CharArrayWriter

import java.io.CharArrayWriter;
import java.io.IOException;
//  j  a  v a2s . c  o  m
public class Main {
  public static void main(String args[]) throws IOException {
    CharArrayWriter outStream = new CharArrayWriter();
    outStream.write('a');
    outStream.write('b');
    outStream.write('c');
    outStream.write('d');
    outStream.write('e');
    outStream.write('f');
    outStream.write("java2s.com");
    
    System.out.println("outstream: " + outStream);
    System.out.println("size: " + outStream.size());

  }
}

import java.io.CharArrayWriter;
import java.io.FileWriter;
import java.io.IOException;
//  java2 s. co m
public class Main {
  public static void main(String args[]) throws IOException {
    CharArrayWriter f = new CharArrayWriter();
    String s = "This should end up in the array";
    char buf[] = new char[s.length()];
    s.getChars(0, s.length(), buf, 0);
    f.write(buf);
    System.out.println(f.toString());

    char c[] = f.toCharArray();
    for (int i = 0; i < c.length; i++) {
      System.out.print(c[i]);
    }
  }
}