Program to display the factorial of a given whole number

Factorial.java

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+import java.math.BigInteger;
+import java.util.Scanner;
+
+public class Factorial {
+    static BigInteger x;
+
+    static BigInteger factorial(int n) {
+        if(n == 0)
+            return BigInteger.valueOf(1);
+
+        else{    
+            for(n = n - 1; n > 1; n--)
+                x = x.multiply(BigInteger.valueOf(n));
+
+            return x;
+        }
+    }
+
+    public static void main(String args[]) {
+        Scanner scanner = new Scanner(System.in);
+
+        System.out.print("Enter a whole number to display its factorial: ");
+        int n = scanner.nextInt();
+        x = new BigInteger(Integer.toString(n));
+
+        System.out.println("Factorial of " + n + " is: " + factorial(n));
+
+        scanner.close();
+    }
+}