import java.util.*;
import java.util.zip.*;
import java.util.List;
import java.util.regex.*;
import java.util.concurrent.*;
import java.util.concurrent.atomic.*;
import java.util.concurrent.locks.*;
import java.util.function.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.text.*;
import javax.swing.table.*;
import java.io.*;
import java.net.*;
import java.lang.reflect.*;
import java.lang.ref.*;
import java.lang.management.*;
import java.security.*;
import java.security.spec.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import java.awt.geom.*;
import javax.imageio.*;
import java.math.*;


class main {

public static void main(final String[] args) throws Exception {
  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
    JWindow window = new JWindow();
    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);
}}