算法训练 最长字符串

求出5个字符串中最长的字符串。每个字符串长度在100以内，且全为小写字母。样例输入one two threefour five样例输出three题目注意事项
利用循环标记处较大的字符串，然后输出
题目源代码import java.util.*;
import java.math.*;

public class Main {

public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner cin = new Scanner(System.in);
String[] S = new String[5];
int max = 0;
int flag = 0;
for(int i = 0; i < 5; i++) {
S[i] = cin.next();
if(S[i].length() > max) {
max = S[i].length();
flag = i;
}
}
System.out.println(S[flag]);
}

}