import java.util.ArrayList;

import java.util.Collections;

public class Main {

    public static void main(String[] args) {

        ArrayList<String> arrayList = new ArrayList<String>();

        arrayList.add("A");

        arrayList.add("B");

        arrayList.add("C");

        arrayList.add("D");

        arrayList.add("E");

        System.out.println("反转前排序: " + arrayList);

        Collections.reverse(arrayList);

        System.out.println("反转后排序: " + arrayList);

    }

}