排序（对对象进行排序）二

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功能：通过java对对象按生日时间进行升序排序

代码块

User .java

package com.yubai;/** * Created by bayu on 9/13/2017. */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;    }}

SortClass .java

package com.yubai;import java.util.Comparator;/** * Created by bayu on 9/13/2017. */public class SortClass implements Comparator{    @Override    public int compare(Object o1, Object o2) {        User u1 = (User)o1;        User u2 = (User)o2;        return u1.getBirthday().compareTo(u2.getBirthday());    }}

UserTest .java

package com.yubai;import java.util.ArrayList;import java.util.Collection;import java.util.Collections;import java.util.List;/** * Created by bayu on 9/13/2017. */public class UserTest {    public static void main(String[] args) {        List<User> userList = new ArrayList<User>();        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 (User u:userList) {            System.out.println(u.getName()+","+u.getSex()+","+u.getAge()+","+u.getBirthday());        }    }}

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