!7

lib 1400521 // FlatLAF

p {
  com.formdev.flatlaf.FlatLightLaf.setup();
  
  var screens = GraphicsEnvironment.getLocalGraphicsEnvironment().getScreenDevices();
  System.out.println("Detected " + screens.length + " screen(s)");
  for (int iScreen = 0; iScreen < screens.length; iScreen++) {
    var screen = screens[iScreen].getDefaultConfiguration().getBounds();
    
    // place window in center of screen
    new JWindow window;
    window.setBounds(
      screen.x+screen.width/4,
      screen.y+screen.height/4,
      screen.width/2,
      screen.height/2);
      
    // faint (mostly translucent) blue background
    window.setBackground(new Color(0, 0, 255, 64));
    
    window.setAlwaysOnTop(true);
    var label = new JLabel("Screen " + (iScreen+1) + " of " + screens.length);
    label.setHorizontalAlignment(JLabel.CENTER);
    window.add(label);
    window.setVisible(true);
  }
    
  System.out.println("Will exit in 10");
  Thread.sleep(10000);
  System.exit(0);
}

Began life as a copy of #1034002