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How can I generate a new event to handle whenever TextField's text is changed?
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We create a text field by creating an instance of the TextField class. We then retrieve the value using the object name followed by a dot and the getText() method. In the code below, we create a single text field named text. We then retrieve the value through the line, text.
In this article, we show how to add prompt text to a text field in JavaFX. A prompt text is text that appears in a text field when it is first load but that disappears when a user starts typing into the text field.
To set the prompt text for a TextField use the setPromptText method: txtFld.
Or Use ChangeListener interface.
textField.textProperty().addListener(new ChangeListener<String>() {
@Override
public void changed(ObservableValue<? extends String> observable,
String oldValue, String newValue) {
System.out.println(" Text Changed to " + newValue + ")\n");
}
});
Register a listener with the TextFields textProperty:
textField.textProperty().addListener((obs, oldText, newText) -> {
System.out.println("Text changed from "+oldText+" to "+newText);
// ...
});
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