Dificuldade na instalação

<blockquote>

-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.

-D<name>=<value>

set a system property

-verbose[:class|gc|jni]

enable verbose output

-version      print product version and exit

-version:<value>

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

-ea[:<packagename>…|:<classname>]

-enableassertions[:<packagename>…|:<classname>]

enable assertions

-da[:<packagename>…|:<classname>]

-disableassertions[:<packagename>…|:<classname>]

disable assertions

-esa | -enablesystemassertions

enable system assertions

-dsa | -disablesystemassertions

disable system assertions

-agentlib:<libname>[=<options>]

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

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

-agentpath:<pathname>[=<options>]

load native agent library by full pathname

-javaagent:<jarpath>[=<options>]

load Java programming language agent, see java.lang.instrument</blockquote>

É que está tudo OK!