How to free the memory after closing JavaFX Stage?

Question

I am creating a JavaFx application which contain a button. When I click on that button, it opens a new stage containing a table with thousands of data. It's working fine. But the problem is, when I close the Stage of that table, memory is not getting free by the application i.e. everytime when I open the new stage for table then memory is get increased. Is there any issue with JavaFX? or I have to do something else?
I have tried to set everything null at the time of closing of that stage but still memory is not getting free.
My button click code is :
btn.setOnAction(new EventHandler<ActionEvent>() {
            @Override
            public void handle(ActionEvent event) {
                Stage stage = new Stage();
                Table1Controller controller = (Table1Controller) Utility.replaceScene("/tablesample/Table1.fxml", stage);
                controller.init(stage);
                stage.setTitle("Sample");
                stage.setWidth(583.0);
                stage.setHeight(485.0);
                stage.initModality(Modality.APPLICATION_MODAL);
                InputStream in = TableSample.class.getResourceAsStream("icon_small.png");
                try {
                    stage.getIcons().add(new Image(in));
                } finally {
                    try {
                        in.close();
                    } catch (IOException ex) {
                stage.show();
Utility.replacescene method : It loads the scene from given fxml and set to stage. At final It return controller object for that scene.
public static Initializable replaceScene(String fXml, Stage mystage) {
        InputStream in = null;
        try {
            FXMLLoader loader = new FXMLLoader();
            in = Utility.class.getResourceAsStream(fXml);
            loader.setLocation(Utility.class.getResource(fXml));
            loader.setBuilderFactory(new JavaFXBuilderFactory());
            AnchorPane page;
            try {
                page = (AnchorPane) loader.load(in);
            } finally {
                in.close();
            Scene scene = new Scene(page);
            mystage.setScene(scene);
            return loader.getController();
        } catch (Exception ex) {
            return null;
    }Thanks

Answer 1

Is there any issue with JavaFX? or I have to do something else?It's likely an issue with your application code (though it could be a bug in the JavaFX platform too).
Either way debugging most memory issues in JavaFX (except for ones the graphics card texture related) is the same as debugging them in Java - so just use standard Java profiling tools to try to track down any memory leaks you have.
Such work is as much an art as a science and takes some experience to get right, so grab your detective cap, download and use the tools linked and try and track it down:
http://stackoverflow.com/questions/6470651/creating-a-memory-leak-with-java
http://resources.ej-technologies.com/jprofiler/help/doc/indexRedirect.html?http&&&resources.ej-technologies.com/jprofiler/help/doc/helptopics/memory/memoryLeak.html
http://www.ej-technologies.com/products/jprofiler/overview.html (recommended tool).
http://visualvm.java.net/
http://netbeans.org/kb/articles/nb-profiler-uncoveringleaks_pt1.html
http://www.ibm.com/developerworks/library/j-leaks/ (this link is really old and somewhat outdated but explains some of the underlying concepts better than some newer articles I found).