getContentPane() ...

Hi Experts,

    I am reading the JFrame in the Sun java tutorial. I saw JFrame has the following function :
   
    getContentPane() :  Returns the contentPane object for this frame.

    I don't know what "contentPane" is ... and I can not find the "contentPane" class or container it in the tutorial ....... could anyone please give me some directions ? Thanks a lot !

 meow.
LVL 1
meow00Asked:
Who is Participating?

Improve company productivity with a Business Account.Sign Up

x
 
objectsConnect With a Mentor Commented:
> we still use JFrame method setLayout() and add(), even though they are invoked by a pane rather than a frame ?

No, in fact you'll get an error if you do.
you should add your components to the content pane.
0
 
objectsCommented:
contentpane is the container that you add components to.
it is a Container.
0
 
objectsCommented:
ie. you don't add components to the frame, you instead add them to the content pane.

eg.

Container pane = frame.getContentPane();
pane.setLayout(new FlowLayout());
pane.add(new JLabel("X"));
0
Get expert help—faster!

Need expert help—fast? Use the Help Bell for personalized assistance getting answers to your important questions.

 
meow00Author Commented:
Thanks .... so is it true that : in the

 "pane.setLayout(new FlowLayout());
  pane.add(new JLabel("X")); "

 we still use JFrame method setLayout() and add(), even though they are invoked by a pane rather than a frame ?

  thanks !

0
 
zzynxConnect With a Mentor Software engineerCommented:
No, you use the Container setLayout() and add() then
0
 
TimYatesConnect With a Mentor Commented:
No, you are setting the layout of the bit of the frame that contains components...

You can't call JFrame.setLayout() or JFrame.add, as JFrame cannot contain components, or have a layout... that is the job of the content pane...

Think of the JFrame as the window border, and the title bar, and the close/minimise/maximise icons, and the contentPane as the bit that contains all of the controls...
0
 
zzynxSoftware engineerCommented:
Thank you
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.