java中,怎么在集合中输入数字，从大到小排序

public class Demo01 {
public static void main(String[] args) {
ArrayList list = new ArrayList();
Scanner sc = new Scanner(System.in);
int score=0;
for (int i=0;i<10;i++){
System.out.println("请输入第" + (i + 1) + "个同学的成绩");
score=sc.nextInt();
list.add(score);
}
System.out.println("没有排序之前");
System.out.print("\t"+list);

        System.out.println();

        Collections.sort(list);
        System.out.println("排序之后");
        System.out.println("\t"+list);
    }
}

Collections.sort(list, new Comparator<Integer>() {
            @Override
            public int compare(Integer o1, Integer o2) {
                return o2 - o1;
            }
        });

记得ArrayList用泛型

我帮你把代码整理了一下，你参考看看吧：

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

public class Demo01 {
    public static void main(String[] args) {
        List<Integer> list = new ArrayList<Integer>();
        Scanner sc = new Scanner(System.in);
        int score = 0;
        for (int i = 0; i < 10; i++) {
            System.out.println("请输入第" + (i + 1) + "个同学的成绩");
            score = sc.nextInt();
            list.add(score);
        }
        System.out.println("没有排序之前");
        System.out.print("\t" + list);

        System.out.println();

        Collections.sort(list);
        System.out.println("排序之后");
        System.out.println("\t" + list);

        Collections.reverse(list);
        System.out.println("反转排序之后");
        System.out.println("\t" + list);
    }
}

如有帮助，请采纳

list.sort(Comparator.reverseOrder());