To get started, have a look at one of the examples. Hopefully you will find the API pleasant to work with :)
Features of the library include:
- reading known_hosts files for host key verification
 - publickey, password and keyboard-interactive authentication
 - command, subsystem and shell channels
 - local and remote port forwarding
 - scp + complete sftp version 0-3 implementation
 
Implementations / adapters for the following algorithms are included:
- ciphers
 aes{128,192,256}-{cbc,ctr},blowfish-cbc,3des-cbc- key exchange
 diffie-hellman-group1-sha1,diffie-hellman-group14-sha1- signatures
 ssh-rsa,ssh-dss- mac
 hmac-md5,hmac-md5-96,hmac-sha1,hmac-sha1-96- compression
 zliband[email protected](delayed zlib)- private key files
 pkcs8encoded (what openssh uses)
If you need something that is not included, it shouldn't be too hard to add (do contribute it!)
Java 6+. slf4j is required. bouncycastle is highly recommended and required for using some of the crypto algorithms. jzlib is required for using zlib compression.
Fork away!