SunClipboard.java 文件源码

public synchronized void removeFlavorListener(FlavorListener listener) {
    if (listener == null) {
        return;
    }
    Set<FlavorListener> flavorListeners = getFlavorListeners(AppContext.getAppContext());
    if (flavorListeners == null){
        //else we throw NullPointerException, but it is forbidden
        return;
    }
    if (flavorListeners.remove(listener) && --numberOfFlavorListeners == 0) {
        unregisterClipboardViewerChecked();
        currentFormats = null;
    }
}