import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;

public class ListSort {
     public static void main(String[] args){
         ArrayList list = new ArrayList();
         list.add(new Person("lcl",28));
         list.add(new Person("fx",23));
         list.add(new Person("wqx",29));
         Comparator comp = new Comparator(){
          public int compare(Object o1,Object o2) {
              Person p1=(Person)o1;
              Person p2=(Person)o2; 
             if(p1.age<p2.age)//或者比较name属性((p1.name.toString()).CompareTo.(p2.name.toString())>0)
                 return 1;
             else
                 return 0;
             }
        };
         Collections.sort(list,comp);
        
      
         for(int i = 0;i<list.size();i++){
             Person p = (Person)list.get(i);
             System.out.println(p.getName());
         } 
     }

     public  static class Person  {
        
         private int age;
         private String name;
        public Person(String name,int age){
         this.age = age;
         this.name = name;
        }
        public int getAge() {
      return age;
     }
     public void setAge(int age) {
      this.age = age;
     }
     public String getName() {
      return name;
     }
     public void setName(String name) {
      this.name = name;
     }
      
          }
   }