A number is perfect square or not

PerfectSquareOrNot.java

@@ -0,0 +1,17 @@
+import java.util.*;
+public class PerfectSquareOrNot {
+    public static void main(String[] args) 
+    {
+        Scanner sc = new Scanner(System.in);
+        int num = sc.nextInt();
+        double res = Math.sqrt(num);
+        if((int)res == res)
+        {
+            System.out.println("Perfect Square");
+        }
+        else
+        {
+            System.out.println("Not a perfect square");
+        }
+    }
+}