import javafx.application.Application;
import javafx.event.EventHandler;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.input.MouseEvent;
import javafx.scene.paint.Color;
import javafx.scene.shape.Rectangle;
import javafx.stage.Stage;
import javafx.stage.StageStyle;
import javafx.beans.value.*;

public class test extends Application {
    public void start(final Stage stage) {
        stage.initStyle(StageStyle.TRANSPARENT);
        Group g = new Group();
        Scene scene1 = new Scene(g);
        scene1.setFill(Color.GREEN);
        stage.setTitle("stage1");
        stage.setWidth(250);
        stage.setHeight(100);
        stage.setX(50);
        stage.setY(70);
        stage.setScene(scene1);

        Rectangle r = new Rectangle(10, 10, 50, 50);
        r.setFill(Color.RED);

        r.setOnMouseClicked(new EventHandler<MouseEvent>() {
            public void handle(MouseEvent t) {
                System.err.println("press");
                stage.setIconified(true);
            }
        });
        g.getChildren().add(r);

        stage.iconifiedProperty().addListener(new ChangeListener<Boolean>() { 
            @Override 
            public void changed(ObservableValue<? extends Boolean> arg0, 
                Boolean arg1, Boolean arg2) {
                System.out.println("----------------------------------"); 
                System.out.println("arg0 =" + arg0); 
                System.out.println("arg1 =" + arg1); 
                System.out.println("arg2 =" + arg2); 
            } 
        });
        stage.show();
    }

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