left rotate an array by one GFG

 package com.company;

import java.util.Arrays;

public class Array8 {
    //    Left rotate of array by one
    public static int[] rotateLeft(int[] arr) {
        int n = arr.length;
        int a = arr[0];
        for (int i = 0; i < n - 1; i++) {
            arr[i] = arr[i + 1];
        }
        arr[n - 1] = a;
        return arr;
    }

    public static void main(String[] args) {
        int[] array = {0,0,0,1};
        System.out.println(Arrays.toString(rotateLeft(array)));
    }
}