Как соединить два массива java

int[] arr1 = {1,2,3};
             int[] arr2 = {4,5,6};

             int[] result = new int[arr1.length + arr2.length];
             System.arraycopy(arr1,0, result, 0, arr1.length);
             System.arraycopy(arr2,0, result, arr1.length, arr2.length);

             System.out.println(Arrays.toString(result));  // => [1, 2, 3, 4, 5, 6]