java List ÅÅÐò Collections.sort() ¶Ô List ÅÅÐò

class User {
String name;
String age;

public User(String name,String age){
this.name=name;
this.age=age;
}
public String getAge() {
return age;
}
public void setAge(String age) {
this.age = age;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}

//¾ßÌåµÄ±È½ÏÀ࣬ʵÏÖComparator½Ó¿Ú
import java.util.Comparator;
import java.util.List;
import java.util.ArrayList;
import java.util.Collections;
public class ComparatorUser implements Comparator{
public int compare(Object arg0, Object arg1) {
User user0=(User)arg0;
User user1=(User)arg1;
//Ê×ÏȱȽÏÄêÁ䣬Èç¹ûÄêÁäÏàͬ£¬Ôò±È½ÏÃû×Ö
int flag=user0.getAge().compareTo(user1.getAge());
if(flag==0){
return user0.getName().compareTo(user1.getName());
}else{
return flag;
}
}

}

//²âÊÔÀà
public class SortTest {

public static void main(String[] args){
List userlist=new ArrayList();
userlist.add(new User("dd","4"));
userlist.add(new User("aa","1"));
userlist.add(new User("ee","5"));
userlist.add(new User("bb","2"));
userlist.add(new User("ff","5"));
userlist.add(new User("cc","3"));
userlist.add(new User("gg","6"));

ComparatorUser comparator=new ComparatorUser();
Collections.sort(userlist, comparator);

for (int i=0;i<userlist.size();i++){
User user_temp=(User)userlist.get(i);
System.out.println(user_temp.getAge()+","+user_temp.getName());
}

}
}
 
 //Ê×ÏÈÄêÁäÅÅÐò£¬Èç¹ûÄêÁäÏàͬ£¬Ôò°´Ãû×ÖÅÅÐò
½á¹û:
   1, aa
   2, bb
   3, cc
   4, dd
   5, ee                    //×¢Òâ:ͬÑùÊÇ5ËêµÄÈË£¬Ôò±È½ÏÃû×Ö(ee,ff)£¬È»ºóÅÅÐò
   5, ff
   6, gg
ת×Ô£ºhttp://www.blogjava.net/zygcs/archive/2008/01/17/176032.html