Java.io.CharArrayWriter Class

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

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
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