6.b.Applet to compute factorial value

b) Develop an applet that receives an integer in one text field, and computes its factorial Value and returns it in another text field, when the button named “Compute” is clicked.

//

import javax.swing.*;

import java.awt.*;

import java.awt.event.*;

public class FactorialApplet extends JApplet implements ActionListener

{

JPanel p1,p2;

JLabel label1,label2;

JTextField input,result;

JButton compute;

public void init()

{

Container con=getContentPane();

con.setLayout(new BorderLayout());

label1=new JLabel("Enter the number : ");

label2=new JLabel("Factorial is : ");

input= new JTextField(5);

result= new JTextField(5);

compute =new JButton("Compute");

compute.addActionListener(this);

p1=new JPanel();

p2=new JPanel();

p1.setBackground(Color.pink);

p2.setBackground(Color.green);

p1.add(label1);

p1.add(input);

p1.add(label2);

p1.add(result);

p2.add(compute);

con.add(p1,BorderLayout.NORTH);

con.add(p2,BorderLayout.CENTER);

}

public void actionPerformed(ActionEvent ae)

{

int fact=1;

int number=Integer.parseInt(input.getText());

if (ae.getSource()==compute)

{

for (int i=1;i<=number;i++)

{

fact=fact*i;

}

result.setText(""+fact);

}

}

}