Java.io.PushbackReader Class

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Introduction

The Java.io.PushbackReader class is a character-stream reader that allows characters to be pushed back into the stream.

Class declaration

Following is the declaration for Java.io.PushbackReader class:

public class PushbackReader
   extends FilterReader

Field

Following are the fields for Java.io.PushbackReader class:

  • protected Reader in -- This is the character-input stream.

  • protected Object lock -- This is the object used to synchronize operations on this stream.

Class constructors

S.N.Constructor & Description
1PushbackReader(Reader in)
This creates a new pushback reader with a one-character pushback buffer.
2PushbackReader(Reader in, int size)
This creates a new pushback reader with a pushback buffer of the given size.

Class methods

S.N.Method & Description
1 void close()
This method closes the stream and releases any system resources associated with it.
2 void mark(int readAheadLimit)
This method marks the present position in the stream.
3 boolean markSupported()
This method tells whether this stream supports the mark() operation, which it does not.
4 int read()
This method reads a single character.
5 int read(char[] cbuf, int off, int len)
This method reads characters into a portion of an array.
6 boolean ready()
This method tells whether this stream is ready to be read.
7 void reset()
This method resets the stream.
8 long skip(long n)
This method skips characters.
9 void unread(char[] cbuf)
This method pushes back an array of characters by copying it to the front of the pushback buffer.
10 void unread(char[] cbuf, int off, int len)
This method pushes back a portion of an array of characters by copying it to the front of the pushback buffer.
11 void unread(int c)
This method pushes back a single character by copying it to the front of the pushback buffer.

Methods inherited

This class inherits methods from the following classes:

  • Java.io.Reader

  • Java.io.Object




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