奖学金——充分发挥Java面向对象的特点

解题思路:

注意事项:

注意重写compareTo()时，是升序还是降序

参考代码:

import java.util.ArrayList;

import java.util.List;

import java.util.Scanner;

public class 奖学金 {

public static class S implements Comparable<S> {

int id;

int a;

int b;

int c;

public S(int id, int a, int b, int c) {

this.id = id;

this.a = a;

this.b = b;

this.c = c;

}

public int getSum() {

return a + b + c;

}

@Override

public int compareTo(S o) {

int k = 0;

k = Integer.compare(o.getSum(), getSum());

if (k != 0) {

return k;

}

k = Integer.compare(o.a, a);

if (k != 0) {

return k;

}

return Integer.compare(id, o.id);

}

}

public static void main(String[] args) {

Scanner sc = new Scanner(System.in);

int n = sc.nextInt();

List<S> list = new ArrayList<>(256);

for (int i = 0; i < n; i++) {

int a = sc.nextInt();

int b = sc.nextInt();

int c = sc.nextInt();

list.add(new S(i + 1, a, b, c));

}

list.sort(null);

for (int i = 0; i < 5; i++) {

S s = list.get(i);

System.out.println(s.id + " " + s.getSum());

}

}

}