Java String getBytes方法

import java.io.*;
public class GetBytesExample{
   public static void main(String args[]){
       String str = new String("Hello");
       byte[] array1 = str.getBytes();
       System.out.print("Default Charset encoding:");
       for(byte b: array1){
           System.out.print(b);
       }
       System.out.print("\nUTF-16 Charset encoding:");
       try{
             byte [] array2 = str.getBytes("UTF-16");
             for(byte b1: array2){
                System.out.print(b1);
             }
             byte [] array3 = str.getBytes("UTF-16BE");
             System.out.print("\nUTF-16BE Charset encoding:");
             for(byte b2: array3){
                System.out.print(b2);
             }
        }catch(UnsupportedEncodingException ex){
             System.out.println("Unsupported character set"+ex);
        }
   }    
}

Default Charset encoding:72101108108111
UTF-16 Charset encoding:-2-10720101010801080111
UTF-16BE Charset encoding:0720101010801080111