学步园

首先：定义bean

然后：定义比较器

最后：测试使用

一.userBean

package com.butterfly.Class;

public class user {
	private String name;
	private String sex;
	private int age;
	private String birthday;
	
	public user(String name,String sex,int age,String birthday){
		this.name = name;
		this.sex = sex;
		this.age = age;
		this.birthday = birthday;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public String getSex() {
		return sex;
	}
	public void setSex(String sex) {
		this.sex = sex;
	}
	public int getAge() {
		return age;
	}
	public void setAge(int age) {
		this.age = age;
	}
	public String getBirthday() {
		return birthday;
	}
	public void setBirthday(String birthday) {
		this.birthday = birthday;
	}
	
	
}

二.定义比较器

package com.butterfly.Class;

import java.util.Comparator;

public class sortClass implements Comparator{
	public int compare(Object arg0,Object arg1){
		user user0 = (user)arg0;
		user user1 = (user)arg1;
		int flag = user0.getBirthday().compareTo(user1.getBirthday());
		return flag;
	}
}

三.测试使用

package com.butterfly.Class;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

public class testClass {
	public static void main(String[] args){
		List userList = new ArrayList();
		userList.add(new user("吴光雷","男",25,"19871028"));
		userList.add(new user("吴桥","男",22,"19900923"));
		userList.add(new user("陆晓敏","男",25,"19870728"));
		userList.add(new user("王佳俊","男",23,"19890728"));
		userList.add(new user("秦菁","女",23,"19891212"));
		
		sortClass sort = new sortClass();
		Collections.sort(userList,sort);
		for(int i=0;i<userList.size();i++){
			user temp = (user)userList.get(i);
			System.out.println("姓名:"+temp.getName()+",生日:"+temp.getBirthday());
		}
	}
}

 输出结果：

姓名:陆晓敏,生日:19870728
姓名:吴光雷,生日:19871028
姓名:王佳俊,生日:19890728
姓名:秦菁,生日:19891212
姓名:吴桥,生日:19900923