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import javafx.application.Application;

import javafx.geometry.Insets;

import javafx.scene.Scene;

import javafx.scene.control.Button;

import javafx.scene.control.ComboBox;

import javafx.scene.layout.VBox;

import javafx.stage.Stage;

public class Main extends Application {

Stage window;

Scene scene;

Button button;

ComboBox<String> comboBox;

public static void main(String[] args) {

launch(args);

}

@Override

public void start(Stage primaryStage) throws Exception {

window = primaryStage;

window.setTitle("ComboBox Demo");

button = new Button("Submit");

comboBox = new ComboBox<>();

comboBox.getItems().addAll(

"Good Will Hunting",

"St. Vincent",

"Blackhat"

);

comboBox.setPromptText("What is your favorite movie?");

button.setOnAction(e -> printMovie());

//ComboBoxes also generate actions if you need to get value instantly

comboBox.setOnAction( e -> System.out.println("User selected " + comboBox.getValue()) );

VBox layout = new VBox(10);

layout.setPadding(new Insets(20, 20, 20, 20));

layout.getChildren().addAll(comboBox, button);

scene = new Scene(layout, 300, 250);

window.setScene(scene);

window.show();

}

private void printMovie(){

System.out.println(comboBox.getValue());

}

}