The document provides information about reading and writing text files in .NET using streams. It discusses the StreamReader and StreamWriter classes for reading and writing text files respectively. It also covers handling exceptions that can occur during input/output operations like file not found errors. Examples are given to demonstrate reading a text file line by line, writing numbers to a file, and fixing timing offsets in movie subtitle files.
The document discusses reading and writing text files in .NET. It introduces streams and the StreamReader and StreamWriter classes for reading and writing files. It covers reading and writing files line-by-line, handling exceptions, and provides examples for reading a text file, writing numbers to a file, and fixing subtitles timing in a file. The document aims to explain the basics of working with text files in .NET.
This document discusses input/output streams, error handling, and passing command line arguments in Java. It covers the basics of reading from and writing to files, the console, and networks using input/output streams. It also discusses how to handle exceptions using try/catch blocks and how to pass command line arguments to a Java program that will be stored in the main method's String array.
This document provides an overview of Java I/O including different types of I/O, how Java supports I/O through streams and classes like File, serialization, compression, Console, and Properties. It discusses byte and character streams, buffered streams, reading/writing files, and preferences. Key points are that Java I/O uses streams as an abstraction, byte streams operate on bytes while character streams use characters, and buffered streams improve efficiency by buffering reads/writes.
The document discusses input/output streams in Java. It covers:
- Different types of data storage including transient RAM and persistent storage like disks.
- I/O sources and destinations like consoles, disks, networks etc. and how streams represent sequential bytes to abstract I/O details.
- Common Java I/O stream classes like FileReader, FileWriter, InputStream and OutputStream for reading/writing text and binary data from files.
- Using File class to represent files and directories with methods to check attributes, read content and manipulate files.
This chapter discusses various methods of file input and output in Java, including low-level file I/O using FileInputStream and FileOutputStream, high-level file I/O using DataInputStream and DataOutputStream to read and write primitive data types, reading and writing text files using PrintWriter, BufferedReader, and Scanner, and object file I/O using ObjectInputStream and ObjectOutputStream to save and load objects. It also covers using JFileChooser to allow users to select files and applying file filters.
The document discusses files, streams, and different classes in Java for reading and writing files and streams. It explains that files exist on a local file system while streams represent a flow of characters. It also discusses the process of opening, reading from, and closing files, as well as using classes like FileReader, FileWriter, FileInputStream and FileOutputStream for reading/writing characters and bytes. It recommends using BufferedReader and BufferedWriter for more efficient reading of lines and writing of strings.
The document discusses various Java I/O stream classes:
- FileInputStream and FileOutputStream are used for reading and writing raw bytes to files.
- InputStreamReader and OutputStreamWriter bridge byte streams to character streams using a specified character encoding.
- FileReader and FileWriter are built on top of InputStreamReader and OutputStreamWriter respectively, and are used for reading and writing character streams from files.
The document discusses reading and writing text files in .NET. It introduces streams and the StreamReader and StreamWriter classes for reading and writing files. It covers reading and writing files line-by-line, handling exceptions, and provides examples for reading a text file, writing numbers to a file, and fixing subtitles timing in a file. The document aims to explain the basics of working with text files in .NET.
This document discusses input/output streams, error handling, and passing command line arguments in Java. It covers the basics of reading from and writing to files, the console, and networks using input/output streams. It also discusses how to handle exceptions using try/catch blocks and how to pass command line arguments to a Java program that will be stored in the main method's String array.
This document provides an overview of Java I/O including different types of I/O, how Java supports I/O through streams and classes like File, serialization, compression, Console, and Properties. It discusses byte and character streams, buffered streams, reading/writing files, and preferences. Key points are that Java I/O uses streams as an abstraction, byte streams operate on bytes while character streams use characters, and buffered streams improve efficiency by buffering reads/writes.
The document discusses input/output streams in Java. It covers:
- Different types of data storage including transient RAM and persistent storage like disks.
- I/O sources and destinations like consoles, disks, networks etc. and how streams represent sequential bytes to abstract I/O details.
- Common Java I/O stream classes like FileReader, FileWriter, InputStream and OutputStream for reading/writing text and binary data from files.
- Using File class to represent files and directories with methods to check attributes, read content and manipulate files.
This chapter discusses various methods of file input and output in Java, including low-level file I/O using FileInputStream and FileOutputStream, high-level file I/O using DataInputStream and DataOutputStream to read and write primitive data types, reading and writing text files using PrintWriter, BufferedReader, and Scanner, and object file I/O using ObjectInputStream and ObjectOutputStream to save and load objects. It also covers using JFileChooser to allow users to select files and applying file filters.
The document discusses files, streams, and different classes in Java for reading and writing files and streams. It explains that files exist on a local file system while streams represent a flow of characters. It also discusses the process of opening, reading from, and closing files, as well as using classes like FileReader, FileWriter, FileInputStream and FileOutputStream for reading/writing characters and bytes. It recommends using BufferedReader and BufferedWriter for more efficient reading of lines and writing of strings.
The document discusses various Java I/O stream classes:
- FileInputStream and FileOutputStream are used for reading and writing raw bytes to files.
- InputStreamReader and OutputStreamWriter bridge byte streams to character streams using a specified character encoding.
- FileReader and FileWriter are built on top of InputStreamReader and OutputStreamWriter respectively, and are used for reading and writing character streams from files.
