added pattern question in which we have to draw an inverted hour glass

hacktober-1/src/invertedHourglass.java

@@ -0,0 +1,49 @@
+import java.util.Scanner;
+
+public class invertedHourglass {
+
+	public static void main(String[] args) {
+		// TODO Auto-generated method stub
+		Scanner scn = new Scanner(System.in);
+		int n = scn.nextInt();
+		int nst = 1;
+		int nsp = 2 * n - 1;
+		int count = 1;
+		int row = 1;
+		while (row <= 2 * n + 1) {
+			count = n;
+			int cst = 1;
+			while (cst <= nst) {
+				System.out.print(count + " ");
+				cst++;
+				count--;
+			}
+			int csp = 1;
+			while (csp <= nsp) {
+				System.out.print("  ");
+				csp++;
+			}
+			cst = 1;
+			while (cst <= nst) {
+				count++;
+				if (cst == 1 && row == n + 1) {
+					count++;
+					cst++;
+				}
+				System.out.print(count + " ");
+				cst++;
+			}
+			System.out.println();
+			if (row <= n) {
+				nst++;
+				nsp -= 2;
+			} else {
+				nst--;
+				nsp += 2;
+			}
+			row++;
+
+		}
+
+	}
+}

hacktober-1/src/rotateAnArray.java

@@ -0,0 +1,26 @@
+
+public class rotateAnArray {
+
+	public static void main(String[] args) {
+		// TODO Auto-generated method stub
+		int[] arr= {10,20,30,40};
+		rotate(arr,2);
+	}
+	public static void rotate(int[] a,int n) {
+
+		for(int i=0;i<n;i++) {
+			int temp=a[a.length-1];
+			for(int j=a.length-1;j>=1;j--) {
+
+				a[j]=a[j-1];}
+
+			 a[0]=temp;
+
+
+		  }
+		  for(int val:a) {
+			  System.out.print(val+" ");
+		  }
+
+	}
+}