How to close this window?

[miguel lisboa]

i just dont know how to code this very simple situation: i have this first window that has a button which when clicked opens a second window;
this second window has a button that when clicked should close just this window, not the app

can anyone please help me?

thanks in advance

the working code follows

import javax.swing.*;

public class OpenWindow {
	public OpenWindow() {
		JFrame frame = new JFrame("Open Window");
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

		JPanel panel = (JPanel)frame.getContentPane();

		JButton button = new JButton();
		button.setText("Open");

		button.addActionListener(new java.awt.event.ActionListener() {
			public void actionPerformed(java.awt.event.ActionEvent e) {
				new CloseWindow();
			}
		});

		panel.add(button);

		frame.setLocationRelativeTo(null);
		frame.pack();
		frame.setVisible(true);
	}

	public static void main (String args[]) {
		SwingUtilities.invokeLater(new Runnable() {
			public void run() {
				new OpenWindow();
			}
		});
	}
}

class CloseWindow {
	public CloseWindow() {
		JFrame frame = new JFrame("Close Window");
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

		JPanel panel = (JPanel)frame.getContentPane();

		JButton button = new JButton();
		button.setText("Close");

		button.addActionListener(new java.awt.event.ActionListener() {
			public void actionPerformed(java.awt.event.ActionEvent e) {
				System.out.println("action");
				System.exit(0); //doesnt work because closes everything, not just this window...
			}
		});

		panel.add(button);

		frame.pack();
		frame.setVisible(true);
	}
}
    

[Mohamed Sanaulla]

You can try using the "dispose()" method.

[miguel lisboa]

mohamed sanaullah wrote:You can try using the "dispose()" method.

then i get this error message:

C:\...\CloseWindow.java:17: cannot find symbol
symbol: method dispose()
dispose(); }
^
1 error

Tool completed with exit code 1

when using it this way:

		button.addActionListener(new java.awt.event.ActionListener() {
			public void actionPerformed(java.awt.event.ActionEvent e) {
//				System.out.println("action");
//				System.exit(0); //doesnt work because closes everything, not just this window...
				dispose();	// line 17		
				}
		});

[Mohamed Sanaulla]

You should be using JFrame instance to call it. Its part of Window (I think?) class which gets inherited by JFrame. Also you would have to declare your JFrame reference as final in the CloseWindow class. (final- because the variables being used in the Anonymous Inner class (your ActionListener) must be declared as final)

jFrameInstance.dispose();

Sorry for not being clear the first time.

[miguel lisboa]

thanks a lot - that worked!

public class CloseWindow {
	public CloseWindow() {
		final JFrame frame = new JFrame("Close Window");
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

		JPanel panel = (JPanel)frame.getContentPane();

		JButton button= new JButton();
		button.setText("Close");

		button.addActionListener(new java.awt.event.ActionListener() {
			public void actionPerformed(java.awt.event.ActionEvent e) {
				frame.dispose();
				}
		});

		panel.add(button);
		frame.pack();
		frame.setVisible(true);
	}
}   

[Rob Camick]

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);   

Don't you think you will have the same problem with the above statement?

[Mohamed Sanaulla]

Rob Camick wrote:

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);   

Don't you think you will have the same problem with the above statement?

The setDefaultCloseOperation would decide what to do with the JFrame when the user clicks on the Close button on the JFrame. I think by default it hides the Frame, but we would usually want to exit the Frame when we click on the Close button.

[Suganya Sampath]

I have also faced this problem.
This post has helped me to solve it.
Thank You