Integer[] arr = {1,2,3,4,5};
Collections.rotate(Arrays.asList(arr), -3);
System.out.println(Arrays.toString(arr));

[4, 5, 1, 2, 3]

int [] a = {1,2,3,4,5};
    int [] b = new int[a.length];
    Arrays.setAll(b, (int i) -> a[(i+3)%a.length]);
    System.out.println("a="+Arrays.toString(a));
    System.out.println("b="+Arrays.toString(b));

a=[1, 2, 3, 4, 5]
b=[4, 5, 1, 2, 3]

int[] buffer = new int[placesToShift];
// Save the start of the array in the buffer
System.arraycopy(array, 0, buffer, 0, placesToShift);
// Copy the rest of the array into place
System.arraycopy(array, placesToShift, array, 0, array.length - placesToShift);
// Copy the buffer into the end
System.arraycopy(buffer, 0, array, array.length - placesToShift, buffer.length);

for (int i = 0; i < placesToShift; i++) {
    int firstElement = array[i];
    System.arraycopy(array, 1, array, 0, array.length - 1);
    array[array.length - 1] = firstElement;
}

final int first = 0;
int currIndex = first;
int temp = a[currIndex];
do {
    int nextIndex = (currIndex + 3) % a.length;
    a[currIndex] = (nextIndex == first) ? temp : a[nextIndex];
    currIndex = nextIndex;
} while (currIndex != first);