Test for com.badlogic.gdx.backends.lwjgl3.Lwjgl3Window lifecycle

WindowTest.java

package gdx;

import com.badlogic.gdx.ApplicationAdapter;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.backends.lwjgl3.*;

import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;

public class WindowTest {
    public static void main(String[] args) {
        System.out.println("starting window test...");
        ScheduledExecutorService service = Executors.newScheduledThreadPool(1);
        new Lwjgl3Application(new ApplicationAdapter() {
            public Lwjgl3WindowConfiguration config() {
                Lwjgl3WindowConfiguration configuration = new Lwjgl3WindowConfiguration();
                configuration.setWindowPosition(100, 100);
                configuration.setWindowedMode(100, 100);
                configuration.setWindowListener(new Lwjgl3WindowListener() {
                    Boolean created = false;

                    public void iconified() {
                        System.out.println("window iconified");
                    }

                    public void deiconified() {
                        if (created) System.out.println("window de-iconified");
                        else {
                            created = true;
                            System.out.println("window de-iconified (on create)");
                        }
                    }

                    public void focusLost() {
                        System.out.println("window lost focus");
                    }

                    public void focusGained() {
                        System.out.println("window gained focus");
                    }

                    public boolean windowIsClosing() {
                        System.out.println("window is closing");
                        return true;
                    }
                });
                return configuration;
            }

            public void minimize(Lwjgl3Window window) {
                System.out.println("trying to minimize window");
                window.iconifyWindow();
            }

            public void restore(Lwjgl3Window window) {
                System.out.println("trying to restore window");
                window.deiconifyWindow();
            }

            public void create() {
                Lwjgl3Application app = (Lwjgl3Application) Gdx.app;
                Lwjgl3Window window = app.newWindow(new ApplicationAdapter() {
                }, config());
                service.schedule(() -> window.postRunnable(() -> minimize(window)), 2, TimeUnit.SECONDS);
                service.schedule(() -> window.postRunnable(() -> restore(window)), 4, TimeUnit.SECONDS);
                service.schedule(app::exit, 6, TimeUnit.SECONDS);
            }
        }, new Lwjgl3ApplicationConfiguration());
        System.out.println("window test completed");
        service.shutdown();
    }
}