HashMap元素的双向数据绑定

import javafx.beans.property.MapProperty;
import javafx.beans.property.SimpleMapProperty;
import javafx.collections.FXCollections;
import javafx.collections.ObservableMap;

public class HashMapBindingExample {
    public static void main(String[] args) {
        ObservableMap<String, String> hashMap = FXCollections.observableHashMap();
        MapProperty<String, String> mapProperty = new SimpleMapProperty<>(hashMap);

        // 绑定HashMap的键和值与JavaFX的属性
        hashMap.put("key1", "value1");
        mapProperty.get().addListener((MapChangeListener.Change<? extends String, ? extends String> change) -> {
            System.out.println("HashMap changed: " + change.getKey() + " = " + change.getValueAdded());
        });

        // 修改HashMap的值
        mapProperty.get().put("key1", "new value");

        // 输出结果：HashMap changed: key1 = new value
    }
}