command

(1) JCommando

http://jcommando.sourceforge.net/

(2) jopt-simple 

http://pholser.github.io/jopt-simple/

(3) Commons CLI 

http://commons.apache.org/proper/commons-cli/

(4) JSAP v2.1: the Java Simple Argument Parser 

http://www.martiansoftware.com/jsap/

(5) GNU getopt – Java port

http://www.urbanophile.com/arenn/hacking/download.html

(6) JArgs Command Line Option

http://jargs.sourceforge.net/

(7) Java Gems

https://code.google.com/p/javagems/

(8) Natural CLI

http://naturalcli.sourceforge.net/

(9) JewelCli

http://jewelcli.lexicalscope.com/