如何修复JavaFX中值发生变化的错误？

import javafx.beans.binding.Bindings;
import javafx.beans.property.SimpleStringProperty;
import javafx.beans.property.StringProperty;
import javafx.scene.control.Label;

public class DataModel {
    private final StringProperty text = new SimpleStringProperty();

    public String getText() {
        return text.get();
    }

    public void setText(String text) {
        this.text.set(text);
    }

    public StringProperty textProperty() {
        return text;
    }
}

// 在你的控制器或主类中
Label label = new Label();
DataModel model = new DataModel();

// 绑定Label的text属性到model的text属性
label.textProperty().bind(model.textProperty());

model.textProperty().addListener((observable, oldValue, newValue) -> {
    // 处理值的变化
    System.out.println("Old value: " + oldValue + ", New value: " + newValue);
});

import javafx.beans.binding.Bindings;

// 假设你有两个属性
StringProperty firstName = new SimpleStringProperty();
StringProperty lastName = new SimpleStringProperty();

// 创建一个全名的绑定
StringProperty fullName = Bindings.concat(firstName, " ", lastName);