I am new to Jython. I have installed Jython 2.2 and try to start a Jython interactive session by entering




The following is return


Usage: java [-options] class [args...]

           (to execute a class)

   or  java [-options] -jar jarfile [args...]

           (to execute a jar file)


where options include:

    -client       to select the "client" VM

    -server       to select the "server" VM

    -hotspot      is a synonym for the "client" VM  [deprecated]

                  The default VM is client.


    -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.


                  set a system property


                  enable verbose output

    -version      print product version and exit


                  require the specified version to run

    -showversion  print product version and continue

    -jre-restrict-search | -jre-no-restrict-search

                  include/exclude user private JREs in the version search

    -? -help      print this help message

    -X            print help on non-standard options



                  enable assertions



                  disable assertions

    -esa | -enablesystemassertions

                  enable system assertions

    -dsa | -disablesystemassertions

                  disable system assertions


                  load native agent library <libname>, e.g. -agentlib:hprof

                    see also, -agentlib:jdwp=help and -agentlib:hprof=help


                  load native agent library by full pathname


                  load Java programming language agent, see java.lang.instrument



Could any one let me know what I have done wrong.


I have include c:\jython2.2 in my PATH variable and I use window xp environment.



Ying Moy