Java 8 Update 40 has added many new JavaFX UI controls including alert dialog. Before Java 8 Update 40 released, I used ControlsFX to show Dialogs in JavaFX. In ControlsFX, there is a Exception Dialog that can display exception's messages, but in Java 8 official dialogs, there is not any Exception Dialog. So, I want to make a Exception Dialog by myself with Java official dialogs.

I found code below:

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Alert alert = new Alert(AlertType.ERROR);
alert.setTitle("Exception Dialog");
alert.setHeaderText("Look, an Exception Dialog");
alert.setContentText("Could not find file blabla.txt!");

Exception ex = new FileNotFoundException("Could not find file blabla.txt");

// Create expandable Exception.
StringWriter sw = new StringWriter();
PrintWriter pw = new PrintWriter(sw);
ex.printStackTrace(pw);
String exceptionText = sw.toString();

Label label = new Label("The exception stacktrace was:");

TextArea textArea = new TextArea(exceptionText);
textArea.setEditable(false);
textArea.setWrapText(true);

textArea.setMaxWidth(Double.MAX_VALUE);
textArea.setMaxHeight(Double.MAX_VALUE);
GridPane.setVgrow(textArea, Priority.ALWAYS);
GridPane.setHgrow(textArea, Priority.ALWAYS);

GridPane expContent = new GridPane();
expContent.setMaxWidth(Double.MAX_VALUE);
expContent.add(label, 0, 0);
expContent.add(textArea, 0, 1);

// Set expandable Exception into the dialog pane.
alert.getDialogPane().setExpandableContent(expContent);
alert.showAndWait();

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When the code was run, a dialog showed:

http://i.imgur.com/Zf0U09p.png

And then click the expand button, it should be showed as below:

http://i.imgur.com/PdED0Q2.png

But in fact, it was:

http://i.imgur.com/uJEN3jK.png

This dialog has troubles in redraw and resize.

My OS is Linux Mint 17.1 64bits with MATE Desktop.

Microsoft Windows may not have this problem(I heard from Windows user), maybe this is a platform specific problem.