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Previous page: Initial Threads Next page: Worker Threads and SwingWorker FAQs Search RecentTopics FlaggedTopics HotTopics Best Topics Register / Login Post Reply Bookmark Topic Watch Topic New Topic programming forums Java I am honoured that you take the time to read my writing :-) NEW: Please see our new "Extreme Java" course, combining concurrency, a little bit of performance and Java 8. Why are you not receiving more info? and is not sponsored by Oracle, Inc.

How do I answer why I want to join a smaller company given I have worked at larger ones? Most tasks are invocations of event-handling methods, such as ActionListener.actionPerformed. Somewhere within your code you are trying to do something with a variable that is currently equal to null. Edit 1: Some additional infos.

This means GUI is a shared data structure and some synchronization is needed to ensure that only one thread accesses it at a time. The AWT uses a single-threaded painting model in which all screen updates must be performed from a single thread. The Container had to check the source for each event before processing.Let's just say that the Java 1.0 event model died a quick death when the JavaBeans component model was introduced Please explain the error so that i can make sure not to repeat it.

Truth in numbers Can an ATCo refuse to give service to an aircraft based on moral grounds? No? Some Swing component methods are labelled "thread safe" in the API specification; these can be safely invoked from any thread. Access to the GUI is serialized and other threads may submit some code to be executed in the EDT through a EDT message queue.

A note on thread safety:It may seem strange that such an important part of the Java platform is not thread safe. It's useful to think of the code running on the event dispatch thread as a series of short tasks. TH Solve and naming variables Did Sputnik 1 have attitude control? Failed to start error in Apache Derby passing value and setting it to jlabel text All times are in JavaRanch time: GMT-6 in summer, GMT-7 in winter Contact Us | advertise

Is the NHS wrong about passwords? I guess you are looking at the wrong place IMHO, since you had added BorderLayout to the whole thingy, so you should be looking inside the BorderLayout class, which gets called Not the answer you're looking for? Choose your Java IDE Android Studio for beginners: Code the app Immutable empty collections and iterators Open source Java projects: Docker Swarm Join the discussion Be the first to comment on

Swing, SWT, AWT, SwingX, JGoodies, JavaFX, Apache Pivot?1What is the use of keyboard polling?2Event call doesn't work with key bind or click - what's the logical error?0AWT-EventQueue-0 Error with KeyListener1Why do Near Earth vs Newtonian gravitational potential Any better way to determine source of light by analyzing the electromagnectic spectrum of the light How do I answer why I want to join Worker design pattern[edit] Both execution of a task in another thread and presenting the results in the EDT can be combined by means of worker design pattern. They have been good years, for which we are grateful.

John Zukowski puts his finger on it in this article. The messages may be well-known actions or involve callbacks, the references to user-methods that must be executed by means of EDT. Spawning a worker thread, EDT proceeds handling current message without waiting the worker to complete. Sum of neighbours Is intelligence the "natural" product of evolution?

Thus, if you want to show an error dialog for any throwable that happens in the AWT event dispatch thread or that causes a thread to terminate, then simply set a In the longer term, work through the Sun's Swing Tutorial to learn more about these issues. But only if you've configured Eclipse to generate debugging info. –Steve McLeod Dec 5 '08 at 11:35 It was doing it: what happened I think was that since the share|improve this answer answered Dec 5 '08 at 11:09 Flo add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign up

EDT consumes them one after another and responds by updating the GUI components. So consider whether you should delete the field. Heinz M. GUIDesign.jpg Paul Clapham Sheriff Posts: 21443 33 I like...

This riddle could be extremely useful House of Santa Claus At first I was afraid I'd be petrified Determine if a coin system is Canonical Why would a password requirement prohibit The important requirement imposed on all messages is that they must be executed quickly for the GUI to stay responsive. package com.reginildo.principal; import java.awt.BorderLayout; import java.awt.Container; import java.awt.EventQueue; import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.Date; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; @SuppressWarnings("serial") public class Principal extends JFrame { JLabel labelRelogio; public static Complaints?

What sense of "hack" is involved in five hacks for using coffee filters? For more on this issue, see the following entry in Graham Hamilton's blog: MultiThreaded toolkits: A failed dream? Two methods of these classes allow: synchronous code execution (SwingUtilities.invokeAndWait(Runnable) or EventQueue.invokeAndWait(Runnable)) and asynchronous code execution (SwingUtilities.invokeLater(Runnable) or

share|improve this answer answered Dec 5 '08 at 10:43 diciu 23.9k33755 Oh yeah, totally: but then eclipse would be nice about it and tell me in the debug view Please explain DateFormat class?help All times are in JavaRanch time: GMT-6 in summer, GMT-7 in winter Contact Us | advertise | mobile view | Powered by JForum | Copyright © 1998-2016 Somewhere in the stack trace you'll recognise the name of one of the classes/methods which you did write. If you've enjoyed reading this newsletter, please take a moment to "like" our group.

Will Monero CPU mining always be feasible? The constants our examples use are preferred because they are standard and enable programs to adjust to languages that have different orientations. In one there is the main program with the Satellite and others. Meaning of S.

Alexander Potochkin. In the main project's settings I have under "Properties" > "Java Build Path" > "Projects" the supporting project included.