$ java -cp build/classes/java/main com.github.k0kubun.jjvm.JJVM -help Usage: jjvm [-options] class [args...] where options include -cp <class search path of directories and zip/jar files> -classpath <class search path of directories and zip/jar files> A : separated list of directories, JAR archives, and ZIP archives to search for class files. -help print this help message $ java -cp build/classes/