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Asked: 2026-06-14T10:57:23+00:00

What will happen if we are creating the Java Swing application in main thread?

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What will happen if we are creating the Java Swing application in main thread? Rule of thumb is that we have to start the application in EDT??please help.

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  1. Editorial Team

    Q1. Rule of thumb is that we have to start the application in EDT

    Not really a rule of thumb – more like a requirement specified by the library:

    In general Swing is not thread safe. All Swing components and related classes, unless otherwise documented, must be accessed on the event dispatching thread.

    Q2. What will happen if we are creating the Java Swing application in main thread?

    It might work or not: the behaviour is unspecified. An example is given on that same page:

    If you modify the model on a separate thread you run the risk of exceptions and possible display corruption.

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