I would like to change the background color of my jMenuItems
on a rollover event :
Now it's blue, I want it white, how can I do ? (I use netbeans GUI)
You can use something like:
UIManager.put("MenuItem.selectionBackground", Color.WHITE);
Problem is this will change the color for all menu items, even those added to a JMenu.
To control which menu items are changed you will need to create a custom MenuItem UI to replace the default. You will then need to modify the code to use your custom selection background color.