Factorial By Java

import javax.swing.*;
public class fact
{
public static void main(String w[])
{
int x;
x=Integer.parseInt(JOptionPane.showInputDialog("Enter number"));
int s=1;
if(x>1)
{ for(int i=1;i<=x;i++)
{s*=i;}
System.out.print("Factorial For " + x + " = " + s + "\n");
}
else
{
System.out.print("Wrong Value\n");
}
System.exit(0);
}
}