If the makeMenuItem method is called four times, at most how many different actions can be performed by these four newly created MenuItem objects when the doSomethingElse method is called?
public JMenuItem makeMenuItem(String menuLabel)
{
JMenuItem mi = new JMenuItem(menuLabel);
class MyMenuListener implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
doSomethingElse(e);
}
}
mi.addActionListener(new MyMenuListener());
return mi;
}
A)1
B)2
C)3
D)4

Question

If the makeMenuItem method is called four times, at most how many different actions can be performed by these four newly created MenuItem objects when the doSomethingElse method is called?
public JMenuItem makeMenuItem(String menuLabel)
{
   JMenuItem mi = new JMenuItem(menuLabel);
   class MyMenuListener implements ActionListener
   {
      public void actionPerformed(ActionEvent e)
      {
         doSomethingElse(e);
      }
   }
   mi.addActionListener(new MyMenuListener());
   return mi;
}
A)1
B)2
C)3
D)4

Quizplus · Accepted Answer

Each newly created MenuItem object will have its own instance of the MyMenuListener class, which will call the doSomethingElse method when triggered. Therefore, each MenuItem can perform a different action when doSomethingElse is called. Since four MenuItem objects are being created, there can be up to four different actions performed.

If the MakeMenuItem Method Is Called Four Times, at Most