This document provides an overview of Java input/output (I/O) concepts including reading from and writing to the console, files, and streams. It discusses different I/O stream classes like PrintStream, InputStream, FileReader, FileWriter, BufferedReader, and how to read/write characters, bytes and objects in Java. The document also introduces new I/O features in Java 7 like try-with-resources for automatic resource management.
The document discusses techniques, challenges, and best practices for handling input/output (I/O) operations in Java. It covers the different types of I/O, how Java supports I/O through streams and readers/writers, issues with streams, alternatives like NIO that support non-blocking I/O using buffers and channels, and "Hiranya's Laws" with guidelines for proper I/O handling.
The document discusses various Java I/O streams including input streams, output streams, byte streams, character streams, buffered streams, properties class, print stream, file locking, serialization and print writer class. It provides examples of reading and writing files using FileInputStream, FileOutputStream, FileReader, FileWriter and other stream classes. Methods of different stream classes are also explained along with their usage.
The document discusses input/output files in Java. It covers the key classes used for reading and writing files in Java, including FileInputStream, FileOutputStream, FileReader, and FileWriter. It also discusses byte streams versus character streams, and provides examples of reading and writing to files in Java using these classes. Standard input/output streams like System.in and System.out are also covered.
The document discusses Java streams and I/O. It defines streams as abstract representations of input/output devices that are sources or destinations of data. It describes byte and character streams, the core stream classes in java.io, predefined System streams, common stream subclasses, reading/writing files and binary data with byte streams, and reading/writing characters with character streams. It also covers object serialization/deserialization and compressing files with GZIP.
This document discusses input and output streams in Java. It defines input streams as streams that receive or read data, and output streams as streams that send or write data. It classifies streams as byte streams, which transfer data as individual bytes and can be used for any file type, and text streams, which transfer data as characters and can only be used for text files. Examples of input and output streams are provided. The document also provides an example of using a FileOutputStream to write text to a file from the keyboard, and an example of using a FileInputStream to read text from that file.
The document discusses advanced input/output (I/O) streams in Java, including character and byte streams, input/output streams, node and filter streams, serialization, and common stream classes like File, Reader, Writer, InputStream, and OutputStream. Key methods for reading, writing, serialization, and deserialization are also summarized.
The document discusses input and output streams in Java. It describes the BufferedReader class, which reads text from a character input stream and buffers it for efficient reading. It also discusses the Scanner class in Java's util package for reading user input through the keyboard. An example program is provided that uses Scanner to read integer and float values from the user and calculate their sum.
This document discusses Java I/O and streams. It begins by introducing files and the File class, which provides methods for obtaining file properties and manipulating files. It then discusses reading and writing files using byte streams like FileInputStream and FileOutputStream. Character streams like PrintWriter and BufferedReader are presented for console I/O. Other stream classes covered include buffered streams, object streams for serialization, and data streams for primitive types. The key methods of various stream classes are listed.
The document discusses files and streams in C++. It defines files as sequences of bytes that end with an end-of-file marker. Streams are used to connect programs to files for input and output. There are standard input and output streams (cin and cout) as well as file streams that use classes like ifstream for input and ofstream for output. Files can be accessed sequentially or randomly - sequential files are read from start to finish while random access files allow direct access to any record.
This document provides an overview of Java input-output (I/O) streams and classes. It discusses the core stream classes like InputStream, OutputStream, Reader, Writer and their subclasses like FileInputStream, FileOutputStream, FileReader, FileWriter. It also covers buffered stream classes like BufferedInputStream, BufferedOutputStream, BufferedReader, BufferedWriter which provide better performance. Examples are given to demonstrate reading, writing and file handling using these stream classes.
Java uses streams to handle input/output operations. Streams provide a standardized way to read from and write to various sources and sinks like files, networks, and buffers. There are byte streams that handle input/output of bytes and character streams that handle characters. Common stream classes include FileInputStream, FileOutputStream, BufferedReader, and BufferedWriter which are used to read from and write to files and console. Streams can be chained together for complex I/O processing.
Streams are used to transfer data between a program and source/destination. They transfer data independently of the source/destination. Streams are classified as input or output streams depending on the direction of data transfer, and as byte or character streams depending on how the data is carried. Common stream classes in Java include FileInputStream, FileOutputStream, FileReader, and FileWriter for reading from and writing to files. Exceptions like FileNotFoundException may occur if a file cannot be opened.
This document discusses the differences between C, C++ and Java programming languages. It notes that Java is a purely object-oriented language, unlike C and C++ which also support procedural programming. Java is platform independent unlike C and C++. The document also discusses how Java is strongly associated with the internet and world wide web, enabling the creation of interactive applets and incorporation of animations into web pages. Finally, it provides a brief overview of how web browsers function by requesting and displaying web page content from servers.
The document discusses file input/output (IO) in Java. It covers key concepts like streams, files, the File class, and IO classes. The File class represents file and directory pathnames and is used to get file information. Streams are used for IO and can be byte-based or character-based. The File class has methods for renaming, deleting, and getting attributes of files. Sample programs demonstrate using the File class to rename and delete files. The document also outlines the main abstract stream classes in Java for input, output, readers and writers.
This document discusses Java file input/output and streams. It covers the core stream classes like InputStream, OutputStream, Reader and Writer and their subclasses. File and FileInputStream/FileOutputStream allow working with files and directories on the file system. The key abstraction is streams, which are linked to physical devices and provide a way to send and receive data through classes that perform input or output of bytes or characters.
