GUI Rectangle 3 - Java Sample Program

//Java program to create a window and place four labels and four text fields
//Filename: RectangleProgramThree.java

import javax.swing.*;
import java.awt.*;
public class RectangleProgramThree extends JFrame
{
private static final int WIDTH = 400;
private static final int HEIGHT = 300;
private JLabel lengthL, widthL, areaL, perimeterL;
private JTextField lengthTF, widthTF, areaTF, perimeterTF;

public RectangleProgramThree()
{
setTitle("Area and Perimeter of a Rectangle");
lengthL =
new JLabel("Enter the length: ", SwingConstants.RIGHT);
widthL =
new JLabel("Enter the width: ", SwingConstants.RIGHT);
areaL =
new JLabel("Area: ", SwingConstants.RIGHT);
perimeterL =
new JLabel("Perimeter: ", SwingConstants.RIGHT);

lengthTF = new JTextField(10);
widthTF = new JTextField(10);
areaTF = new JTextField(10);
perimeterTF = new JTextField(10);
Container pane = getContentPane();

pane.setLayout(new GridLayout(4, 2));
pane.add(lengthL);
pane.add(lengthTF);
pane.add(widthL);
pane.add(widthTF);
pane.add(areaL);
pane.add(areaTF);
pane.add(perimeterL);
pane.add(perimeterTF);

setSize(WIDTH, HEIGHT);
setVisible(true);
setDefaultCloseOperation(EXIT_ON_CLOSE);
}

public static void main(String[] args)
{
RectangleProgramThree rectObject = new RectangleProgramThree();
}
}

********Sample Output********