SwingUtilities.invokeLater() why is it needed?

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Swing objects are not thread safe. SwingUtilities.invokeLater() allows a task to be executed at some later point in time, as the name suggests; but more importantly, the task will be executed on the AWT event dispatch thread. When using invokeLater, the task is executed asynchronously; there’s also invokeAndWait, which won’t return until the task has finished executing.

Some information about the decision not to make Swing thread-safe can be found here: Multithreaded toolkits: A failed dream? [Archived]

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