下面是父类DblyLinkListpackageJavaCollections.list;importjava.util.Iterator;importjava.util.NoSuchElementException;publicclassDblyLinkListimplementsIterable{classDListNode{privateTitem;privateDListNodeprev;privateDListNodenext;DListNode(Titem,DListNodep,DListNoden){this.item=item;this.prev=p;this.next