How to define an empty array in Java?

In Java, you can define an empty array using the following method:

1. Use array initializer:

int[] arr = new int[0];

1. Utilize the static methods of the Arrays class:

int[] arr = Arrays.copyOf(new int[0], 0);

1. Utilize the toArray() method of ArrayList.

int[] arr = new int[0];
arr = new ArrayList<Integer>().toArray(arr);

No matter how an empty array is defined, it will always create an array with length zero.