[Java] Arrays.sort()昇順と降順

昇順に並べたいなら、
Arrays.sort(arr);
降順に並べたい場合は、
Arrays.sort(arr, Collections.reverseOrder());

package DM20220402;

import java.util.Arrays;
import java.util.Collections;

public class Sort {
    public static void main(String[] args) {
        String arr[] = {"apple","orange","banana","pear","peach","melon"};

        Arrays.sort(arr);
        for (String i : arr) {
            System.out.print("["+i+"]");
        }
        System.out.println();
        Arrays.sort(arr, Collections.reverseOrder());
        for (String i : arr) {
            System.out.print("["+i+"]");
        }
    }
}

(結果)

[apple][banana][melon][orange][peach][pear]
[pear][peach][orange][melon][banana][apple]