java List 排序

ListSort.java

package test.map;

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

public class ListSort {
@SuppressWarnings("unchecked")
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)
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;
}

}
}

FROM:http://www.zhuoda.org/haohao/82808.html