Main.java Source code

Introduction

Here is the source code for Main.java

Source

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();
    }
}