W3School TIY Editor

import java.util.ArrayList; import java.util.Collections; // 导入 Collections 类 public class Main { public static void main(String[] args) { ArrayList<Integer> myNumbers = new ArrayList<Integer>(); myNumbers.add(33); myNumbers.add(15); myNumbers.add(20); myNumbers.add(34); myNumbers.add(8); myNumbers.add(12); Collections.sort(myNumbers, Collections.reverseOrder()); for (int i : myNumbers) { System.out.println(i); } } }