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JavaFX Alert Dialogs | 100% best for beginners

May 1, 2021 - Updated on September 23, 2022
in Java
Reading Time: 3 mins read
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alert dialog in javafx
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Contents

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  • JavaFX Alert Dialogs Tutorial
  • Types of Alert dialogs in JavaFX
  • Source code to show alert dialog in JavaFX
    • Confirmation Alert
    • Output
    • Warning Alert
    • Output
    • None Alert type
    • Output
    • Information Alert
    • Output
    • Error Alert
    • Output
  • YouTube Video

JavaFX Alert Dialogs Tutorial

In this blog tutorial, you will learn to use the JavaFX alert dialogs. Alert is a subclass of the Dialog class. JavaFX alert dialog is used to show some information to the user. 

Types of Alert dialogs in JavaFX

  • Confirmation – This type of alert is used to confirm from the user in a way that suggests the content of the dialog is seeking confirmation from the user. This includes confirmation of both the Ok and Cancel buttons.

  • Warning – This type of alert is used to show a warning alert to inform the user about some fact of action.

  • None – This is a type of alert that has the effect of not setting any default properties in the Alert.

  • Information – This type of alert is used to show a piece of information.

  • Error – This type of alert is used to show a piece of information that has gone wrong.

Source code to show alert dialog in JavaFX

Confirmation Alert

Alert alert = new Alert(Alert.AlertType.CONFIRMATION);
alert.setTitle("Confirmation alert Dialog");
alert.setContentText("Please confirm");
alert.setHeaderText("Confirmation");
alert.showAndWait();

Output

JavaFX alert dialog confirmation
 

Warning Alert

Alert alert = new Alert(Alert.AlertType.WARNING);
alert.setTitle("Warning Dialog");
alert.setContentText("This is a warning alert!");
alert.setHeaderText("Warning alert");
alert.showAndWait();

Output

Alert Dialog in JavaFX Warning

None Alert type

Alert alert = new Alert(Alert.AlertType.NONE);
alert.setTitle("None Alert type");
alert.setContentText("This is a none type alert!");
alert.setHeaderText(null);
alert.getDialogPane().getButtonTypes().add(ButtonType.CLOSE);
alert.showAndWait();

Output

Alert Dialog in JavaFX Warning None type

 

Information Alert

Alert alert = new Alert(Alert.AlertType.INFORMATION);
alert.setTitle("Information Dialog");
alert.setContentText("This is an information alert!");
alert.setHeaderText("Information alert");
alert.showAndWait();

Output

Alert Dialog in JavaFX Information

 

Error Alert

Alert alert = new Alert(Alert.AlertType.ERROR);
alert.setTitle("Error Dialog");
alert.setContentText("This is an error alert!");
alert.setHeaderText("Error alert");
alert.showAndWait();

Output

Alert Dialog in JavaFX Error

 

YouTube Video

YouTube video
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