CharArrayWriter 

Introduction

The Java.io.CharArrayWriter class implements a character buffer that can be used as an Writer. The buffer automatically grows when data is written to the stream.

Class declaration

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

public class CharArrayWriter
   extends Writer

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Field

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

• protected char[] buf − This is the buffer where data is stored.
• protected int count − This is the number of chars in the buffer.
• protected Object lock − This is the object used to synchronize operations on this stream.

Class constructors

Sr.No.	Constructor & Description
1	CharArrayWriter()This creates a CharArrayReader from the specified array of chars.
2	CharArrayWriter(int initialSize)This creates a new CharArrayWriter with the specified initial size.

Class methods

Sr.No.	Method & Description
1	CharArrayWriter append(char c)This method appends the specified character to this writer.
2	CharArrayWriter append(CharSequence csq)This method appends the specified character sequence to this writer.
3	CharArrayWriter append(CharSequence csq, int start, int end)This method appends a subsequence of the specified character sequence to this writer.
4	void close()This method close the stream.
5	void flush()This method flush the stream.
6	void reset()This method resets the buffer so that you can use it again without throwing away the already allocated buffer.
7	int size()This method returns the current size of the buffer.
8	char[] toCharArray()This method returns a copy of the input data.
9	String toString()This method converts input data to a string.
10	void write(char[] c, int off, int len)This method writes characters to the buffer.
11	void write(int c)This method writes a character to the buffer.
12	void write(String str, int off, int len)This method write a portion of a string to the buffer.
13	void writeTo(Writer out)This method writes the contents of the buffer to another character stream.

Methods inherited

This class inherits methods from the following classes −

• Java.io.Writer
• Java.io.Object