l$**$factorial method. A$.$ Requirements

Please write a Java program named as DemoYourLastName, so that it runs as follows:

As the figure below, it requests the user to enter his$/$her name via a pop$-$up window.?

Enter your name:

John Smith

javac D$\backslash$epsilonjava DemoAN

javac DemoAN.java

java DemoAN

java DemoAN

After the user provides his$/$her name and click OK button, the program requests the

user to provide his$/$her income as follows via a pop$-$up window:java DemoAN

javac DemoAN.java

java DemoAN

java DemoANAfter the user provides the income and clicks OK button, the program outputs

information as follows via a pop$-$up window: java

javac DemoAN. java

$.$java DemoAN

javac DemoAN.java

java DemoAN

B$.$ Submissions

Your program $($DemoYourLastNameijava$)[80$ marks$]$

Screenshots to show all the $3$ steps $[20$ marks$]$

$*8$

public class FactorialDemo

$\{\{$ int number; $//$ To hold a number input $=$ JOptionPane.showInputDialog$("$Enter a $"+$ number $=$ Integer,parseInt$($input$)$; JOptionPane. showMessageDialog$($null$,$ System.exit$(0)$;l$**$ the factorial of its argument, which is assumed Bparam n The number to use in the calculation.$*/\{$ return $1$; $//$ Dase case return n $*$ factorial$($n $-1)$;$\}$