Why getContentPane()?

• The HelloWorld example required us to call getContentPane() before “add()”ing an object to the frame:

myFrameInstance.getContentPane().add(myComponent);

Usually

“this”

E.g.,

“myJButton”

• This differs from traditional AWT container additions, were we simply call “add”, passing in the component.

• Let’s cut a JFrame open to find out why . . .

Required of

JFrame, JDialog

and JInternalFrame

instances

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