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compare method arguments ?

aslika bahini
Ranch Hand

Joined: Mar 03, 2007
Posts: 111




PQsort pqs = new PQsort();
Priorityqueue<Ingeger> pq2 = new priorityqueue<Integers>(10,pqs);

Creates a PriorityQueue with the specified initial capacity that
orders its elements according to the specified comparator.

initialCapacity - the initial capacity for this priority queue.
comparator - the comparator used to order this priority queue. If
null then the order depends on the elements'
natural ordering.

the 2nd parameter in the priorityqueue constructor invokes the
compare of method. (which happens behind the scene)
what arguments are passed inside compare of method?
say here public int compare(Integer one, Integer two)
what one and two holds?
can anyone explain

Thanks
samura



marc weber
Sheriff

Joined: Aug 31, 2004
Posts: 11343


This might not completely answer your question, but it should suggest an approach to investigating questions like this.
[ July 02, 2007: Message edited by: marc weber ]

"We're kind of on the level of crossword puzzle writers... And no one ever goes to them and gives them an award." ~Joe Strummer
sscce.org
aslika bahini
Ranch Hand

Joined: Mar 03, 2007
Posts: 111
ObjectArrayPriorityQueue(int capacity, Comparator c)
Creates a new empty queue with a given capacity and comparator.

Is the above one is same as this
priorityqueue(int capacity, Comparator c)?

Thanks
samura
marc weber
Sheriff

Joined: Aug 31, 2004
Posts: 11343

These are entirely different classes:
  • PriorityQueue is part of Sun's standard Java API.
  • ObjectArrayPriorityQueue is a third-party class from fastutil. (See the fastutil site for details.)
  • No third-party classes are covered in the SCJP exam.
     
    Don't get me started about those stupid light bulbs.
     
    subject: compare method arguments ?