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You need to quickly compute hashes from Strings (for example in order to safely store passwords into a database) ?
Well, just have a look a my project named hashutils
It simply provides one utiliy class that exposes simple methods to compute hashes from Strings using the following algorithms :

MD5
sha1
sha256
sha512

downlads
hashutils is hosted in our Maven2 repository.
You can [...]

You are working on a GNU/Linux system with at least a 2.6.16 Kernel and are tired of getting ‘PermGen Space’ errors with Eclipse, whatever value you choose for -Xms, -Xmx and -XX:MaxPermSize settings ?
An explanation could be that Eclipse fails to claim memory that is not really used by the system, but simply cached.
A solution [...]