[javaSE] 集合框架（TreeSet）

import java.util.TreeSet;


public class TreeSetDemo {


    /**
     * @param args
     */
    public static void main(String[] args) {
        TreeSet<Student> treeset=new TreeSet<Student>();
        treeset.add(new Student("taoshihan1",30));
        treeset.add(new Student("taoshihan2",20));
        treeset.add(new Student("taoshihan3",40));
        for(Student student:treeset){
            System.out.println(student.name+"==="+student.age);
        }
        
        
        
    }

}
class Student implements Comparable<Student>{
    
    public int age;
    public String name;
    public Student(String name,int age) {
        this.name=name;
        this.age=age;
    }
    @Override
    public int compareTo(Student o) {
        if(o.age<this.age){
            return 1;
        }else{
            return -1;
        }
    }
    
}