Few Components

package sample;

import javafx.application.Application;
import javafx.collections.FXCollections;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.HBox;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

public class Main extends Application {

    @Override
    public void start(Stage primaryStage) throws Exception{
        //here you can set the title of your stage
        primaryStage.setTitle("Komponentensalat");

        //We chose a BorderPane as our primary layout.
        BorderPane borderPane = new BorderPane();


        //Here we just created a label with text to indicate the top part of the BorderPane.
        Label labelNorth = new Label("This is a label at the top of the BorderPane\n ");


        //An example of how to place a group of RadioButtons in a vertical layout.
        Label labelWest = new Label("This is a group of RadioButtons\npositioned by a VBox with spacing 10   ");
        //The ToggleGroup is necessary to ensure that only one RadioButton can be selected at any time.
        ToggleGroup group = new ToggleGroup();
        RadioButton rb1 = new RadioButton("Choice A");
        RadioButton rb2 = new RadioButton("Choice B");
        RadioButton rb3 = new RadioButton("Choice C");
        rb1.setToggleGroup(group);
        rb2.setToggleGroup(group);
        rb3.setToggleGroup(group);
        //VBox lets us position (GUI) components vertically. The (10) indicates the spacing between components.
        VBox vboxLeft = new VBox(10);
        //multiple components can be added to the VBox using addAll(...)
        vboxLeft.getChildren().addAll(labelWest,rb1,rb2,rb3);


        //An example of how a ChoiceBox can be used.
        //Note that the \n indicates a line break in a String.
        Label labelEast = new Label("Here is a Choice Box with languages.\nThe text underneath changes\ndepening on your language choice");
        //For the Spanish n with a ~ above, you have to place \u00F1 inside your string
        final String[] greetingsLanguage = {"Hello in English","Hallo auf deutsch","Hola en espa\u00F1ol"};
        Label greetings = new Label();
        ChoiceBox choiceBox = new ChoiceBox(FXCollections.observableArrayList("English", "Deutsch", "Espa\u00F1ol"));
        //Please note that in more complex scenarios it is usually a good idea to separate the view from the functions.
        //In this case you should register the controller (in the MVC pattern) as a listener to the ChoiceBox.
        //This is a lambda expression
        choiceBox.getSelectionModel().selectedIndexProperty().addListener((ov,value,newValue)->{greetings.setText(greetingsLanguage[newValue.intValue()]);});
        choiceBox.getSelectionModel().select(0);
        VBox vboxRight = new VBox(10);
        vboxRight.getChildren().addAll(labelEast,choiceBox,greetings);


        //This is an example of how images can be added to your JavaFX application.
        Label labelCenter = new Label("Here is a way to include images\nin your JavaFX Application");
        //Place your images in the resources package so that it can be loaded as follows.
        //It is also possible to specify a URL path here.
        Image img = new Image(getClass().getResource("/resources/javafx.png").toURI().toString());
        //add the image to your ImageView, where you can set the size etc.
        ImageView imView = new ImageView(img);
        imView.setFitHeight(150);
        imView.setFitWidth(300);
        VBox vboxCenter = new VBox(10);
        vboxCenter.getChildren().addAll(labelCenter,imView);


        //This is an example of a TextField, in which you can write something, and a Button. When clicking on the button
        //some action should be performed, in this case update the label to greet the user.
        Label labelSouth = new Label("Here you can enter your name into a TextField and press the OK Button");
        Label nameLabel = new Label();
        Label lName = new Label("Please enter your name: ");
        TextField tf = new TextField();
        Button button = new Button("OK");
        //Please note that also in this case it is good practise to implement functionality in the controller in more
        //complex examples.
        button.setOnAction(e->nameLabel.setText("Hello "+tf.getText()));
        HBox hbox = new HBox(15,lName,tf,button);
        VBox vboxBottom = new VBox(10,labelSouth,hbox,nameLabel);

        //with setTop etc you can add components to the BorderPane.
        borderPane.setTop(labelNorth);
        borderPane.setAlignment(labelNorth, Pos.CENTER);
        borderPane.setLeft(vboxLeft);
        borderPane.setBottom(vboxBottom);
        borderPane.setRight(vboxRight);
        borderPane.setCenter(vboxCenter);

        //Don't forget to add the borderPane to the scene, else you will not be able to see it.
        //Here you can also specify the size of the scene.
        primaryStage.setScene(new Scene(borderPane, 800, 300));
        //without stage.show() the stage will be invisible.
        primaryStage.show();
    }

}