Java PriorityQueue with fixed size

Question

I am calculating a large number of possible resulting combinations of an algortihm. To sort this combinations I rate them with a double value und store them in PriorityQueue

Answer 1

There is a fixed size priority queue in Apache Lucene: http://lucene.apache.org/java/2_4_1/api/org/apache/lucene/util/PriorityQueue.html

It has excellent performance based on my tests.