The document discusses Java I/O and provides an overview of key concepts like streams, readers/writers, files, serialization, and tokenization. It describes the different types of input/output streams, readers, and writers in Java and best practices for working with them. Examples are provided to demonstrate reading from and writing to files, streams, and using serialization and tokenization.
Files are used to store data permanently. C++ provides the fstream, ifstream, and ofstream classes to handle file input/output. These classes allow you to open, read, write, and close files. The key file operations in C++ are open() to create or open a file, read() and write() to input and output data, and close() to finalize changes and release resources. A program example is given that takes user input, stores it in a text file, then reads and displays the data.
Propuestas del consejo de administración de SniaceDiego Gutiérrez
Propuestas del consejo de administración a los distintos puntos del orden del día de la junta general ordinaria de Sniace S. A. convocada para los días 29, 30 de junio, en primera y segunda convocatoria
This document provides an overview of Java input/output (I/O) concepts including reading from and writing to the console, files, and streams. It discusses different I/O stream classes like PrintStream, InputStream, FileReader, FileWriter, BufferedReader, and how to read/write characters, bytes and objects in Java. The document also introduces new I/O features in Java 7 like try-with-resources for automatic resource management.
The document discusses techniques, challenges, and best practices for handling input/output (I/O) operations in Java. It covers the different types of I/O, how Java supports I/O through streams and readers/writers, issues with streams, alternatives like NIO that support non-blocking I/O using buffers and channels, and "Hiranya's Laws" with guidelines for proper I/O handling.
The document discusses various Java I/O streams including input streams, output streams, byte streams, character streams, buffered streams, properties class, print stream, file locking, serialization and print writer class. It provides examples of reading and writing files using FileInputStream, FileOutputStream, FileReader, FileWriter and other stream classes. Methods of different stream classes are also explained along with their usage.
The document discusses input/output files in Java. It covers the key classes used for reading and writing files in Java, including FileInputStream, FileOutputStream, FileReader, and FileWriter. It also discusses byte streams versus character streams, and provides examples of reading and writing to files in Java using these classes. Standard input/output streams like System.in and System.out are also covered.
The document discusses Java streams and I/O. It defines streams as abstract representations of input/output devices that are sources or destinations of data. It describes byte and character streams, the core stream classes in java.io, predefined System streams, common stream subclasses, reading/writing files and binary data with byte streams, and reading/writing characters with character streams. It also covers object serialization/deserialization and compressing files with GZIP.
This document discusses input and output streams in Java. It defines input streams as streams that receive or read data, and output streams as streams that send or write data. It classifies streams as byte streams, which transfer data as individual bytes and can be used for any file type, and text streams, which transfer data as characters and can only be used for text files. Examples of input and output streams are provided. The document also provides an example of using a FileOutputStream to write text to a file from the keyboard, and an example of using a FileInputStream to read text from that file.
The document discusses advanced input/output (I/O) streams in Java, including character and byte streams, input/output streams, node and filter streams, serialization, and common stream classes like File, Reader, Writer, InputStream, and OutputStream. Key methods for reading, writing, serialization, and deserialization are also summarized.
The document discusses input and output streams in Java. It describes the BufferedReader class, which reads text from a character input stream and buffers it for efficient reading. It also discusses the Scanner class in Java's util package for reading user input through the keyboard. An example program is provided that uses Scanner to read integer and float values from the user and calculate their sum.
This document discusses Java I/O and streams. It begins by introducing files and the File class, which provides methods for obtaining file properties and manipulating files. It then discusses reading and writing files using byte streams like FileInputStream and FileOutputStream. Character streams like PrintWriter and BufferedReader are presented for console I/O. Other stream classes covered include buffered streams, object streams for serialization, and data streams for primitive types. The key methods of various stream classes are listed.
The document discusses files and streams in C++. It defines files as sequences of bytes that end with an end-of-file marker. Streams are used to connect programs to files for input and output. There are standard input and output streams (cin and cout) as well as file streams that use classes like ifstream for input and ofstream for output. Files can be accessed sequentially or randomly - sequential files are read from start to finish while random access files allow direct access to any record.
This document provides an overview of Java input-output (I/O) streams and classes. It discusses the core stream classes like InputStream, OutputStream, Reader, Writer and their subclasses like FileInputStream, FileOutputStream, FileReader, FileWriter. It also covers buffered stream classes like BufferedInputStream, BufferedOutputStream, BufferedReader, BufferedWriter which provide better performance. Examples are given to demonstrate reading, writing and file handling using these stream classes.
Java uses streams to handle input/output operations. Streams provide a standardized way to read from and write to various sources and sinks like files, networks, and buffers. There are byte streams that handle input/output of bytes and character streams that handle characters. Common stream classes include FileInputStream, FileOutputStream, BufferedReader, and BufferedWriter which are used to read from and write to files and console. Streams can be chained together for complex I/O processing.
Streams are used to transfer data between a program and source/destination. They transfer data independently of the source/destination. Streams are classified as input or output streams depending on the direction of data transfer, and as byte or character streams depending on how the data is carried. Common stream classes in Java include FileInputStream, FileOutputStream, FileReader, and FileWriter for reading from and writing to files. Exceptions like FileNotFoundException may occur if a file cannot be opened.
