Java字符串排序

import java.util.*;
 
public class test {
 public static void main(String[] args) {
  ArrayList list = new ArrayList();
  list.add("A010101 ".toUpperCase());
  list.add("a010003 ".toUpperCase());
  list.add("B010201 ".toUpperCase());
  Collections.sort(list);
 
  for (int i = 0; i < list.size(); i++) {
   System.out.println((String) list.get(i));
 
  System.out.println("test:" + ((String)list.get(i)).substring(3));
  }
 }
}