public static void openFrame(Object frame) { boolean packFrame = false; if (packFrame) { ((JFrame) frame).pack(); } else { ((JFrame) frame).validate(); } // Center the window Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize(); Dimension frameSize = ((JFrame) frame).getSize(); if (frameSize.height > screenSize.height) { frameSize.height = screenSize.height; } if (frameSize.width > screenSize.width) { frameSize.width = screenSize.width; } ((JFrame) frame) .setLocation( (screenSize.width - frameSize.width) / 2, (screenSize.height - frameSize.height) / 2); ((JFrame) frame).setVisible(true); }