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

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