overview
• Why is it important?
• How can it help today’s business and the benefits
• Phases in Communication Mining
• Demo on Platform overview
• Q/A
Securing your Kubernetes cluster_ a step-by-step guide to success !KatiaHIMEUR1
Today, after several years of existence, an extremely active community and an ultra-dynamic ecosystem, Kubernetes has established itself as the de facto standard in container orchestration. Thanks to a wide range of managed services, it has never been so easy to set up a ready-to-use Kubernetes cluster.
However, this ease of use means that the subject of security in Kubernetes is often left for later, or even neglected. This exposes companies to significant risks.
In this talk, I'll show you step-by-step how to secure your Kubernetes cluster for greater peace of mind and reliability.
For the full video of this presentation, please visit: https://www.edge-ai-vision.com/2024/06/building-and-scaling-ai-applications-with-the-nx-ai-manager-a-presentation-from-network-optix/
Robin van Emden, Senior Director of Data Science at Network Optix, presents the “Building and Scaling AI Applications with the Nx AI Manager,” tutorial at the May 2024 Embedded Vision Summit.
In this presentation, van Emden covers the basics of scaling edge AI solutions using the Nx tool kit. He emphasizes the process of developing AI models and deploying them globally. He also showcases the conversion of AI models and the creation of effective edge AI pipelines, with a focus on pre-processing, model conversion, selecting the appropriate inference engine for the target hardware and post-processing.
van Emden shows how Nx can simplify the developer’s life and facilitate a rapid transition from concept to production-ready applications.He provides valuable insights into developing scalable and efficient edge AI solutions, with a strong focus on practical implementation.
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.
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:
Cosa hanno in comune un mattoncino Lego e la backdoor XZ?Speck&Tech
ABSTRACT: A prima vista, un mattoncino Lego e la backdoor XZ potrebbero avere in comune il fatto di essere entrambi blocchi di costruzione, o dipendenze di progetti creativi e software. La realtà è che un mattoncino Lego e il caso della backdoor XZ hanno molto di più di tutto ciò in comune.
Partecipate alla presentazione per immergervi in una storia di interoperabilità, standard e formati aperti, per poi discutere del ruolo importante che i contributori hanno in una comunità open source sostenibile.
BIO: Sostenitrice del software libero e dei formati standard e aperti. È stata un membro attivo dei progetti Fedora e openSUSE e ha co-fondato l'Associazione LibreItalia dove è stata coinvolta in diversi eventi, migrazioni e formazione relativi a LibreOffice. In precedenza ha lavorato a migrazioni e corsi di formazione su LibreOffice per diverse amministrazioni pubbliche e privati. Da gennaio 2020 lavora in SUSE come Software Release Engineer per Uyuni e SUSE Manager e quando non segue la sua passione per i computer e per Geeko coltiva la sua curiosità per l'astronomia (da cui deriva il suo nickname deneb_alpha).
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