This document discusses the differences between C, C++ and Java programming languages. It notes that Java is a purely object-oriented language, unlike C and C++ which also support procedural programming. Java is platform independent unlike C and C++. The document also discusses how Java is strongly associated with the internet and world wide web, enabling the creation of interactive applets and incorporation of animations into web pages. Finally, it provides a brief overview of how web browsers function by requesting and displaying web page content from servers.
The document discusses file input/output (IO) in Java. It covers key concepts like streams, files, the File class, and IO classes. The File class represents file and directory pathnames and is used to get file information. Streams are used for IO and can be byte-based or character-based. The File class has methods for renaming, deleting, and getting attributes of files. Sample programs demonstrate using the File class to rename and delete files. The document also outlines the main abstract stream classes in Java for input, output, readers and writers.
This document discusses Java file input/output and streams. It covers the core stream classes like InputStream, OutputStream, Reader and Writer and their subclasses. File and FileInputStream/FileOutputStream allow working with files and directories on the file system. The key abstraction is streams, which are linked to physical devices and provide a way to send and receive data through classes that perform input or output of bytes or characters.
The document discusses Java I/O and provides an overview of key concepts like streams, readers/writers, files, serialization, and tokenization. It describes the different types of input/output streams, readers, and writers in Java and best practices for working with them. Examples are provided to demonstrate reading from and writing to files, streams, and using serialization and tokenization.
Files are used to store data permanently. C++ provides the fstream, ifstream, and ofstream classes to handle file input/output. These classes allow you to open, read, write, and close files. The key file operations in C++ are open() to create or open a file, read() and write() to input and output data, and close() to finalize changes and release resources. A program example is given that takes user input, stores it in a text file, then reads and displays the data.
Propuestas del consejo de administración de SniaceDiego Gutiérrez
Propuestas del consejo de administración a los distintos puntos del orden del día de la junta general ordinaria de Sniace S. A. convocada para los días 29, 30 de junio, en primera y segunda convocatoria
Presentataion Oil&Gas Telecommunications Conference - Radio LInk Project Andrea Vallavanti
The document describes the Floating Storage Regasification Unit (FSRU) Toscana offshore LNG terminal located 12 miles off the coast of Livorno, Italy. It discusses the technical details of converting an LNG carrier into an FSRU with a regasification capacity of 3.75 bcm/a. It outlines the challenges of establishing a reliable radio link between the moving FSRU and the onshore base in Livorno to address the FSRU's communication needs. A two-hop radio link solution using Aviat and 4RF equipment was implemented to overcome issues like multipath fading and limited antenna heights. Significant infrastructure upgrades were required on both the FSRU and onshore sites.
HGFD is a mobile game where the objective is to gain points through tasks and mini-games. Players can spend points on bonuses to help earn more points, but once points are depleted the game is over. The game includes different mini-games testing skills like reaction time and problem-solving abilities alongside an element of luck.
Lady Gaga, whose real name is Stefani Joanne Angelina Germanotta, is an American singer, songwriter, and actress. The website provides links to Lady Gaga's social media accounts and online stores to purchase merchandise. It also has a gallery of Lady Gaga's album artwork and photos.
EMD Serono Analysis - MBA Organizational Behavior ClassSam Bishop
This document provides an outline for a paper analyzing organizational behavior related to worker effectiveness at EMD Serono, a mid-size biopharmaceutical company. It will focus on performance management, decision making, and work design. The outline includes an overview of EMD Serono, a literature review on the organizational behavior topics, an analysis of EMD Serono's current practices, recommendations for improvements, and an implementation plan. Performance management will aim to better define roles and link rewards to performance. Decision making processes will provide clear objectives and iterative feedback. Work design recommendations are to enhance skills utilization and autonomy. The analysis seeks to boost worker effectiveness through upgraded organizational behavior practices.
This document summarizes a book review of the book "Unlearning Liberty: Campus Censorship and the End of American Debate" by Greg Lukianoff. The review discusses how censorship has increased on college campuses and students are increasingly accepting of it. It outlines several cases where students were censored or punished for speech, including a student expelled for a Facebook post and a student punished for reading a book. The review argues this type of censorship teaches students to not be free-thinking citizens and is "unlearning liberty" in society as these students become adults.
Enersys Case Study - MBA Strategic Mgmt ClassSam Bishop
This document provides a strategic analysis of Enersys, Inc., a major industrial battery manufacturer. It discusses the company's internal strengths such as its strong financial position and global production capacity, as well as weaknesses like overreliance on lead-acid batteries. External opportunities include new technologies and partnerships, while threats include new entrants and rising material costs. The document analyzes the industry, Enersys' products and markets, and provides recommendations to transform and incrementally improve the company's strategy.
The document discusses cheats for the game Bad Eggs 2 that allow players to unlock elite weapons from premium weapon packs without purchasing points. Activating the weapon cheats will randomly assign premium weapons from packs 1-10 to the player's loadout at the start of each game, including legendary weapons like Falling Elephants and Turrets as well as high-level weapons normally unavailable to low-level players. The cheats also unlock elite weapons that correspond to premium shells purchasable for points in the game.
