1.   public static void main(String[] args){
   
2.                 String s1 = “abc”;
   
3.                 String s2 = “xyz”;
   
4. show(s1,s2);
   
5. System.out.println(s1+”-----”+s2);
   
6. }
   
7. static void show(String s1,String s2){
   
8.          s1 = s2+s1+”Q”;
   
9.     s2 = “W”+s1;   
   
10. }

复制代码

结果：abc-----xyz