Java SE (Java Platform, Standard Edition)

Double clicks are being captured as single click :(

In fxml file:

<Button fx:id="A_button" onMouseClicked="#buttonAClicked"> 

In the controller

private void buttonAClicked(MouseEvent mouseEvent) { 
    if (mouseEvent.getButton().equals(MouseButton.PRIMARY)) { 
        if (mouseEvent.getClickCount() == 2) { 
            System.out.println("Double clicked A_button"); 
        } 
        if (mouseEvent.getClickCount() == 1) { 
            System.out.println("Single clicked A_button"); 
        } 
    } 
} 

Unfortunately I am finding that double click is not being caught - only single clicks. In the debugger, click count is 1.