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
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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.
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Warning – This type of alert is used to show a warning alert to inform the user about some fact of action.
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None – This is a type of alert that has the effect of not setting any default properties in the Alert.
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Information – This type of alert is used to show a piece of information.
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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
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
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
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
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
