closing JFrame without terminating program

[chirag123]

There are two frames and when you click on a button on the first frame it opens the second frame. On the second frame I'm trying to create a button which when pressed closes the JFrame without terminating the program but I'm having no luck. This is the code that I'm trying to use for the second frame, which without the button compiles fine:

class Time_First_Depot extends JFrame
{	
	Time_First_Depot()
	{
		Container c = getContentPane(); \\ creates content pane
		c.setLayout ( null );
		
		Color b = new Color(100,200,255); \\ set colour of JFrame 
		c.setBackground( b );
		
		JButton exit = new JButton("EXIT"); \\creats button
		exit.addActionListener(new ExitButtonListener()); \\ adds listener to button
		
		exit.setForeground(Color.BLUE); \\edits buton
		exit.setFont(new Font("Time", Font.BOLD, 12));
		
		c.add(exit);\\adds button
		
		exit.setBounds(250, 375, 90, 30);\\ sets location of button
		
		Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
		this.setBounds((int) screenSize.getWidth()/2 - 370, (int) screenSize.getHeight()/2 - 300, 600, 450);  // set position and size
		this.setResizable(false);
		this.setDefaultCloseOperation(DISPOSE_ON_CLOSE);

		this.setTitle("Time");
		this.setVisible(true);
		this.setResizable(false);
	}
}

class ExitButtonListener implements ActionListener
{
	ExitButtonListener(){}
            public void actionPerformed(ActionEvent e)
            {
            	    if (e.getActionCommand().equals("EXIT"))
            	    {

            	    	    this.dispose();
            	    }
            }
}

however, when i try to compile it the following message comes up:


cannot find symbol
symbol : method dispose()
location: class ExitButtonListener
this.dispose();

[Fubarable]

Your solution: Don't use a second JFrame but rather have the second window be a JDialog since it is truly acting as a dialog of the first window. And to answer your next question, yes, a JDialog can hold as complex a GUI as any JFrame.


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[chirag123]

Thanks for that Fubarable.

I know this may sound silly but I'm new to java. I'm not sure what you mean by dialog (excuse my inexperience). My teachers brief is to create a program for a bus company. The first window is basically the main menu which has links to the other frames. Not sure how that impacts on dialog but thought perhaps some more information may help clarify things.

[Fubarable]

You should go to the source: Lesson: Using Swing Components (The Java™ Tutorials)

[chirag123]

Thanks for that after reading that I understand what a dialog box is but that's not quite what I'm trying to achieve. The code that I pasted is supposed to give the time from one bus depot to another bus depot, when the user selects using buttons which depots they start at and finish at and that part of the code is functioning fine so I didn't bother copying needless coding which isn't relevant to the question. Looking back perhaps I should have and it would have been clearer

[chirag123]

Thanks for your help, thought I'd post the solution which may help other people:

		JButton exit = new JButton("EXIT");
		exit.addActionListener(new ActionListener() 
		{
			public void actionPerformed(ActionEvent e)
			{
				dispose();
			}
		});