Lean Manufacturing Overview - MBA Consulting ClassSam Bishop
The document discusses Lean Thinking and process improvements using Lean principles in light manufacturing. It defines Lean as minimizing waste through continual process improvements while respecting workers. The seven types of waste are described as overproduction, inventory, waiting, unnecessary transport, unnecessary processing, defects, and overprocessing. Methods to reduce waste include just-in-time production, Kanban systems, continuous flow, reducing batch sizes, standardizing work, and improving layouts. Lean tools like process flow diagrams, spaghetti diagrams, swimlane diagrams and value stream maps are used to analyze current and ideal future states. The key to Lean is continuous improvement through incremental changes to further eliminate waste and pursue perfection.
This document presents a seminar report on generating power through speed breakers. It discusses using the kinetic energy of vehicles passing over speed breakers to power generators through various mechanisms like rack-pinion systems or piezoelectric materials. The report acknowledges faculty guidance and provides an abstract on addressing India's electricity crisis by utilizing wasted energy from speed breakers. It then details the operating principles, results and advantages of different power generation designs, such as producing 0.98 kW from 100 vehicles passing per minute. The conclusion is that speed breaker power generation will be a more efficient and economical alternative energy source in the future.
Infiniti Poker Marketing Plan - MBA Marketing ClassSam Bishop
The document outlines Infiniti Poker's goals, strategies, and implementation plans for becoming a leading online poker site for US players. Its key goals are to position itself as THE site for US players through convenient deposit/withdrawal options like Bitcoin that provide a live poker experience. Its initial strategic focus will be niche marketing to experienced US players abandoned after the UIGEA by providing superior features. Challenges include gaining critical mass of players and market share before larger sites copy its model.
Streams are used for reading and writing data in Java. The Scanner class is used for reading text files by constructing a Scanner from a File object. The PrintStream class is used for writing to text files by specifying the file name and encoding. Exceptions may occur during I/O operations and should be handled using try-catch blocks to prevent program errors.
File input and output operations in Java are performed using streams. There are two types of streams - byte streams and character streams. Byte streams handle input/output at the byte level while character streams handle input/output at the character level using Unicode encoding. The File class in Java represents files and directories on the filesystem and provides methods to perform operations like creating, reading, updating and deleting files.
This document discusses file handling in Java. It begins by explaining that a file stores related information together and describes standard input, output, and error streams in Java which represent System.in, System.out, and System.err. It then discusses input and output streams in Java, describing how to create them and common methods. It also covers the Java File class and common file operations like creating, reading from, writing to, and deleting files.
The document discusses file input and output in Java. It covers the File class, opening files for reading using a Scanner, handling exceptions, reading data line-by-line and tokenizing the lines. It also discusses opening files for writing using a PrintWriter and outputting data to files. The key topics are file I/O, exception handling, and using Scanners and PrintWriters to read from and write to files in Java.
C++ - UNIT_-_V.pptx which contains details about File ConceptsANUSUYA S
The document discusses file handling in C++. It explains that files are used to store data permanently on a storage device. There are three main classes used for file handling - ifstream for input, ofstream for output, and fstream for both input and output. The key file handling operations include opening a file using open(), reading from a file using read(), writing to a file using write(), and closing a file using close(). It also discusses opening files in different modes, reading and writing binary data to files, and handling exceptions that may occur during file operations.
In this chapter we will review how to work with text files in C#. We will explain what a stream is, what its purpose is, and how to use it. We will explain what a text file is and how can you read and write data to a text file and how to deal with different character encodings. We will demonstrate and explain the good practices for exception handling when working with files. All of this will be demonstrated with many examples in this chapter
1. C++ provides classes like ofstream, ifstream, and fstream to perform input and output of characters to and from files.
2. To read or write data to a file, you must open the file, perform the read or write operation, then close the file.
3. The ifstream class is used to read from files, ofstream is used to write to files, and fstream can be used for both reading and writing.
the slide about Exception handling in java and the file and io handling in java .inbuilt java packages in for java exception.for beginner in programming
The document discusses input and output streams in Java. It provides an overview of character streams, byte streams, and connected streams. It explains how to read from and write to files using FileInputStream, FileOutputStream, FileReader, and FileWriter. It emphasizes the importance of specifying the correct character encoding when working with text files. An example demonstrates reading an image file as bytes, modifying some bytes, and writing the image to a new file.
The document provides examples of code snippets in C# to demonstrate various OOP concepts like inheritance, polymorphism, delegates, constructors, exception handling, file I/O, and adding a flash item to a website. It also explains XML and DTDs. The code snippets show how to implement inheritance by defining a base Shape class and derived Rectangle class, implement polymorphism by overloading a print method, use delegates to call methods, define default and parameterized constructors, handle exceptions, perform file read/write operations, and add a flash file to an HTML document. The explanation of XML covers internal and external DTD declarations to define document structure.
Packages allow organization of classes and import statements. Package statements declare the package a class belongs to and import statements allow referring to classes in other packages. The compiler uses package and import statements to find classes.
Reader and writer classes provide character-based input/output and are built upon stream classes. FileReader and FileWriter allow reading and writing of character files but performance can be improved by wrapping them in buffered classes like BufferedReader and BufferedWriter. PrintWriter is also commonly used for writing and provides additional functionality.
Packages allow organization of classes and import statements. Package statements declare the package a file belongs to while import statements allow referring to classes from other packages without their fully qualified names. The compiler searches jar files and the classpath to locate classes.
