编码和解码

import java.nio.ByteBuffer;   
import java.nio.charset.Charset;   
  
public class EncodeDecode {   
  
  public static void print(ByteBuffer bb) {   
    while (bb.hasRemaining())   
      System.out.print(bb.get() + " ");   
    System.out.println();   
    bb.rewind();   
  }   
  
  public static void main(String[] args) {   
    ByteBuffer bb = ByteBuffer.wrap(new byte[] { 0, 0, 0, 0, 0, 0, 0,   
        (byte) 'a' });   
    System.out.println("Initial Byte Buffer");   
    print(bb);   
    Charset[] csets = { Charset.forName("UTF-16LE"),   
        Charset.forName("UTF-16BE"), Charset.forName("UTF-8"),   
        Charset.forName("US-ASCII"), Charset.forName("ISO-8859-1") };   
    for (int i = 0; i < csets.length; i++) {   
      System.out.println(csets[i].name() + ":");   
      print(csets[i].encode(bb.asCharBuffer()));   
      csets[i].decode(bb);   
      bb.rewind();   
    }   
  
  }   
}