Java String convert from ByteBuffer by Charset

import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.charset.Charset;

public class Main {
  public static void main(String[] argv) {
    ByteBuffer b = ByteBuffer.wrap("demo2s.com".getBytes());
    //  w w  w .  j a  v  a2s  . c  om
    String s = stringFromBuffer(b , Charset.defaultCharset());
    System.out.println(s);
  }

  /**
   * Convert the content of a byte buffer to a string
   * 
   * @param buf
   *          is the byte buffer
   * @param charset
   *          indicates the character set encoding
   * @return a string
   */
  public static String stringFromBuffer(ByteBuffer buf, Charset charset) {
    CharBuffer cb = charset.decode(buf.duplicate());
    return (cb.toString());
  }

}