javacaps mock 2 Q:30

[Haining Mu]

30. Please select all correct answers?
A) java.awt.TextArea.SCROLLBARS_NONE
B) java.awt.TextArea does not generate Key events
C) java.awt.TextField generates Key events and Action events
D) java.awt.TextArea can be scrolled using the <-- and --> keys

Answer: A,C
Why C is correct? In API there is no addActionListener method for TextArea. Anybody explain please. If it can, how ?

[william shen]

Hi,Haining:
if you check the API of component class,you will find the addActionListener,because the TextField is a subclass of the component right!so the TextField do not override the addActionListener method.This action will response to the enter key!
Hope this will help you!

Originally posted by Haining Mu:
[B]

30. Please select all correct answers?
A) java.awt.TextArea.SCROLLBARS_NONE
B) java.awt.TextArea does not generate Key events
C) java.awt.TextField generates Key events and Action events
D) java.awt.TextArea can be scrolled using the <-- and --> keys

Answer: A,C
Why C is correct? In API there is no addActionListener method for TextArea. Anybody explain please. If it can, how ?[/B]

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[Jyotsna Umesh]

 

Originally posted by Haining Mu:
[B]

30. Please select all correct answers?
A) java.awt.TextArea.SCROLLBARS_NONE
B) java.awt.TextArea does not generate Key events
C) java.awt.TextField generates Key events and Action events
D) java.awt.TextArea can be scrolled using the <-- and --> keys

Answer: A,C
Why C is correct? In API there is no addActionListener method for TextArea. Anybody explain please. If it can, how ?[/B]

Can somebody please explain why D option is not correct becoz textarea can be scrolled using left and right arrow keys.
Thanx
Jyotsna