Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.java.gui > #5370

Basic program flow

Show all headers | View raw

I just started trying to learn java coming from C++. Being a C++ guy, I 
must understand the details.


What is going on, as I debug through the static main method, my window 
is created and it is displayed, and responds. Yet, the debugger steps 
out of main...Which I would think exits the program.

Indeed I see threads in the debugger that look like it is in some built 
in method for exiting the program.

Did I make a new thread when I created a frame? If so, at what point? 
Why doesn't the program exit after main is done? What keeps it alive? 
Remember I am coming from the C Windows API and am used to a windows 
message pump...i.e. a loop where the program is executing, by 
dispatching messages.

Did I make a basic frame correctly? There seems to be 900 different ways 
of doing it.




I made this, doing my best to follow tutorials on the net:
----------------------------------------------------------------------------
import java.awt.*;
import java.awt.event.*;

import domain.*;

public class Application extends Panel implements WindowListener
{
	///
	private static final long serialVersionUID = 5321647437323807661L;

	///
	public static void main(String[] args)
	{		
		Frame frame = new Frame("Application Frame");
		Application application = new Application();
		frame.addWindowListener(application);
		application.initialize();
		
		frame.setSize(300,200);
         frame.setLocationByPlatform(true);
		frame.add("Center", application);
		frame.pack();
		frame.setVisible(true);
	}
	
	///
	public void initialize()
	{
		Card card = new Card();
		card.SetName("Shenanigans");
		
		System.out.format("The card name is: %s %n", card.GetName());
		System.out.print("Done.");
	}
	
	///
	public void windowDeactivated(WindowEvent e)
	{
	}
	
	///
	public void windowDeiconified(WindowEvent e)
	{
	}
	
	///
	public void windowIconified(WindowEvent e)
	{
	}
	
	///
	public void windowOpened(WindowEvent e)
	{
	}
	
	///
	public void windowActivated(WindowEvent e)
	{	
	}
	
	///
	public void windowClosed(WindowEvent e)
	{
	}

	///
	public void windowClosing(WindowEvent e)
	{
	    System.exit(0);
	}
}

Back to comp.lang.java.gui | Previous | Next — Next in thread | Find similar

Thread

Basic program flow Christopher Pisz <cpisz@austin.rr.com> - 2013-10-01 05:08 -0500
  Re: Basic program flow Joerg Meier <joergmmeier@arcor.de> - 2013-10-01 12:44 +0200
    Re: Basic program flow Daniele Futtorovic <da.futt.news@laposte-dot-net.invalid> - 2013-10-03 07:51 +0200
  Re: Basic program flow markspace <markspace@nospam.nospam> - 2013-10-01 09:17 -0700
    Re: Basic program flow Lew <lewbloch@gmail.com> - 2013-10-17 16:55 -0700
  Re: Basic program flow Jeff Higgins <jeff@invalid.invalid> - 2013-10-01 13:00 -0400
  Re: Basic program flow Roedy Green <see_website@mindprod.com.invalid> - 2013-10-01 21:47 -0700

csiph-web