CharArrayWriter in Java

CharArrayWriter implements a character buffer that can be used as an Writer. The buffer automatically grows when data is written to the stream. The data can be retrieved using toCharArray() and toString().
Note: Invoking close() on this class has no effect, and methods of this class can be called after the stream has closed without generating an IOException.

Constructors

Methods

package com.java.io;

import java.io.CharArrayWriter;
import java.io.IOException;

public class CharArrayWriterExample {

    public static void main(String[] args) {

        CharArrayWriter charArrayWriter = null;
        try {
            charArrayWriter = new CharArrayWriter();
            charArrayWriter.write(" data1 ");
            charArrayWriter.write(" data2 ");
            charArrayWriter.write(" data3 ");
            char[] chars = charArrayWriter.toCharArray();
            for (int i = 0; i < chars.length; i++) {
                System.out.print(chars[i]);
            }


        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            // Closing the streams
            if (charArrayWriter != null)
                charArrayWriter.close();
        }

    }

}

data1 data2 data3

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Java I/O Basics