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Java Program to right rotate the elements of an array
Here is a program that demonstrates how to right rotate the elements of an array in Java:
The rightRotate method takes in 3 arguments; the array, how many elements to rotate, and the length of the array.
It then loops k times, where on each iteration the last element of the array is stored in a temporary variable, and then each element of the array is shifted one place to the right. At the end of each iteration, the first element of the array is assigned the value of the temporary variable.
You can rotate the array multiple times by increasing the value of k or by running the loop again.
class ArrayRightRotate
{
public void rightRotate(int[] arr, int k, int n) {
for (int i = 0; i < k; i++) {
int temp = arr[n - 1];
for (int j = n - 2; j >= 0; j--) {
arr[j + 1] = arr[j];
}
arr[0] = temp;
}
}
}
public class Main {
public static void main(String[] args) {
ArrayRightRotate ar=new ArrayRightRotate();
int[] arr = {1, 2, 3, 4, 5};
int n = arr.length;
int k = 2; // rotate by 2 elements
ar.rightRotate(arr, k, n);
for (int i = 0; i < n; i++) {
System.out.print(arr[i] + " ");
}
}
}
The above program creates an array arr of integers and assigns it the values {1, 2, 3, 4, 5}. It then defines a variable k that represents the number of elements by which the array should be rotated to the right. In this case, k is set to 2, so the array will be rotated by 2 elements to the right.
The rightRotate method takes in 3 arguments; the array, how many elements to rotate, and the length of the array.
It then loops k times, where on each iteration the last element of the array is stored in a temporary variable, and then each element of the array is shifted one place to the right. At the end of each iteration, the first element of the array is assigned the value of the temporary variable.
You can rotate the array multiple times by increasing the value of k or by running the loop again.
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