單項選擇題

How can you create a listener class that receives events when the mouse is moved？（）

A. By extending MouseListener.
B. By implementing MouseListener.
C. By extending MouseMotionListener.
D. By implementing MouseMotionListener.
E. Either by extending MouseMotionListener or extending MouseListener.
F. Either by implementing MouseMotion Listener or implementing MouseListener.

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多項選擇題

import java.awt.*；
public class X extends Frame {
public static void main （String args） {
X x = new X（）；
x.pack（）；
x.setVisible（true）；
}
public X（） {
setLayout （new BordrLayout（））；
Panel p = new Panel （）；
add（p， BorderLayout.NORTH）；
Button b = new Button （“North”）；
p.add（b）：
Button b = new Button （“South”）；
add（b1， BorderLayout.SOUTH）：
}
}
Which two statements are true？（）

A. The buttons labeled “North” and “South” will have the same width.
B. The buttons labeled “North” and “South” will have the same height.
C. The height of the button labeled “North” can very if the Frame is resized.
D. The height of the button labeled “South” can very if the Frame is resized.
E. The width of the button labeled “North” is constant even if the Frame is resized.
F. The width of the button labeled “South” is constant even if the Frame is resized.

單項選擇題

Which type of event indicates a key pressed on a java.awt.Component？（）

A. KeyEvent
B. KeyDownEvent
C. KeyPressEvent
D. KeyTypedEvent
E. KeyPressedEvent

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How can you create a listener class that receives events when the mouse is moved？（）

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Which type of event indicates a key pressed on a java.awt.Component？（）

How can you create a listener class that receives events when the mouse is moved？（）

Which type of event indicates a key pressed on a java.awt.Component？（）