使用全屏和GridBagConstrains固定jButton的大小

Question

I am trying to have my jButton really small. It works if I change the margins (the 250 in the example). But this will not work with variable screen size. Any other method?

startButton = new JButton("Start");
//this is not taking:
startButton.setPreferredSize(new Dimension(50, 40));

contentPanel.add(startButton, new GridBagConstraints(0, 1, 1, 1, 1, 0, GridBagConstraints.NORTHWEST,
                GridBagConstraints.HORIZONTAL, new Insets(150, 250, 0, 250), 0, 0));

As far as I understand the 250 are left and right margin. Of course by changing these the size changes. But since it's full screen this is not a robust way to do it. Any ideas on how to make the button minimal size and then just center it?

Answer 1

I was able to resize the button with:

 contentPanel.add(buttonsPanel, new GridBagConstraints(0, 1, 1, 1, 1, 0, GridBagConstraints.PAGE_START,
                GridBagConstraints.HORIZONTAL, new Insets(100, 100, 0, 100), 0, 0));

startButton.setPreferredSize(new Dimension(100, 40));