posted 21 years ago
Hello, everybody,
I find that several classes in the java.util pacakage implements same interface several times. For example,
LinkedList extends AbstractSequentialList implements List, Cloneable, Serializable
AbstractSequentialList extends AbstractList
AbstractList extends AbstractCollection implements List
So, LinkedList implements List twice, one directly, one indirectly.
Can anybody give me an explanation?
Thanks,
Nanchun