Finding the number of documents in a lucene index

Question

Using Java how would you find out the number of documents in an lucene index?

Answer 1

IndexReader contains the methods you need, in particular, numDocs

http://hudson.zones.apache.org/hudson/job/Lucene-trunk/javadoc//org/apache/lucene/index/IndexReader.html#numDocs()

Answer 2

The official documentation: http://lucene.apache.org/java/2_4_0/api/org/apache/lucene/index/IndexReader.html#numDocs()