Thread: My GUI programs will not display.

I am currently new to Java and I am trying to create a GUI but when i run my code nothing shows up except an empty box only showing the title. Can anyone explain what could possible be wrong?

import javax.swing.* ;
import java.awt.event.* ;
import java.awt.* ;
 
 
public class Airplane extends JFrame 
{
	private static final int WIDTH = 400;
	private static final int HEIGHT = 300;
	private JLabel reserveR;
	private JTextField reserveTF;
	private JButton yesB, noB;
	private CalculateButtonHandler cbhandler;
 
public Airplane()
{
	Container pane = getContentPane();
	pane.setLayout(new GridLayout(3,1));
	setTitle("Airplane Seating");
	setSize(WIDTH,HEIGHT);
	setDefaultCloseOperation(EXIT_ON_CLOSE);
	setVisible(true);
 
 
	reserveR= new JLabel("To reserve a ticket click Yes or No ", SwingConstants.CENTER);
	reserveTF = new JTextField(10);
 
 
	yesB = new JButton ("Yes");
	cbhandler = new CalculateButtonHandler();
	yesB.addActionListener(cbhandler);
 
	noB = new JButton ("No");
	cbhandler = new CalculateButtonHandler();
	noB.addActionListener(cbhandler);
 
 
	pane.add(reserveR);
	pane.add(yesB);
	pane.add(noB);
	pane.add(reserveTF);
 
}
private class CalculateButtonHandler implements ActionListener
{
	public void actionPerformed (ActionEvent event)
	{
		if ( event.getSource() == yesB)
		{
		System.exit(0);
		}
		else if ( event.getSource() == noB)
		{
			System.exit(0);
		}
	}
}
public static void main(String[] args)
{
    Airplane Airp = new Airplane();
}
 
}