Inserts the specified element into this queue if it is possible to do so
immediately without violating capacity restrictions, returning
{@code true} upon success and throwing an {@code IllegalStateException}
if no space is currently available.
@param e the element to add
@return {@code true} (as specified by {@link Collection#add})
@throws IllegalStateException if the element cannot be added at this
time due to capacity restrictions
@throws ClassCastException if the class of the specified element
prevents it from being added to this queue
@throws NullPointerException if the specified element is null and
this queue does not permit null elements
@throws IllegalArgumentException if some property of this element
prevents it from being added to this queue
Inserts the specified element into this queue if it is possible to do so immediately without violating capacity restrictions, returning {@code true} upon success and throwing an {@code IllegalStateException} if no space is currently available.
@param e the element to add @return {@code true} (as specified by {@link Collection#add}) @throws IllegalStateException if the element cannot be added at this time due to capacity restrictions @throws ClassCastException if the class of the specified element prevents it from being added to this queue @throws NullPointerException if the specified element is null and this queue does not permit null elements @throws IllegalArgumentException if some property of this element prevents it from being added to this queue