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Thread: My GUI programs will not display.

  1. #1
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    Exclamation 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();
    }
     
    }


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: My GUI programs will not display.

    Try waiting until AFTER all the components have been added before calling setVisibile()
    If you don't understand my answer, don't ignore it, ask a question.

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