Multithreading allows concurrent execution through threads which are lightweight subtasks that run within a process. Creating a thread can be done by extending Thread class and overriding run() or implementing Runnable interface. Threads make programs scalable and allow asynchronous event-driven programming.
Java I/O uses streams for sequential input/output. Reader/Writer classes provide character-based I/O. File and filter streams provide access to files. Buffered streams improve performance of unbuffered streams
Core Java Programming Language (JSE) : Chapter XI - Console I/O and File I/OWebStackAcademy
This document discusses console and file input/output in Java. It describes how to read from standard input using System.in, write to standard output using System.out, and read/write files using File and FileReader/FileWriter classes. Methods for formatted output/input are also covered. The document provides examples for reading keyboard input, writing to console, and reading/writing files line-by-line.
This document discusses files and exception handling in Python. It begins by defining files and describing different types of files like data, text, and program files. It then covers topics like sequential and random file access, opening and closing files, reading and writing to files, and using file dialogs. The document also discusses retrieving data from the web using functions like urlopen. Finally, it defines exceptions and different types of errors like syntax, runtime, and logical errors. It explains how to handle exceptions in Python using try/except blocks and predefined or user-defined exceptions.
This document discusses Java input/output (IO) streams and serialization. It covers reading and writing text and binary files using classes like FileReader, FileWriter, ObjectInputStream and ObjectOutputStream. It also discusses reading from the keyboard, reading file attributes, serialization which converts an object to bytes, deserialization which converts bytes to an object, and using the Externalizable interface to customize serialization. The goal is to provide an overview of performing IO operations and serialization in Java.
This document provides an overview of file handling in C# using StreamReader and StreamWriter. It includes examples of writing text to a file and reading from a file line by line. It also lists some homework tasks for students, such as printing the first 5 characters from each line of a file in a single line, numbering each line, and splitting the lines of a file between two output files.
This document provides an introduction to file handling in Java. It discusses how file handling allows programs to permanently store output data by writing it to files on secondary storage devices like hard disks. It covers key concepts like input and output streams that represent the flow of data into and out of a program. It also discusses how to create, write to, read from, and delete files in Java using classes like File, FileWriter, FileReader and Scanner. Common file methods like getName(), getAbsolutePath(), exists() are also outlined.
The document provides an overview of file handling in C++. It discusses key concepts such as streams, file types (text and binary), opening and closing files, file modes, input/output operations, and file pointers. Functions for reading and writing to text files include put(), get(), and getline(). Binary files use write() and read() functions. File pointers can be manipulated using seekg(), seekp(), tellg(), and tellp() to move through files.
MISS TEEN LUCKNOW 2024 - WINNER ASIYA 2024DK PAGEANT
In the dynamic city of Lucknow, known for its wealthy social legacy and authentic importance, a youthful star has developed, capturing the hearts of numerous with her elegance, insights, and eagerness. Asiya, as of late delegated as the champ from Lucknow for Miss Youngster India 2024 by the DK Pageant, stands as a confirmation of the monstrous ability and potential dwelling inside the youth of India. This exceptional young lady is a signal of excellence and a paragon of devotion and aspiration.
Insanony: Watch Instagram Stories Secretly - A Complete GuideTrending Blogers
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Biography and career history of Bruno AmezcuaBruno Amezcua
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The Fascinating World of Bats: Unveiling the Secrets of the Nightthomasard1122
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Bats, the mysterious creatures of the night, have long been a source of fascination and fear for humans. With their eerie squeaks and fluttering wings, they have captured our imagination and sparked our curiosity. Yet, beyond the myths and legends, bats are fascinating creatures that play a vital role in our ecosystem.
There are over 1,300 species of bats, ranging from the tiny Kitti's hog-nosed bat to the majestic flying foxes. These winged mammals are found in almost every corner of the globe, from the scorching deserts to the lush rainforests. Their diversity is a testament to their adaptability and resilience.
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In conclusion, bats are more than just creatures of the night; they are a vital part of our ecosystem, playing a crucial role in maintaining the balance of nature. By learning more about these fascinating animals, we can appreciate their importance and work to protect them for generations to come. So, let us embrace the beauty and mystery of bats, and celebrate their unique place in our world.
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Amid the constant barrage of distractions and dwindling motivation, self-discipline emerges as the unwavering beacon that guides individuals toward triumph. This vital quality serves as the key to unlocking one’s true potential, whether the aspiration is to attain personal goals, ascend the career ladder, or refine everyday habits.
Understanding Self-Discipline
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2. Table of Contents
1. What is Stream?
Stream Basics
2. ReadingText Files
The StreamReader Class
3. WritingText Files
The StreamWriter Class
4. Handling I/O Exceptions
4. What is Stream?
Stream is the natural way to transfer data in
the computer world
To read or write a file, we open a stream
connected to the file and access the data
through the stream
Input stream
Output stream
5. Streams Basics
Streams are used for reading and writing data
into and from devices
Streams are ordered sequences of bytes
Provide consecutive access to its elements
Different types of streams are available to
access different data sources:
File access, network access, memory streams
and others
Streams are open before using them and
closed after that
7. The StreamReader Class
System.IO.StreamReader
The easiest way to read a text file
Implements methods for reading text lines and
sequences of characters
Constructed by file name or other stream
Can specify the text encoding (for Cyrillic use
windows-1251)
Works like Console.Read() / ReadLine() but
over text files
8. StreamReader Methods
new StreamReader(fileName)
Constructor for creating reader from given file
ReadLine()
Reads a single text line from the stream
Returns null when end-of-file is reached
ReadToEnd()
Reads all the text until the end of the stream
Close()
Closes the stream reader
9. Reading a text file and printing its content to
the console:
Specifying the text encoding:
Reading aText File
StreamReader reader = new StreamReader("test.txt");
string fileContents = streamReader.ReadToEnd();
Console.WriteLine(fileContents);
streamReader.Close();
StreamReader reader = new StreamReader(
"cyr.txt", Encoding.GetEncoding("windows-1251"));
// Read the file contents here ...
