Creating GUI Application in Java

This video demonstrates how to create a simple GUI application in Java. The GUI components covered in this video are JLabel, JPanel, JTextField, JFrame, and ActionListener.

import java.awt.*;
import java.awt.event.*;

import javax.swing.*;



public class SI extends JPanel{

JLabel pLabel=new JLabel("Principal");

JLabel rLabel=new JLabel("Rate");

JLabel tLabel= new JLabel("Time");

JLabel sLabel=new JLabel("Simple Interest");



//creating textfields

JTextField pText=new JTextField(10);

JTextField rText=new JTextField(10);

JTextField tText=new JTextField(10);

JTextField sText=new JTextField(10);



//create the button objects

JButton cButton = new JButton("Calculate");

JButton clear= new JButton("Clear");

public SI(){

setLayout(new GridLayout(5,2));

add(pLabel);

add(pText);

add(rLabel);

add(rText);

add(tLabel);

add(tText);

add(sLabel);

add(sText);

add(cButton);

add(clear);

cButton.addActionListener(new ButtonListener());

clear.addActionListener(new ButtonListener());

}



//creating buttonListener

private class ButtonListener implements ActionListener{

public void actionPerformed(ActionEvent e)

{

if(e.getSource()==cButton)

{

try{

double p=Double.parseDouble(pText.getText());

double r=Double.parseDouble(rText.getText());

double t=Double.parseDouble(tText.getText());

double simpleINt=(p*r*t)/100;

sText.setText(Double.toString(simpleINt));

}catch(Exception ex){

JOptionPane.showMessageDialog(null,"Invalid data entry");

}



}

if(e.getSource()==clear){

pText.setText("");

rText.setText("");

tText.setText("");

sText.setText("");



}

}



}



public static void main(String args[])

{

JFrame Display=new JFrame();

Display.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);



//creating an object of SI

SI sInterest=new SI();
//adding the panel to the frame
Display.add(sInterest);

Display.setSize(300,300);

Display.setVisible(true);

}



}