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
参照此文:http://blog.csdn.net/learner9023/article/details/8432508
时间: 2024-10-07 03:42:24