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;
}
}