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Thread: GUI doesn't work when synchronized method is run

  1. #1
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    Default GUI doesn't work when synchronized method is run

    Hi,

    I have an app with a main object (containing Swing GUI) and a supporting thread which calls on the handle() method of the object.

    I noticed that when the handle() method is synchronized, while the thread is using the handle() method, the GUI on the main object are unresponsive. Code:

    public synchronized void handle()){
    //method code
    }


    i remove the synchronized keyword from handle(), the GUI is responsive even when the thread is using the handle() method.

    An interesting thing to note is that when I used another object as a lock, the GUI becomes responsive again when the thread is using the handle() method. Code:

    public void handle(){
    synchronized(anotherObj){
    //method code
    }
    }

    This suggests that Swing GUI uses methods that are synchronized. Am I right? Feel free to point me to any resources - couldn't quite find what I wanted.

    Thanks.


  2. #2
    Crazy Cat Lady KevinWorkman's Avatar
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    Default Re: GUI doesn't work when synchronized method is run

    Without an SSCCE, I'm only guessing, but it sounds like you're locking up the Event Dispatching Thread (EDT). Don't do that.
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