How to create a JButton with an ActionListener that will allow me to quit JFrames .

[Mark Toddd]

Hi all.

Hope this makes sense, I've tried to work it out but no luck as yet. So here's my question.
How do I go about calling a class who's function is to exit a JFrame from more than one JFrame?

In my code below I have a JFrame with 2 JButtons. One that opens another instance of a JFrame and a JButton that quits the application. I would be like to be able to place another JButton that also quits on the second JFrame using the class code below thereby avoiding having to write it twice. Is this possible.

 static class Quit implements ActionListener {
		public void actionPerformed (ActionEvent e) {
			System.exit(0);
			
		}
	}   

again

package mygui;

import javax.swing.*;
import java.awt.*;
import java.awt.Color;
import java.awt.event.*;


public class FirstFrame {

	public static void main(String[] args) {
		
		JFrame myframe = new JFrame("my frame title");
		myframe.setVisible(true);
		myframe.setSize(300,200);
		myframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		
		JMenuBar mymenu = new JMenuBar();
		mymenu.setOpaque(true);
		mymenu.setBackground(new Color(154, 165, 127));
		mymenu.setPreferredSize(new Dimension(300,20));
		myframe.setJMenuBar(mymenu);
		
		JPanel mypanel = new JPanel();
		JLabel label = new JLabel("my label");
		JButton mybutton = new JButton("New Window");
		JButton exitbutton = new JButton("Exit");
		
		myframe.add(mypanel);
		mypanel.add(label);
		mypanel.add(mybutton);
		mybutton.addActionListener(new Thing());
		mypanel.add(exitbutton);
		exitbutton.addActionListener(new Quit()); //Quite first jframe
		
		
}
		
	static class Thing implements ActionListener {
		
		public void actionPerformed (ActionEvent e) {
			JFrame myframeB = new JFrame("frame number 2");
			myframeB.setVisible(true);
			myframeB.setSize(400,150);
			JPanel mypanelB = new JPanel();
			JLabel mylabelB = new JLabel("hi there");
			JButton exitbutton2 = new JButton("Quit");
			myframeB.add(mypanelB);
			mypanelB.add(mylabelB);
			mypanelB.add(exitbutton2);
			exitbutton2.addActionListener(Quit); //this ActionListener does not let me quit the second jframe.???
		}
	}

	static class Quit implements ActionListener {
		public void actionPerformed (ActionEvent e) {
			System.exit(0);
			
		}
	}
}

I'm a complete noob so any hints etc much appreciated.
Thanks guys.

[salvin francis]

Your indentations are not proper,

Lets analyze the issue, what does Quit class do when an action is performed:
It executes the function:

System.exit(0);

This is a call to stop your program and quit everything.
As i can guess, this is not the behavior you require.

There is a function called dispose() in Jframe that you might want to look at,

Also I see no purpose why Thing and Quit should be static classes.

[Maneesh Godbole]

Mark,
Welcome to the Ranch.

Having multiple base frames is a bad bad idea. Instead use a single JFrame and JDialog (check out JOptionPane for details on how to create and use modal dialogs)
Check out what JFrame#setVisible(boolean isVisible) does.

Swing related. Moving.
In future please post your UI questions in the Swing forum.
http://faq.javaranch.com/java/CarefullyChooseOneForum

[Mark Toddd]

Thanks for the tips guys.

I'll be studying Java toward the end of the year at uni and am trying to get to grips with some of the basics.
I'll be sure to post in the right forum next time.

cheers