class Solution {
public char findTheDifference(String s, String t) {
char[] schar = s.toCharArray();//将字符串转换为字符数组
char[] tchar = t.toCharArray();
Arrays.sort(schar);//对字符数组进行重新排序
Arrays.sort(tchar);
for(int i = 0; i<schar.length; i++){//遍历数组
if(schar[i]!=tchar[i]){ //比较不相同的字符
return tchar[i];
}
}
return tchar[s.length()]; //返回字符串
}
}