Thread: Is there a layout for this?

I am trying to put several components into a Panel with a BoxLayout set to BoxLayout.Y_AXIS, however, I am also attempting to get them to expand horizontally to fit the width. Essentially I want the same behavior as can be seen with border layout, except with out the limit of only having NORTH, CENTER, SOUTH Positions.

JFrame frame = new JFrame("Test");
JPanel panel = new JPanel();
panel.setLayout( new BoxLayout( panel, BoxLayout.Y_AXIS ));
panel.add( new JButton("Button One"));
panel.add( new JButton("Button Two"));
frame.add( panel );
frame.setSize( 300, 100 );
frame.setVisible(true);

This shows me two small buttons each against the left side, What I expect and want is two buttons one on top of the other each 300px wide, and I expect that if I resize the frame they would grow or shrink horizontally to fill the window. Is this possible? I have googled through all the Java Docs, and the Trail pages to no avail. Any suggestions would be appreciated...