JavaFX Alert Dialogs are the easiest way to communicate with the users in your application. Alert dialogs can be used to show login statuses such as login error and many more options.
Under this article, I will illustrate how to create JavaFX alert dialogs AKA standard dialogs. These dialogs are well known from the swing JOptionPane dialogs. If you are looking at how to create similar dialogs as JOptionPane in JavaFX, you are in the right place.
How to Create JavaFX Alert Dialogs
JavaFX Alert Dialogs library contains at least four types of alert dialogs:
- Information Dialogs
- Error Dialogs
- Warning Dialogs
- Exceptional Dialogs
1. Information Alert Dialogs
JavaFX Information dialogs are used to show important messages in the software. The following code illustrates how to create an information alert dialog in JavaFX
Alert alert = new Alert(Alert.AlertType.INFORMATION); alert.initStyle(StageStyle.UTILITY); alert.setTitle("success"); alert.setHeaderText(null); alert.setContentText("Infromatin Message"); alert.showAndWait();
2. JavaFX Error Alert Dialogs
An alert dialog in JavaFX is used to prohibit a user from taking a certain direction in the system, for example, it can be used to show login error in case of invalid login. The following code demonstrates how to create an error alert dialog in JavaFX.
Alert alert = new Alert(Alert.AlertType.ERROR); alert.initStyle(StageStyle.UTILITY); alert.setTitle("Error Message"); alert.setHeaderText(null); alert.setContentText("Error Message"); alert.showAndWait();
3. JavaFX Warning Alert Dialogs
JavaFX warning dialogs are used to tell users to be careful of certain actions in the system, proceed with the action but you should be warned. For example, when a user enters a certain character on a TextField, you can show a warning like, “Users are discouraged from using numbers in the username field”. A warning does not prevent a user from taking an action, it only makes users careful. The following code illustrates how to create a JavaFX warning dialog.
Alert alert = new Alert(Alert.AlertType.WARNING); alert.initStyle(StageStyle.UTILITY); alert.setTitle("Warning Message"); alert.setHeaderText(null); alert.setContentText("Warning Message"); alert.showAndWait();
That’s how to create alert dialogs in JavaFX
My name is Benson Karue, I was Software Engineer Telenet Co LTD before I quit and joined YouTube and Udemy as an instructor. I have real-world software experience and have a Bachelor’s degree in Mathematics and Computer Science with 6+ years of coding experience and winning several competitions and coding challenges.