Top 3 SWT Exceptions
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The document discusses the top 3 SWT exceptions: 1. Out of Handles Error which occurs when there are no more OS handles for requested resources. Proper disposal of resources is needed to avoid this. 2. Invalid Thread Access Exception which occurs when accessing widgets from non-UI threads, in violation of SWT's single-threaded model. AsyncExec and SyncExec should be used. 3. Widget is Disposed Exception which occurs when accessing a widget that has already been disposed. Widget disposal must be checked before access.
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3. The document then discusses the applet lifecycle, including initialization, running, idle, and destroyed states, and the methods corresponding to each state. It also provides examples of creating a basic "Hello World" applet and displaying graphics within an applet.
java Unit4 chapter1 applets
Applet Basics,
Applet Organization and Essential Elements,
The Applet Architecture,
A Complete Applet Skeleton,
Applet Initialization and Termination,
Requesting Repainting
The update() Method,
Using the Status Window
Passing parameters to Applets
The Applet Class
Event Handling The Delegation Event Model
Events,
Using the Delegation Event Model,
More Java Keywords.
Applets
The document discusses Java applets and their core components. It explains that applets are Java programs that run within web browsers. Applets have a lifecycle of initialization, starting, painting, and stopping methods. The document provides details on how to write, compile, and embed a basic "Hello World" applet in an HTML file for testing. It also covers key classes like Graphics, Color, and Font used for applet graphics and UI.
Gui
This document discusses the evolution of graphical user interface (GUI) capabilities in the Java programming language. It describes the Abstract Window Toolkit (AWT) introduced in JDK 1.0, which provided basic cross-platform GUI functionality but had limitations. JDK 1.1 improved on AWT with an event delegation model. JDK 1.2 introduced Swing, a richer GUI library that better integrated with native operating system look and feels. Swing components are lightweight compared to heavyweight AWT components. The document also covers GUI component classes, layout managers, menus, labels and event handling in Java GUI programming.
Unity3D Programming
The document provides an overview of a presentation on Unity game engine programming. It introduces the presenter and their background and experience. It then outlines the topics to be covered, including Unity engine API model, scripting languages like C# and JavaScript, Unity game object structure, and examples. It lists some advanced programming topics that may not have enough time to cover. It encourages attendees to learn programming on their own and notes the presentation is subject to time limitations. It provides a disclaimer and says to stay tuned for future Unity workshop announcements.
UIAutomation + Mechanic.js
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The java rogramming swing _tutorial for beinners(java programming language)
The java rogramming swing _tutorial for beinners(java programming language)Daroko blog(www.professionalbloggertricks.com)
Java programming presentations By Daroko blog
Do not just read java as a programmer, find projects and start making some Money, at DAROKO BLOG,WE Guide you through what you have learned in the classroom to a real business Environment, find java applications to a real business Environment, find also all IT Solutions and How you can apply them, find the best companies where you can get the IT jobs worldwide, Find java contract, Complete and start making some cash, find clients within your Country, refer and get paid when you complete the work.
Not Just a contact, at daroko Blog (www.professionalbloggertricks.com/),you are also being taught how you can apply all IT related field in real world.
Simply Google, Daroko Blog or visit (www.professionalbloggertricks.com/) to Know More about all these service now.
Do not just learn and go, apply them in real world.
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Lightning Talk - Xamarin
Xamarin is a mobile application development platform for building native and cross-platform apps using C# and .NET. It was started in 2011 and was originally based on Mono. It allows developers to write native Android, iOS, and Windows apps with shared code and libraries, and developers can use C# with Xamarin.Forms to write cross-platform UIs. Xamarin apps provide full access to native APIs and can be developed in Visual Studio. The platform has over 20,000 customers, 375,000+ developers, and a small team of 76 employees.
UIAutomator
The UIAutomator framework allows testing of Android applications through the user interface in an automated way. It works by using the uiautomatorviewer tool to inspect app layouts and UI elements, and the uiautomator API to programmatically interact with elements and assert results. Key classes include UIDevice for device actions, UISelector for locating elements, UIObject for interacting with elements, and UIScrollable for scrolling. The document provides examples of using these classes to perform actions like clicking buttons, opening menus, and scrolling to locate elements.
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Top 3 SWT Exceptions
- 1. Top 3 SWT Exceptions Lakshmi P Shanmugam Eclipse SWT Team IBM
- 4. Out of Handles Error when there are no more OS handles for the requested resources
- 11. Invalid Thread Access Exception when we access a widget from a non-UI thread
- 17. Widget is Disposed when we try to access a widget which is already disposed
- 20. Thank you
Editor's Notes
- asyncExec - Causes the <code>run()</code> method of the runnable to be invoked by the user-interface thread at the next reasonable opportunity. The caller of this method continues to run in parallel, and is not notified when the runnable has completed. Specifying <code>null</code> as the runnable simply wakes the user-interface thread when run.
- Since other things can happen in the UI thread between the call to asyncExec and the execution of your runnable, you can never be sure what state your widgets are in by the time your runnable executes