テキスト

package fx01;
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.TextField;
import javafx.scene.control.Tooltip;
import javafx.scene.layout.HBox;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;


public class pro extends Application {

    @Override
    public void start(Stage primaryStage) {
        final TextField tf = new TextField();
        tf.setPrefColumnCount(15);
        tf.setTooltip(new Tooltip("文字を入力して下さい"));

        Button btn = new Button();
        btn.setText("確定");
        btn.setDefaultButton(true);
        btn.setOnAction(new EventHandler() {
            @Override
            public void handle(ActionEvent event) {
                if (tf.getText() != null && !tf.getText().isEmpty()) {
                    System.out.println(tf.getText());
                }
            }
        });

        HBox hb = new HBox();
        hb.getChildren().addAll(tf, btn);
        hb.setSpacing(2);

        StackPane root = new StackPane();
        root.getChildren().add(hb);

        Scene scene = new Scene(root);

        primaryStage.setTitle("Sample_TextField");
        primaryStage.setScene(scene);
        primaryStage.show();
    }

    /**
     * The main() method is ignored in correctly deployed JavaFX application.
     * main() serves only as fallback in case the application can not be
     * launched through deployment artifacts, e.g., in IDEs with limited FX
     * support. NetBeans ignores main().
     *
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        launch(args);
    }
}