How to count total items of JCheckbox

I have a small application described below :
Five checkbox such as : Apple, Mango, Grape, Tangerine, Peach an one button.
Assume that I check apple, grape, when I click button, A message will show with content : You like apple, grape.

How can I do that ?

addactionListener to buttons
actionperformed(?) method, check the event source, use joptiondialog to popup dialog

Apply actionlistener for the JButton and call getActionCommand() on the ActionEvent object.like

Code:

---

public void actionPerformed(ActionEvent buttonevent)
{
if(buttonevent.getSource()==yourbuttonname)
{
System.out.println("Selected:"+buttonevent.getActionCommand();
}
}

---

getSource() return Object
cast it to JButton/Button before comparsion