How does JOptionPane.showMessageDialog(...); work exactly?

[quaint bane]

<@&987246399047479336> please have a look, thanks.

[quaint bane]

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[marsh gull]

When I have the following line :

the parentComponent is what exactly? An object which is your first screen in which the user interacts? The one from which the new screen popped out of for x reason?

[covert pike]

parentComponent is just the component that the dialog should display above

If you had a window with a component on the left side & a component on the right side, and you specified the left component as the parent for the dialog, the dialog will appear above the left component

[modern prawn]

^ right. Usually you have it open from an action like a button press, which is on a panel on a frame. You don't have to define it (I believe null works) but alot of JOptionPane options are overloaded which if you want to customize the window more than default, you can. Bro Code on YouTube covers SWING on his channel and did a video on this.