How to Shuffle ArrayList in Java

In Java, if we want to shuffle an arraylist, we can call Collections.shuffle() method directly. Or we can write our own shuffle method:

import java.util.*;

public class Shuffle {
    public static void main(String[] args) {
        List<String> list = new ArrayList<>(Arrays.asList("either way is too late for regrets".split(" ")));
        System.out.println(list);
    
        Collections.shuffle(list);
        System.out.println(list);

        shuffle(list);
        System.out.println(list);
    }

    public static void shuffle(List<String> list) {
        List<String> temp = new ArrayList<>();
        Random r = new Random();
        while(!list.isEmpty()) {
            int loc = r.nextInt(list.size());
            temp.add(list.get(loc));
            list.remove(loc);
        }
        list.addAll(temp);
    }
}

The output of the above code is:

[either, way, is, too, late, for, regrets]
[for, late, either, regrets, too, way, is]
[too, either, for, regrets, is, way, late]