如何使JMenu项目在单击时执行某些操作

I'm making a GUI that has a Jmenu; it has the jmenu items that will be doing things when clicked. That is the problem. I've looked and looked, but I can't find out how to make it do something when clicked. Also, I am kind of a noob, so if you could make it do it in a pretty simple way, that would be great!I'm making a GUI that has a Jmenu; it has the j