Java - Slice any array at steps

In python we are able to do the following:

array = [0,1,2,3,4,5,6,7,8,9,10] new_array= array[::3] print(new_array) >>>[0,3,6,9]

Is there an equivalent to this in Java? I have been looking for this type of array slicing, but I have had no luck. Any help would be great, Thanks!


If you are using Java 8, then you can make use of streams and do the following:

int [] a = new int [] {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10}; // filter out all indices that evenly divide 3 int [] sliceArr = IntStream.range(0, a.length).filter(i -> i % 3 == 0) .map(i -> a[i]).toArray(); System.out.println(Arrays.toString(sliceArr));

<strong>Outputs</strong>: [0, 3, 6, 9]


There is a method in Arrays that might help.

int[] newArr = Arrays.copyOfRange(arr, 5,10);

It is obviously far less powerful the the python implementation.


Java has no built-in mechanism for this. You could write a helper function:

public static int[] sliceArray(int[] arr, int spacing) { int curr = 0; int[] newArr = new int[((arr.length - 1) / spacing) + 1]; for (int i = 0; i < newArr.length; ++i) { newArr[i] = arr[curr]; curr += spacing; } return newArr; }


Note that Michael's answer is better (or at least less verbose) if you can utilize Java 8.


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