目標：實現對Person 對象的年齡，從小到大排序

1、實現排序

 1 package com.app; 2 3 import java.util.ArrayList; 4 import java.util.Collections; 5 import java.util.Comparator; 6 import java.util.List; 7  8 public class A1 { 9 10     public static void main(String[] args) {11         List<Person> list = getData() ;12         //排序13         Collections.sort( list , comparator );14         15         for (Person person : list) {16             System.out.
2、創建Person類
package com.app;public class Person {    private int age ;    private String 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;    }}
3、運行結果（實現對年齡的排序）
 person p1 10 person p4 15 person p3 20 person p2 30