Why do I get an OutOfMemoryError when inserting 50,000 objects into HashMap?

Question

I am trying to insert about 50,000 objects (and therefore 50,000 keys) into a java.util.HashMap. However, I keep getting an OutOfMemo

Answer 1

Random thought: The hash buckets associated with HashMap are not particularly memory efficient. You may want to try out TreeMap as an alternative and see if it still provide sufficient performance.