java 基于comparator的比较器

import java.util.Comparator;
 class Student {
    private String name;
    private int age;
    public Student(String name,int age){
        this.name=name;
        this.age=age;
    }
    public boolean equals(Object obj){
        if(this==obj){
            return true;
        }
        if(!(obj instanceof Student)){
            return false;
        }
        Student stu=(Student) obj;
        if(stu.name.equals(this.name)&&stu.age==this.age){
            if(stu.name.equals(this.name)&&stu.age==this.age){
                return true;
            }else {
                return false;
            }
        }
    
    }
    public String toString(){
        return name+"\t\t"+age;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
};
 class StudentComparator implements Comparator<Student>{
    public int compare(Student s1,Student s2){
        if(s1.equals(s2)){
            return 0;
        }else if(s1.getAge()<s2.getAge()){
            return 1;
        }else {
            return -1;
        }
    }
}
public class comparatotdemo {
    public static void main(String[] args) {
        Student stu[]={
                new Student("Lisi",20),
                new Student("zs",22),
                new Student("ww",20),
                new Student("zl",20),
                new Student("sq",22)
        };
        java.util.Arrays.sort(stu,new StudentComparator());
        for(int i=0;i<stu.length;i++){
            System.out.println(stu[i]);
        }
    }
}

与Comparable接口相比，明显Comparator是一种补救 的方法，所以，Comparable接口明显比Comparator方便。。。