Difference between add() and getContentPane().add()?

[AcousticBruce]

What is the difference between getContentPane().add() and just add();

JFrame frame = new JFrame();
JButton button = new JButton("Corn");

[COLOR="Red"]frame.add(button);
[/COLOR]
// or...............
[COLOR="Red"]
frame.getContentPane().add(button);[/COLOR]

[Fubarable]

What is the difference between getContentPane().add() and just add();

Nothing. add() was added to JFrame as a convenience method. As the JFrame API states (always the first place to look):

As a conveniance add and its variants, remove and setLayout have been overridden to forward to the contentPane as necessary. This means you can write:

frame.add(child);

And the child will be added to the contentPane. The content pane will always be non-null.

[AcousticBruce]

Thanks gain :)

The API is the first place i looked and I know I read that very quote in the JFrame API. My issue is...

Nothing. add() was added to JFrame as a convenience method

makes more sense then

As a conveniance add and its variants, remove and setLayout have been overridden to forward to the contentPane as necessary. This means you can write:

frame.add(child);

And the child will be added to the contentPane. The content pane will always be non-null.

I guess i missed it :/ but now I see.

[JosAH]

Thanks gain :)

The API is the first place i looked and I know I read that very quote in the JFrame API. My issue is... [ ... ]

Well, it can be a bit tricky: the JFrame class doesn't implement an add( ... ) method at all. It leaves that to a superclass, the Container class. That method implements an add( ... ) method and calls a protected addImpl( ... ) method. That's the method that is overridden by the JFrame class and it 'delegates' (an OO-word) the same to its content pane. It doesn't clearly show from the API documentation on a first read.

kind regards,

Jos