1.3---字符串重新排列后是否能够变成另一个字符串（CC150）

import java.util.*;
 
public class Same {
    public boolean checkSam(String str1, String str2) {
        // write code here
            if(str1.length() != str2.length()) return false;
        StringBuffer sb1 = new StringBuffer(str1);
        StringBuffer sb2 = new StringBuffer(str2);
         
        for(int i = 0; i < str1.length(); i++){
            int tmp = sb2.indexOf(sb1.substring(i, i+1));
            if(tmp == -1) return false;
            sb2.deleteCharAt(tmp);
        }
        if(sb2.length() == 0) return true;
        return false;
    }
}