java collection.sort()根据时间排序list
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