Inserts the specified element into this queue if it is possible to do so immediately without violating capacity restrictions. When using a capacity-restricted queue, this method is generally preferable to add, which can fail to insert an element only by throwing an exception.

Parameters:

e

the element to add

Returns:  true if the element was added to this queue, else false

Exceptions:

ClassCastException		if the class of the specified element prevents it from being added to this queue
NullPointerException		if the specified element is null and this queue does not permit null elements
IllegalArgumentException		if some property of this element prevents it from being added to this queue