Develop an applet that receives an integer in one text field and compute its factorial value in another text field, when the button named ‘Compute” is clicked.

Develop an applet that receives an integer in one text field and compute its factorial value in another text field, when the button named ‘Compute” is clicked.

Program Code:

import java.awt.*;

import java.applet.*;

import java.awt.event.*;

/*<applet code="FactApplet" width=500 height=250> </applet>*/

public class FactApplet extends Applet implements ActionListener

{

TextField num, res;

Button b1;

public void init()

{

setLayout(null);

Label l1=new Label("Enter the Number:");

l1.setBounds(10,50,100,30);

num=new TextField();

num.setBounds(200,50,100,30);

Label l2=new Label("The Factorial is :");

l2.setBounds(10,100,100,40);

res=new TextField();

res.setBounds(200,100,100,40);

b1=new Button("Compute");

b1.setBounds(200,150,70,40);

add(l1);

add(l2);

add(num);

add(res);

add(b1);

b1.addActionListener(this);

}

public void actionPerformed(ActionEvent ae)

{

if((ae.getSource())==b1)

{

int n=Integer.parseInt(num.getText());

int i,fact=1;

for(i=1;i<=n;i++)

fact=fact*i;

res.setText(" "+fact);

}

}

}