你如何处理java中只有单一继承的问题？这是我的具体问题:我有三个(简化的)类:publicabstractclassAbstractWord{Stringkind;//egnoun,verb,etcpublicStringgetKind(){returnkind;}}publicclassWordextendsAbstractWord{publicfinalStringword;ctor...publicvoidsetKind(){//basedonthevariablewordcalculatekind..}}publicclassWordDescriptorextendsAbst