Proper way to implement mouse events

I have code, it's below, that displays a photograph in the JPanel. Actually, the JPanel is walking through a photo album and I have it so that when the JPanel is clicked on, the panel advances to the next frame. I also have it configured so that if the JPanel is right-clicked on, a popup menu is displayed.

I read that, when implementing a popup menu, one needs to override both mousePressed() and mouseReleased() in order to catch the trigger for all platforms. However, since I have a listener associated with the JPanel, when the user clicks the window the JPanel advances two pho开发者_JAVA百科tos. This is understandable, but how should I code this so that I ensure I display the popup on all platforms (my professor may check my program on Linux and I have to code it on Windows at home).

JComponents have a property componentPopupMenu - setting that property makes your popupMenu appear automatically, without requiring any effort in a MouseListener

 photoPanel.setComponentPopupMenu(photoPopupMenu);

Then make sure that your mouse-triggered action (advancing to the next) happens only on single left pressed.

Use

MouseEvent.isPopupTrigger() 

to determine if for the platform the given event should be used to show the popup.

You would put this in each method (mousePressed and mouseReleased)