Rotate Array in Java

src/main.java → src/helloworld.java

@@ -1,4 +1,4 @@
-public class main {
+public class helloworld {
 
     public static void main(String[] args) {
         System.out.println("Hello, World!");

src/part_one/GFG.java

@@ -0,0 +1,47 @@
+package part_one;
+
+public class GFG {
+
+    void leftRotate(int arr[], int d, int n)
+    {
+        // Creating temp array of size d
+        int temp[] = new int[d];
+
+        // Copying first d element in array temp
+        for (int i = 0; i < d; i++)
+            temp[i] = arr[i];
+
+        // Moving the rest element to index
+        // zero to N-d
+        for (int i = d; i < n; i++) {
+            arr[i - d] = arr[i];
+        }
+
+        // Copying the temp array element
+        // in original array
+        for (int i = 0; i < d; i++) {
+            arr[i + n - d] = temp[i];
+        }
+    }
+
+    void printArray(int arr[], int n)
+    {
+        for (int i = 0; i < n; i++)
+            System.out.print(arr[i] + " ");
+    }
+
+    public static void main(String[] args) {
+        System.out.println("Rotate Array in Java");
+        //Test
+        GFG rotate = new GFG();
+
+        // Custom input array
+        int arr[] = { 1, 2, 3, 4, 5 };
+
+        // Calling method 1 and 2 as defined above
+        rotate.leftRotate(arr, 2, arr.length);
+        rotate.printArray(arr, arr.length);
+
+    }
+
+}