题目：字符串排序。
package com.qq.weixin;
import java.util.*;
public class test {
public static void main(String[] args) {
ArrayList<String> list = new ArrayList<String>();
list.add("010101");
list.add("010003");
list.add("010201");
Collections.sort(list);
for (int i = 0; i < list.size(); i++) {
System.out.println(list.get(i));
}
}
}
