JAVA APPLET PROGRAM TO FIND FACTORIAL OF THE GIVEN NUMBER

 import java.applet.Applet;

import java.awt.Button;

import java.awt.Color;

import java.awt.Frame;

import java.awt.Label;

import java.awt.TextField;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.JOptionPane;

import static javax.swing.JOptionPane.WARNING_MESSAGE;

 

public class FactApplet extends Applet implements ActionListener {

       Label one=new Label("Enter any No:");

       Label Two=new Label("Factorial :");

      

       TextField tf1=new  TextField();

       TextField tf2=new  TextField();

      

       Button Compute=new Button("Compute");

       Frame f=new Frame("Calculator to Find Factorial");

        

       int p;

    @Override

    public void init() {

        one.setBackground(Color.MAGENTA); 

        one.setBounds(100, 100, 100, 30);

       f.add(one);

       tf1.setBackground(Color.PINK);

       tf1.setBounds(220, 100, 150, 30);

       f.add(tf1);

       tf1.addActionListener(this);

       Two.setBackground(Color.MAGENTA); 

       Two.setBounds(100, 150, 100, 30);

       f.add(Two);

       tf2.setBackground(Color.PINK);

       tf2.setBounds(220, 150, 150, 30);

       f.add(tf2);

       Compute.setBackground(Color.PINK);

       Compute.setBounds(200, 200, 100, 20);

       f.add(Compute);

       Compute.addActionListener((ActionListener) this);

          

       f.setSize(500,300);

       f.setLayout(null);

       f.setVisible(true);

    }

    

       @Override

    public void actionPerformed(ActionEvent ae){

       int i,n;

       p=1;

       n=Integer.parseInt(tf1.getText());

    

       if (n==0){

           p=0;

           JOptionPane.showMessageDialog(f, "You have Provided Null Value","Inane warning", JOptionPane.WARNING_MESSAGE);

                }

       if (ae.getActionCommand().equals("Compute")){

        for(i=1;i<=n;i++){

            p=p*i;

        }

           }

       tf2.setText(Integer.toString(p));

       repaint();

    }

}

 OUTPUT :