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Thread: frame closing programmatically

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    Default frame closing programmatically

    I want to close a Frame automatically not by clicking the close button. I want it to be closed programmaticaly.


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    Administrator copeg's Avatar
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    Default Re: frame closing programmatically

    Either
    frame.dispose();
    or
    frame.setVisible(false);

    The first will actually dispose of the JFrame and all of its components, the second just make it invisible if you ever want to make it visible again during the duration of the program.

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    Default Re: frame closing programmatically

    but each of them that I use I get the following error;
    "Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException"

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    Default Re: frame closing programmatically

    Post an SSCCE* or it didn't happen. (link below)
    * SSCCE : Java Glossary

    db

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    Default Re: frame closing programmatically

    Make sure that the frame you are trying to dispose of exists and is running:

    if (frame != null)
    {
         frame.dispose();
    }

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    Default Re: frame closing programmatically

    thank you for your point. when I check if the frame is null it returns null but I can see that the frame is open and it is not closed. how is it possible?

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    Default Re: frame closing programmatically

    So where's that SSCCE?

    db

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    Default Re: frame closing programmatically

    I am still patient!

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    Default Re: frame closing programmatically

    Good for you.

    db

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    Default Re: frame closing programmatically

    good for you that don't have the answer to my question.

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