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Queue Question? AbstractQueue

 
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You want to create your own custom queue class. You don't want or need null elements in this queue. Which class or interface will your class inherit from ? Choose the preferred class header.


class CustomQueue<E> implements Queue
class CustomQueue<E> extends AbstractQueue
class CustomQueue<E> extends Queue
class CustomQueue<E> implements AbstractQueue



Help me to understand the question!!!




Thanks,
cmbhatt
 
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