How Can I Programmatically Close a JFrame Like a User Would?

Programmatically Closing a JFrame

While the setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE) method provides a way to close a JFrame, it does not replicate the behavior of the user clicking the X close button or pressing the Alt F4 key combination. To achieve this behavior, the GUI needs to receive a window closing event.

One approach is to use the dispatchEvent method on the JFrame:

frame.dispatchEvent(new WindowEvent(frame, WindowEvent.WINDOW_CLOSING));

This line triggers the windowClosing() method in the frame's WindowListener, which will proceed with the standard closing process, including calling windowClosed(). This approach simulates the user explicitly closing the window and provides the desired sequence of events.

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