public void combine(SimpleItem other)
    {
        for (Map.Entry<String, Integer> entry : other.labelMap.entrySet())
        {
            addLabel(entry.getKey(), entry.getValue());
        }
    }
public void combine ( SimpleItem other ) { for ( Map . Entry < String , Integer > entry : other . labelMap . entrySet ( ) ) { addLabel ( entry . getKey ( ) , entry . getValue ( ) ) ; } }
合并两个条目，两者的标签map会合并
@param other