Minimize window and allow FXTrayIcon to exist in system tray

App.java

package test;

import com.dustinredmond.fxtrayicon.FXTrayIcon;
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.GridPane;
import javafx.stage.Stage;

public class App extends Application {

    @Override
    public void start(Stage stage) throws Exception {
        FXTrayIcon icon = new FXTrayIcon(stage, getClass().getResource("image.png"));
        icon.show();
        
        GridPane grid = new GridPane();

        Button button = new Button("Minimize Icon");
        button.setOnAction(e -> stage.hide());
        stage.setScene(new Scene(grid));
        stage.show();
    }

    public static void main(String[] args) {
        Application.launch(App.class, args);
    }
}