Writer 

Introduction

The Java.io.Writer class is a abstract class for writing to character streams.

Class declaration

Following is the declaration for Java.io.Writer class −

public abstract class Writer
   extends Object
      implements Appendable, Closeable, Flushable

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Field

Following are the fields for Java.io.Writer class −

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

Class constructors

Sr.No.	Constructor & Description
1	protected Writer()This creates a new character-stream writer whose critical sections will synchronize on the writer itself.
2	protected Writer(Object lock)This creates a new character-stream writer whose critical sections will synchronize on the given object.

Class methods

Sr.No.	Method & Description
1	Writer append(char c)This method appends the specified character to this writer.
2	Writer append(CharSequence csq)This method appends the specified character sequence to this writer.
3	Writer append(CharSequence csq, int start, int end)This method appends a subsequence of the specified character sequence to this writer.
4	abstract void close()This method loses the stream, flushing it first.
5	abstract void flush()This method flushes the stream.
6	void write(char[] cbuf)This method writes an array of characters.
7	abstract void write(char[] cbuf, int off, int len)This method writes a portion of an array of characters.
8	void write(int c)This method writes a single character.
9	void write(String str)This method writes a string.
10	void write(String str, int off, int len)This method writes a portion of a string.

Methods inherited

This class inherits methods from the following classes −

• Java.io.Object