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Priority Queue

 
Greenhorn
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what is the difference between Priority Queue add() and offer() method ?
 
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If you read the API you would have seen that add() can throw an IllegalStateException if the capacity restrictions would be violated. offer() does not, but returns false instead.

From the API of Queue.offer():

When using a capacity-restricted queue, this method is generally preferable to add(E), which can fail to insert an element only by throwing an exception.

 
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