import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.TextField;
import javafx.scene.paint.Color;
import javafx.stage.Stage;
public class Main extends Application {
public static void main(String[] args) {
Application.launch(args);
}
@Override
public void start(Stage primaryStage) {
primaryStage.setTitle("");
Group root = new Group();
Scene scene = new Scene(root, 300, 250, Color.WHITE);
TextField field = new TextField() {
@Override public void replaceText(int start, int end, String text) {
if (!text.matches("[a-z]")) {
super.replaceText(start, end, text);
}
}
@Override public void replaceSelection(String text) {
if (!text.matches("[a-z]")) {
super.replaceSelection(text);
}
}
};
root.getChildren().add(field);
primaryStage.setScene(scene);
primaryStage.show();
}
}
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