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javaswinglayout-managerboxlayout

Using BoxLayout without container target?

I'm trying to use BoxLayout instead of my GridLayout code:

setLayout (new GridLayout (5, 2));

except I noticed that when you do BoxLayout you need to do something like: 

setLayout (new BoxLayout(container, BoxLayout.Y_AXIS));

However, I don't call the JFrame something, like how it would be called:

JFrame label = new JFrame ();

it basically just works in the constructor.. I'm obviously a beginner in Java but do have some understanding. Because I don't call the JFrame and simply write:

add (controlPanel);
add (outputPanel);

What do I put into the target part of the BoxLayout? I do want it to be on the Y axis but I'm not sure what to put in the field before it instead of the "container" thanks :)

Solution

  • Simply use JFrame's content pane as target.

    setLayout(new BoxLayout(getContentPane(), BoxLayout.Y_AXIS));