How do I center a JDialog on screen?

Question

How do I go about positioning a JDialog at the center of the screen?

Answer 1

In Java 1.4+ you can do:

final JDialog d = new JDialog(); d.setSize(200,200); d.setLocationRelativeTo(null); d.setVisible(true); 

Or perhaps (pre 1.4):

final JDialog d = new JDialog(); d.setSize(200, 200); final Toolkit toolkit = Toolkit.getDefaultToolkit(); final Dimension screenSize = toolkit.getScreenSize(); final int x = (screenSize.width - d.getWidth()) / 2; final int y = (screenSize.height - d.getHeight()) / 2; d.setLocation(x, y); d.setVisible(true);