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/* |
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* Written by Doug Lea with assistance from members of JCP JSR-166 |
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* Expert Group and released to the public domain. Use, modify, and |
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* redistribute this code in any way without acknowledgement. |
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* Expert Group and released to the public domain, as explained at |
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* http://creativecommons.org/licenses/publicdomain |
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*/ |
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package java.util; |
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/** |
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* A collection designed for holding elements prior to processing. |
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* Besides basic {@link java.util.Collection Collection} operations, queues provide |
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* additional insertion, extraction, and inspection operations. |
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* additional insertion, extraction, and inspection operations. The names |
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* of the operations vary with their policies: |
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* |
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*<table BORDER CELLPADDING=3 CELLSPACING=1> |
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* <tr> |
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* <td><em>Operation</em></td> |
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* <td ALIGN=CENTER><em>Attempt</em></td> |
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* <td ALIGN=CENTER><em>Throw</em></td> |
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* </tr> |
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* <tr> |
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* <td><em>insert</em></td> |
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* <td>offer(x)</td> |
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* <td>add(x)</td> |
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* </tr> |
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* <tr> |
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* <td><em>extract</em></td> |
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* <td>poll()</td> |
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* <td>remove()</td> |
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* </tr> |
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* <tr> |
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* <td><em>inspect</em></td> |
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* <td>peek()</td> |
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* <td>element()</td> |
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* </tr> |
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*</table> |
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* |
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* <p>Queues typically, but do not necessarily, order elements in a |
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* FIFO (first-in-first-out) manner. Among the exceptions are |
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* @see java.util.concurrent.PriorityBlockingQueue |
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* @since 1.5 |
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* @author Doug Lea |
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* @param <E> the type of elements held in this collection |
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*/ |
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public interface Queue<E> extends Collection<E> { |
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