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import java.util.*; |
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/** |
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* An unbounded {@linkplain BlockingQueue blocking queue} based on a |
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* {@link PriorityQueue}, obeying its ordering rules and |
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* implementation characteristics. While this queue is logically |
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* An unbounded {@linkplain BlockingQueue blocking queue} that uses |
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* the same ordering rules as class {@link PriorityQueue} and supplies |
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* blocking retrieval operations. While this queue is logically |
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* unbounded, attempted additions may fail due to resource exhaustion |
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* (causing <tt>OutOfMemoryError</tt>). A priority queue does not |
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* permit <tt>null</tt> elements. A priority queue relying on natural |
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* (causing <tt>OutOfMemoryError</tt>). This class does not permit |
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* <tt>null</tt> elements. A priority queue relying on natural |
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* ordering also does not permit insertion of non-comparable objects |
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* (doing so results in <tt>ClassCastException</tt>). |
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* |
