Put a JButton in the center of the screen with BorderLayout

问题

How to add a JButton into the center of a JFrame with BorderLayout()? I tried using BorderLayout.CENTER, but instead of the center of the screen, it gave the top-center of the screen. Or do I have to use another layout manager?

回答1:

Put a JPanel in the CENTER and set the layout to GridBagLayout or BoxLayout as seen in this answer to Set component at center of the page.

The GridBagLayout is used to center a label containing the yellow/red gradient image seen in the Nested Layout Example.

回答2:

It may take some time to learn, but SpringLayout is worth looking into. It will let you position elements on the GUI where you wish. You can look here for examples of different layouts.

回答3:

try this

frame.getContentPane().setLayout(new BorderLayout(0, 0));

JButton btnNewButton = new JButton("New button");
frame.getContentPane().add(btnNewButton, BorderLayout.CENTER);

来源：https://stackoverflow.com/questions/16727564/put-a-jbutton-in-the-center-of-the-screen-with-borderlayout