1. The class AbstractButton is abstract. It is a sublcass of the JComponent class. It also implements two interfaces: ItemSelectable and SwingConstants. Fill in the blanks to complete the declaration of the class (case sensitive, check your spelling):

public ______ class AbstractButton ______ JComponent _______

ItemSelectable, SwingConstants

2.

The ItemSelectable interface has method declaration for addItemListener, which returns void and has a parameter of type ItemListener. Which of the following code is correct for this declaration?

a.		public addItemListener(ItemListener l);
b.		public abstract void addItemListener(ItemListener l);
c.		public void addItemListener(ItemListener l) { }
d.		public abstract void addItemListener(String l);