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