docs: public void centerFrame() {
  		final Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
  		final Dimension frameSize = this.getSize();
  		if (frameSize.height > screenSize.height) {
  			frameSize.height = screenSize.height;
  		}
  		if (frameSize.width > screenSize.width) {
  			frameSize.width = screenSize.width;
  		}
  	    this.setLocation((screenSize.width - frameSize.width) / 2, (screenSize.height - frameSize.height) / 2);
  	}