ArrayToListAndListToArray

Main.java

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.stream.Collectors;

public class Main {
    public static void main(String[] args) {
        Integer[] array = new Integer[] { 1, 2, 3, 4 };
        List<Integer> list = new ArrayList<>();
        // list = Arrays.asList(array);
        // list = Arrays.stream(array).collect(Collectors.toList());
        Collections.addAll(list, array);
        Integer[] array2 = new Integer[list.size()];
        array2 = list.toArray(array2);
        for (Integer i : array2) {
            System.out.println(i);
        }
    }
}