I am using a swing JPanel, with the standard flow layout. I have 3 components in the panel; JLabel, JTextField and JButton.
I want to have it so I have the JLabel on its own line, then the JTextField and JButton next to each other on the next line.

A BorderLayout does not work because it seems you cant have two components in the same (CENTER) area.
A box layout does not work because it puts all 3 on a separate lines.

Is a GridBagLayout the only way to achieve this?

cheers!

see other answer

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This is how I'd do it, but it may not be the ideal way -- I have a background in postscript and html coding, so i tend to build things up using tables (in this case i'm going to use a box to accomplish the same thing) as a way of formatting. I find this to be pretty flexible:

...
...
Box hbLine1 = Box.createHorizontalBox();
Box hbLine2 = Box.createHorizontalBox();
Box vBox = Box.createVerticalBox();

hbLine1.add(new JLabel("blah"));
hbLine2.add(new JTextField());
hbLine2.add(new JButton("Click Me"));

vBox.add(hbLine1);
vBox.add(hbLine2);
...
...

 Now your vBox contains the configuration of controls in the way you want it ... just by adding your vBox, regardless of layout, the components will be placed like you describe, so you can use whatever layout makes since for you -- for example you could add the vBox to the CENTER of the BorderLayout

Hope That Helps

Regards,
Meredith Shaebanyan