CharBuffer is part of the java.nio package and is a buffer for handling characters. It is useful for character-based input/output operations, such as text parsing, network communication, or file processing. It works similarly to ByteBuffer but specifically stores 16-bit char values. Commonly Used Methods Simple Program using CharBuffer Writing and Reading Characters Problem Statement: LotusJavaPrince […]
ByteBuffer is a concrete subclass of Buffer (from java.nio) that is used for handling byte data in a fast, efficient, and non-blocking way. It’s part of Java NIO (New I/O) and allows direct or indirect memory management. Commonly Used Methods Simple Program using ByteBuffer Problem Statement: LotusJavaPrince is building a chat application. Mahesh suggests using
Java introduced the New I/O (NIO) package (java.nio) to provide more efficient data handling, especially for large-scale, non-blocking input/output operations. Central to this NIO architecture is the Buffer class and its subclasses, which are used for storing and manipulating data in memory. 1. The Root Class – java.nio.Buffer At the top of the hierarchy is
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The Buffer class is an abstract class in the java.nio package, serving as the foundation for all buffer classes like ByteBuffer, CharBuffer, IntBuffer, etc. A buffer is a container for a fixed amount of data of a specific primitive type. Commonly Used Methods Simple Program using ByteBuffer This program demonstrates basic usage of a buffer
The Console class in Java (available in the java.io package) provides methods to access the character-based console device — typically, the text terminal from which the user runs the program. It’s useful for reading input and writing output in a secure and interactive way, especially for password input where echoing is disabled. The Console class
1. Create a New File This program demonstrates how to create a new file using the File class. If the file already exists, an appropriate message is displayed. 2. Write Data to a File This program writes text into a file using the FileWriter class. If the file does not exist, it is created automatically.
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FileWriter is a character stream class used to write character data (text) to a file. It is part of the java.io package and is used for writing text files. Commonly Used Constructors and Methods Simple Program Mahesh wants to write a greeting message to a file named greeting.txt using FileWriter. Content of greeting.txt after execution:
FileReader is a character-based class in the java.io package used to read data from files as characters (not bytes). It is mainly used for reading text files. Commonly Used Constructors and Methods Simple Program Mahesh has a file data.txt that contains a simple message. He wants to read the contents and display them on the
FileInputStream is a byte stream class used to read raw bytes from a file. It is useful for reading binary files, such as images, audio files, PDFs, etc.It is part of the java.io package and a subclass of InputStream. Commonly Used Constructors and Methods Simple Program Mahesh wants to read the content of a file
The File class in java.io package represents a file or directory path in the file system. It provides methods to create, delete, inspect, and manipulate files and directories but does not provide direct file content reading or writing capabilities. Those operations are done using other stream classes like FileReader, FileWriter, etc. Commonly Used Constructors and
