Self-Assessment Exercises
Chapter 6:
Event-Driven Programming
1.
Suppose you are creating a class that responds to mouse clicks. Which
import
should you use?
a.
import java.awt.event;
b.
import java.awt.mouse;
c.
import java.gui.event;
d.
import java.gui.mouse;
2.
Your class from the previous question uses the
MouseListener
interface. How many methods must you implement for
MouseListener?
a.
0
b.
1
c.
3
d.
5
3.
The Java framework provides a
Timer
class which can raise a(n) ________ whenever a specified amount of time has passed.
a.
Alarm
event
b.
Alarm
flag
c.
Clock
event
d.
Timer
event
4.
In order to use a
Timer
, you implement the
ActionListener
interface. This requires that you define the
actionPerformed()
method. Which of the following is the correct
actionPerformed()
method heading?
a.
private void actionPerformed( ActionEvent evt )
b.
public void actionPerformed( ActionEvent evt )
c.
private void actionPerformed( TimerEvent evt )
d.
public void actionPerformed( TimerEvent evt )
5.
A(n) ________ class is a class defined inside another class.
a.
anonymous
b.
inner
c.
inside
d.
nested
