[freeslave]

Nothing wrong with using Java and there is something to be said for using the language you are most productive in. But if you are thinking of building a web crawler in Java, I would recommend taking a look at the Heritrix project: https://webarchive.jira.com/wiki/display/Heritrix/Heritrix It's robust, open source and easily extensible. Might be easier to write a custom module for it than to roll your own web crawler.