A DESCRIPTION OF THE PROBLEM :
If maximize property is set to true for an undecorated Stage, the following behaviour is observed on different platforms:

  * Windows: Undecorated stage is maximized
  * MacOS: Undecorated stage is not maximized
  * Linux(Ubuntu): Undecorated stage is not maximized

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Run the sample on different operating systems



EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The stage should be maximized on all platform or should not maximize on any platform

ACTUAL -
The stage is maximized on Windows but doesn't maximize on Linux or Mac OS

---------- BEGIN SOURCE ----------
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
import javafx.stage.StageStyle;

public class MaximizedStage extends Application {
    public void start (Stage stage) {
        StackPane sp = new StackPane(new Label("Hello"));
        stage.setScene(new Scene (sp, 500, 500));
        stage.initStyle(StageStyle.UNDECORATED);
        stage.show();
        stage.setMaximized(true);
    }
}
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Current workaround is to find the dimensions of the screen on which to the stage is to be shown and update the width and height of the Stage.

stage.initStyle(StageStyle.UNDECORATED);
stage.setWidth(Screen.getPrimary().getBounds().getWidth());
stage.setHeight(Screen.getPrimary().getBounds().getHeight());
stage.show();

FREQUENCY : always