reader.Close();
10. Using StreamReader – Practices
The StreamReader instances should always
be closed by calling the Close() method
Otherwise system resources can be lost
In C# the preferable way to close streams and
readers is by the "using" construction
It automatically calls the Close()after
the using construction is completed
using (<stream object>)
{
// Use the stream here. It will be closed at the end
}
11. Reading aText File – Example
Read and display a text file line by line:
StreamReader reader =
new StreamReader("somefile.txt");
using (reader)
{
int lineNumber = 0;
string line = reader.ReadLine();
while (line != null)
{
lineNumber++;
Console.WriteLine("Line {0}: {1}",
lineNumber, line);
line = reader.ReadLine();
}
}
14. The StreamWriter Class
System.IO.StreamWriter
Similar to StringReader, but instead of
reading, it provides writing functionality
Constructed by file name or other stream
Can define encoding
For Cyrillic use "windows-1251"
StreamWriter streamWriter = new StreamWriter("test.txt",
false, Encoding.GetEncoding("windows-1251"));
StreamWriter streamWriter = new StreamWriter("test.txt");
15. StreamWriter Methods
Write()
Writes string or other object to the stream
Like Console.Write()
WriteLine()
Like Console.WriteLine()
AutoFlush
Indicates whether to flush the internal buffer
after each writing
16. Writing to aText File – Example
Create text file named "numbers.txt" and print
in it the numbers from 1 to 20 (one per line):
StreamWriter streamWriter =
new StreamWriter("numbers.txt");
using (streamWriter)
{
for (int number = 1; number <= 20; number++)
{
streamWriter.WriteLine(number);
}
}
19. What is Exception?
"An event that occurs during the execution of the
program that disrupts the normal flow of
instructions“ – definition by Google
Occurs when an operation can not be completed
Exceptions tell that something unusual was
happened, e. g. error or unexpected event
I/O operations throw exceptions when operation
cannot be performed (e.g. missing file)
When an exception is thrown, all operations after it
are not processed
20. How to Handle Exceptions?
Using try{}, catch{} and finally{} blocks:
try
{
// Some exception is thrown here
}
catch (<exception type>)
{
// Exception is handled here
}
finally
{
// The code here is always executed, no
// matter if an exception has occurred or not
}
21. Catching Exceptions
Catch block specifies the type of exceptions
that is caught
If catch doesn’t specify its type, it catches all
types of exceptions
try
{
StreamReader reader = new StreamReader("somefile.txt");
Console.WriteLine("File successfully open.");
}
catch (FileNotFoundException)
{
Console.Error.WriteLine("Can not find 'somefile.txt'.");
}
22. Handling Exceptions
When Opening a File
try
{
StreamReader streamReader = new StreamReader(
"c:NotExistingFileName.txt");
}
catch (System.NullReferenceException exc)
{
Console.WriteLine(exc.Message);
}
catch (System.IO.FileNotFoundException exc)
{
Console.WriteLine(
"File {0} is not found!", exc.FileName);
}
catch
{
Console.WriteLine("Fatal error occurred.");
}
25. Counting Word
Occurrences – Example
Counting the number of occurrences of the
word "foundme" in a text file:
StreamReader streamReader =
new StreamReader(@"....somefile.txt");
int count = 0;
string text = streamReader.ReadToEnd();
int index = text.IndexOf("foundme", 0);
while (index != -1)
{
count++;
index = text.IndexOf("foundme", index + 1);
}
Console.WriteLine(count);
What is missing
in this code?
27. Reading Subtitles – Example
.....
{2757}{2803} Allen, Bomb Squad, Special Services...
{2804}{2874} State Police and the FBI!
{2875}{2963} Lieutenant! I want you to go to St. John's
Emergency...
{2964}{3037} in case we got any walk-ins from the street.
{3038}{3094} Kramer, get the city engineer!
{3095}{3142} I gotta find out a damage report. It's very
important.
{3171}{3219} Who the hell would want to blow up a department
store?
.....
We are given a standard movie subtitles file:
28. Fixing Subtitles – Example
Read subtitles file and fix it’s timing:
static void Main()
{
try
{
// Obtaining the Cyrillic encoding
System.Text.Encoding encodingCyr =
System.Text.Encoding.GetEncoding(1251);
// Create reader with the Cyrillic encoding
StreamReader streamReader =
new StreamReader("source.sub", encodingCyr);
// Create writer with the Cyrillic encoding
StreamWriter streamWriter =
new StreamWriter("fixed.sub",
false, encodingCyr);
(example continues)
29. Fixing Subtitles – Example
try
{
string line;
while (
(line = streamReader.ReadLine()) != null)
{
streamWriter.WriteLine(FixLine(line));
}
}
finally
{
streamReader.Close();
streamWriter.Close();
}
}
catch (System.Exception exc)
{
Console.WriteLine(exc.Message);
}
}
FixLine(line) perform
fixes on the time offsets:
multiplication or/and
addition with constant
31. Summary
Streams are the main I/O mechanisms
in .NET
The StreamReader class and ReadLine()
method are used to read text files
The StreamWriter class and WriteLine()
method are used to write text files
Exceptions are unusual events or error
conditions
Can be handled by try-catch-finally blocks
33. Exercises
1. Write a program that reads a text file and prints on
the console its odd lines.
