Does Method.invoke create another thread of execution?

Does the method.invoke function create another thread of execution? Because when I used it to call a GUI application's main method, the inv开发者_运维问答oke method returned immediately and the program and the GUI application were running at the same time.

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No.

The behaviour you observe is caused by the fact that the GUI library starts an Event Dispatch Thread when initialized, and all following GUI-related work is performed by that thread.

EDIT Here is a simple Swing GUI application:

public class Test {
    public static void main(String[] args) throws Exception {
        JFrame frame = new JFrame("Hello, world!");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
        System.out.println("Main method returns");
    }
}

If you run it, you will see that all these methods are non-blocking, therefore main method returns immediately after GUI is set up, and further work is performed by Event Dispatch Thread.

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No. Method.invoke is working just like a normal method. If it is not you expect, maybe it throws Exception. Did you wrap the invocation?

Also, a snippet will help a lot