Java CharArrayReader read from char array

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

public class Main {
  public static void main(String args[]) throws IOException {
    CharArrayWriter outStream = new CharArrayWriter();
    String s = "This is a test from demo2s.com.";
    for (int i = 0; i < s.length(); ++i)
      outStream.write(s.charAt(i));/* w  w w .  j a  v a2s .c  o m*/


    CharArrayReader inStream;
    inStream = new CharArrayReader(outStream.toCharArray());
    int ch = 0;
    StringBuffer sb = new StringBuffer("");
    while ((ch = inStream.read()) != -1)
      sb.append((char) ch);
    s = sb.toString();
    System.out.println(s.length() + " characters were read");
    System.out.println("They are: " + s);

    
  }
}