ObservableMapValues.java 文件源码

public ObservableMapValues(ObservableList<T> internalStore, ObservableMap<?, T> referencedMap) {
    this.internalStore = internalStore;
    this.referencedMap = referencedMap;

    referencedMap.addListener((MapChangeListener<Object, T>) change -> {
        if (change.wasAdded()) {
            internalStore.add(change.getValueAdded());
        }
        if (change.wasRemoved()) {
            internalStore.remove(change.getValueRemoved());
        }
    });
}