2. Write a program that concatenates two text files
into another text file.
3. Write a program that reads a text file and inserts line
numbers in front of each of its lines.The result
should be written to another text file.
4. Write a program that compares two text files line by
line and prints the number of lines that are the same
and the number of lines that are different. Assume
the files have equal number of lines.
34. Exercises (2)
5. Write a program that reads a text file containing a
square matrix of numbers and finds in the matrix an
area of size 2 x 2 with a maximal sum of its
elements. The first line in the input file contains the
size of matrix N. Each of the next N lines contain N
numbers separated by space.The output should be a
single number in a separate text file. Example:
4
2 3 3 4
0 2 3 4 17
3 7 1 2
4 3 3 2
35. Exercises (3)
6. Write a program that reads a text file containing a
list of strings, sorts them and saves them to another
text file. Example:
Ivan George
Peter Ivan
Maria Maria
George Peter
7. Write a program that replaces all occurrences of the
substring "start" with the substring "finish" in a text
file. Ensure it will work with large files (e.g. 100 MB).
8. Modify the solution of the previous problem to
replace only whole words (not substrings).
36. Exercises (4)
9. Write a program that deletes from given text file all
odd lines.The result should be in the same file.
10. Write a program that extracts from given XML file
all the text without the tags. Example:
11. Write a program that deletes from a text file all
words that start with the prefix "test". Words
contain only the symbols 0...9, a...z, A…Z, _.
<?xml version="1.0"><student><name>Pesho</name>
<age>21</age><interests count="3"><interest>
Games</instrest><interest>C#</instrest><interest>
Java</instrest></interests></student>
37. Exercises (5)
12. Write a program that removes from a text file all
words listed in given another text file. Handle all
possible exceptions in your methods.
13. Write a program that reads a list of words from a file
words.txt and finds how many times each of the
words is contained in another file test.txt.The
result should be written in the file result.txt and
the words should be sorted by the number of their
occurrences in descending order. Handle all possible
exceptions in your methods.
Editor's Notes
(c) 2007 National Academy for Software Development - http://academy.devbg.org. All rights reserved. Unauthorized copying or re-distribution is strictly prohibited.*
(c) 2007 National Academy for Software Development - http://academy.devbg.org. All rights reserved. Unauthorized copying or re-distribution is strictly prohibited.*
(c) 2007 National Academy for Software Development - http://academy.devbg.org. All rights reserved. Unauthorized copying or re-distribution is strictly prohibited.*
(c) 2007 National Academy for Software Development - http://academy.devbg.org. All rights reserved. Unauthorized copying or re-distribution is strictly prohibited.*
(c) 2007 National Academy for Software Development - http://academy.devbg.org. All rights reserved. Unauthorized copying or re-distribution is strictly prohibited.*
(c) 2007 National Academy for Software Development - http://academy.devbg.org. All rights reserved. Unauthorized copying or re-distribution is strictly prohibited.*
(c) 2007 National Academy for Software Development - http://academy.devbg.org. All rights reserved. Unauthorized copying or re-distribution is strictly prohibited.*
(c) 2007 National Academy for Software Development - http://academy.devbg.org. All rights reserved. Unauthorized copying or re-distribution is strictly prohibited.*
(c) 2007 National Academy for Software Development - http://academy.devbg.org. All rights reserved. Unauthorized copying or re-distribution is strictly prohibited.*
(c) 2007 National Academy for Software Development - http://academy.devbg.org. All rights reserved. Unauthorized copying or re-distribution is strictly prohibited.*
(c) 2007 National Academy for Software Development - http://academy.devbg.org. All rights reserved. Unauthorized copying or re-distribution is strictly prohibited.*
(c) 2007 National Academy for Software Development - http://academy.devbg.org. All rights reserved. Unauthorized copying or re-distribution is strictly prohibited.*
(c) 2007 National Academy for Software Development - http://academy.devbg.org. All rights reserved. Unauthorized copying or re-distribution is strictly prohibited.*
(c) 2007 National Academy for Software Development - http://academy.devbg.org. All rights reserved. Unauthorized copying or re-distribution is strictly prohibited.*
(c) 2007 National Academy for Software Development - http://academy.devbg.org. All rights reserved. Unauthorized copying or re-distribution is strictly prohibited.*
(c) 2007 National Academy for Software Development - http://academy.devbg.org. All rights reserved. Unauthorized copying or re-distribution is strictly prohibited.*
(c) 2007 National Academy for Software Development - http://academy.devbg.org. All rights reserved. Unauthorized copying or re-distribution is strictly prohibited.*
(c) 2007 National Academy for Software Development - http://academy.devbg.org. All rights reserved. Unauthorized copying or re-distribution is strictly prohibited.*