Easiest way to use these is to copy to core/java/src/net/i2p/util in the i2p.i2p branch, then ant buildCore, then java -cp core/java/build/i2p.jar net.i2p.util.blahblah args
Easiest way to use these is to copy to core/java/src/net/i2p/util in the i2p.i2p branch, then ant buildCore, then java -cp core/java/build/i2p.jar net.i2p.util.blahblah args