Java

自定义对象（重点）。自定义Student类，包含学号（整型）和成绩（浮点型）两个属性，请设计可初始化两个属性的构造函数，并在main函数中任意实例化10个Student对象放入List，按学号升序排序后，依次逐行在控制台通过重写后toString()输出学号xxx同学的成绩为xxx。

package asdasd;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;

class student {
	private int ID;
	private double score;
	public student() {}
	public student(int ID,double score) {
		// TODO Auto-generated constructor stub
		this.ID = ID;
		this.score = score;
	}
	public int GetID() {
		return this.ID;
	}
	public double GetScore() {
		return this.score;
	}
	
	@Override
	public String toString() {
		return "学号为"+ID+"同学的成绩为"+score;
	}
}

class MyCompare implements Comparator<student>{

	@Override
	public int compare(student o1, student o2) {
		// TODO Auto-generated method stub
		double s1 = o1.GetScore();
		double s2 = o2.GetScore();
		if(s1>s2)
			return 1;
		return 0;
	}
	
}

public class Mine {
	public static void main(String[] args) {
		List<student> sList = new ArrayList<>();
		for(int i=0;i<10;i++) {
			student students = new student(i,(i*1.2+123.3)/2.3);
			sList.add(students);
		}
		Collections.sort(sList,new MyCompare());
		for(student ssStudent:sList) {
			System.out.println(ssStudent);
		}
	}
	
}