Table of Contents
What is a PushbackReader?
PushbackReader , is intended to be used when you parse data from a Reader. Sometimes you need to read ahead a few characters to see what is coming, before you can determine how to interpret the current character. The Java PushbackReader allows you to do that.
What is PushbackInputStream in Java?
Pushback is used on an input stream to allow a byte to be read and then returned (i.e, “pushed back”) to the stream. The PushbackInputStream class implements this idea. It provides a mechanism “peek” at what is coming from an input stream without disrupting it.
What is FilterReader Java?
Java FilterReader is used to perform filtering operation on reader stream. It is an abstract class for reading filtered character streams. The FilterReader provides default methods that passes all requests to the contained stream.
What is filter input stream?
A FilterInputStream contains some other input stream, which it uses as its basic source of data, possibly transforming the data along the way or providing additional functionality.
How do you use SequenceInputStream?
SequenceInputStream example that reads data using enumeration
- package com.javatpoint;
- import java.io.*;
- import java.util.*;
- class Input2{
- public static void main(String args[])throws IOException{
- //creating the FileInputStream objects for all the files.
- FileInputStream fin=new FileInputStream(“D:\\a.txt”);
What is file output stream?
FileOutputStream is an outputstream for writing data/streams of raw bytes to file or storing data to file. FileOutputStream is a subclass of OutputStream. To write primitive values into a file, we use FileOutputStream class.
What is FileInputStream in Java?
A FileInputStream obtains input bytes from a file in a file system. What files are available depends on the host environment. FileInputStream is meant for reading streams of raw bytes such as image data. For reading streams of characters, consider using FileReader .
What is PrintStream and PrintWriter?
The primary difference is that PrintStream writes raw bytes in the machine’s native character format, and PrintWriter converts bytes to recognized encoding schemes. Thus, files created with PrintWriter are more compatible across different platforms than files created with PrintStream .
Why do we use PrintWriter?
PrintWriter ) enables you to write formatted data to an underlying Writer . For instance, writing int , long and other primitive data formatted as text, rather than as their byte values. The Java PrintWriter is useful if you are generating reports (or similar) where you have to mix text and numbers.
What does FilterOutputStream write do?
write. Writes len bytes from the specified byte array starting at offset off to this output stream. The write method of FilterOutputStream calls the write method of one argument on each byte to output. Note that this method does not call the write method of its underlying input stream with the same arguments.
What is InputStream class in Java?
InputStream class is the superclass of all classes representing an input stream of bytes. Applications that need to define a subclass of InputStream must always provide a method that returns the next byte of input.