Programs that ignore this rule may function correctly most of the time, but are subject to unpredictable errors that are difficult to reproduce.A note on thread safety: It may seem strange that such an important part of the Java platform is not thread safe. You don't need to write threading code to update the user interface from a background task. you are right we can find a way, but i mean from DRY (don't repeat yourself) point of view, the problem that has common solution, can be solved by them with minimum effort by Microsoft which will save a lot of time for programmers :) Threading code is often buggy and always hard to test. Beta thread Thread State Exception trying to restart Alpha. Expected since aborted threads cannot be restarted.Swing event handling code runs on a special thread known as the event dispatch thread.
All other Swing component methods must be invoked from the event dispatch thread.
As far as I can understand, every time I open or close the door, a Backgroudn Worker will be instantiated and never disposed.
This is a shorter post with a small solution to a problem, but I wanted to add it here for my own reference.
The advantage of threading is the ability to create applications that use more than one thread of execution. If this succeeds, it adds the rest (four in this example). It also demonstrates the methods used in processing the mutex object.
For example, a process can have a user interface thread that manages interactions with the user and worker threads that perform other tasks while the user interface thread waits for user input. The thread pool will then put work items into available threads.