public?class?Test?{
????public?static?void?main(String[]?args)?{
????????String?s1?=?"aaa";
????????String?s2?=?"cccx";
?????????
????????s1?=?s1?+?s2;
????????s2?=?s1.substring(0,?s1.length()-s2.length());
????????s1?=?s1.substring(s2.length());
?????????
????????System.out.println(s1+"?-?"+s2);
????}
}
