Java.io.Reader Class


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Introduction

The Java.io.Reader class is a abstract class for reading character streams.

Class declaration

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

public class Reader
  extends Object
    implements DataOutput, DataInput, Closeable

Field

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

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

Class constructors

S.N. Constructor & Description
1

protected Reader()

This creates a new character-stream reader whose critical sections will synchronize on the reader itself.

2

protected Reader(Object lock)

This creates a new character-stream reader whose critical sections will synchronize on the given object.

Class methods

S.N. Method & Description
1

abstract 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.

4

int read()

This method reads a single character.

5

int read(char[] cbuf)

This method reads characters into an array.

6

abstract int read(char[] cbuf, int off, int len)

This method reads characters into a portion of an array.

7

int read(CharBuffer target)

This method attempts to read characters into the specified character buffer.

8

boolean ready()

This method tells whether this stream is ready to be read.

9

void reset()

This method resets the stream.

10

long skip(long n)

This method skips characters.

Methods inherited

This class inherits methods from the following classes:

  • Java.io.Object


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