import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.TextArea;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;

public class TextAreaSample extends Application {

    @Override
    public void start(Stage primaryStage) {
        TextArea textArea = new TextArea();
	textArea.setText("你好，世界");

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

        Scene scene = new Scene(root, 300, 200);
        primaryStage.setTitle("Test");
        primaryStage.setScene(scene);

        primaryStage.show();
    }

    public static void main(String[] args) {
        launch(TextAreaSample.class, args);
    }
}