比较器排序Coamparator

参数为一个匿名内部类

代码如下：

 

package com.Test01;import java.util.Comparator;import java.util.TreeSet;public class TreeSetDemo {    public static void main(String[] args) {        TreeSet<Student> ts = new TreeSet<Student>(new Comparator<Student>() {            @Override            public int compare(Student s1, Student s2) {                int num = s1.getAge()-s2.getAge();                int num2 = (num == 0 ? s1.getName().compareTo(s2.getName()):num);                return num2;            }        });        Student s1 = new Student("xishi", 29);        Student s2 = new Student("diaochan", 29);        Student s3 = new Student("yangyuhuan", 21);        Student s4 = new Student("wangzhaojun", 26);        ts.add(s1);        ts.add(s2);        ts.add(s3);        ts.add(s4);        for (Student s : ts) {            System.out.println(s.getName() + "," + s.getAge());        }    }}

来源：https://www.cnblogs.com/lsswudi/p/11409135.html