如何在JavaFX场景生成器文本字段中获取用户输入？

TextField textField = new TextField();

String userInput = textField.getText();

textField.textProperty().addListener((observable, oldValue, newValue) -> {
    // 处理用户输入变化的逻辑
});

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

public class UserInputExample extends Application {

    @Override
    public void start(Stage primaryStage) {
        TextField textField = new TextField();

        Button button = new Button("获取用户输入");
        button.setOnAction(event -> {
            String userInput = textField.getText();
            System.out.println("用户输入：" + userInput);
        });

        VBox root = new VBox(10);
        root.getChildren().addAll(new Label("请输入内容："), textField, button);

        Scene scene = new Scene(root, 300, 200);
        primaryStage.setScene(scene);
        primaryStage.setTitle("获取用户输入示例");
        primaryStage.show();
    }

    public static void main(String[] args) {
        launch(args);
    }
}