Keskustelu: Koodit: Java: JavaFX: Lyhenne

package javafx_lyhenne;

import javafx.application.Application;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javafx.scene.text.Text;
import javafx.stage.Stage;

public class JavaFX_Lyhenne extends Application {
    String ent = "";
    @Override
    public void start(Stage stage){

        stage.setTitle("Ohjelma");
        Group root = new Group();
        Scene scene = new Scene(root,400,400);
        TextField teksti = new TextField("2");
        Text tulos = new Text(100,100,"0");
        root.getChildren().add(teksti);
        root.getChildren().add(tulos);
        teksti.textProperty().addListener(new ChangeListener<String>() {

            @Override
            public void changed(ObservableValue<? extends String> observable, String oldValue, String newValue) {

                if (newValue.length() >= 3){
                    tulos.setText(newValue.substring(0,3));
                }
            }
        });

        stage.setScene(scene);
        stage.show();
    }
    public static void main(String[] args) {
        Application.launch(args);
    }

}