[javase]自定义泛型比较器 排序

package day13;

import java.util.Arrays;
import java.util.Comparator;

/**
* 自定义外部排序
*
* */
public class TestComparator {
public static void main(String[] args) {
Student1 student1=new Student1();
Student1 student2=new Student1();
Student1 student3=new Student1();
student1.setScore(97);
student2.setScore(99);
student3.setScore(80);
Student1[] stu= {student1,student2,student3};
Arrays.sort(stu,new MyCompare());
Arrays.stream(stu).forEach(System.out::println);
}
}
class MyCompare implements Comparator<Student1>{

@Override
public int compare(Student1 o1, Student1 o2) {
// TODO Auto-generated method stub
return -(o1.getScore()-o2.getScore());
}

}

class Student1 implements Comparator<Student1>{
private int score;

public int getScore() {
return score;
}
public void setScore(int score) {
this.score = score;
}
@Override
public int compare(Student1 o1, Student1 o2) {
return -(o1.score-o2.score);
}
@Override
public String toString() {
return "成绩是："+this.score;
}

}