NAME

       gij - GNU interpreter for Java bytecode

SYNOPSIS

       gij [OPTION] ... JARFILE [ARGS...]

       gij [-jar] [OPTION] ... CLASS [ARGS...]
         [-cp path] [-classpath path]
         [-Dname[=value]...]
         [-ms=number] [-mx=number]
         [-Xargument] [-verbose] [-verbose:class]
         [--showversion] [--version] [--help][-?]

DESCRIPTION

       "gij" is a Java bytecode interpreter included with "libgcj".  "gij" is not available on
       every platform; porting it requires a small amount of assembly programming which has not
       been done for all the targets supported by gcj.

       The primary argument to "gij" is the name of a class or, with "-jar", a jar file.  Options
       before this argument are interpreted by "gij"; remaining options are passed to the
       interpreted program.

       If a class name is specified and this class does not have a "main" method with the
       appropriate signature (a "static void" method with a "String[]" as its sole argument),
       then "gij" will print an error and exit.

       If a jar file is specified then "gij" will use information in it to determine which class'
       "main" method will be invoked.

       "gij" will invoke the "main" method with all the remaining command-line options.

       Note that "gij" is not limited to interpreting code.  Because "libgcj" includes a class
       loader which can dynamically load shared objects, it is possible to give "gij" the name of
       a class which has been compiled and put into a shared library on the class path.

OPTIONS

       -cp path
       -classpath path
           Set the initial class path.  The class path is used for finding class and resource
           files.  If specified, this option overrides the "CLASSPATH" environment variable.
           Note that this option is ignored if "-jar" is used.

       -Dname[=value]
           This defines a system property named name with value value.  If value is not specified
           then it defaults to the empty string.  These system properties are initialized at the
           program's startup and can be retrieved at runtime using the
           "java.lang.System.getProperty" method.

       -ms=number
           Equivalent to "-Xms".

       -mx=number
           Equivalent to "-Xmx".

       -noverify
           Do not verify compliance of bytecode with the VM specification. In addition, this
           option disables type verification which is otherwise performed on BC-ABI compiled
           code.

       -X
       -Xargument
           Supplying "-X" by itself will cause "gij" to list all the supported "-X" options.
           Currently these options are supported:

           -Xmssize
               Set the initial heap size.

           -Xmxsize
               Set the maximum heap size.

           -Xsssize
               Set the thread stack size.

           Unrecognized "-X" options are ignored, for compatibility with other runtimes.

       -jar
           This indicates that the name passed to "gij" should be interpreted as the name of a
           jar file, not a class.

       --help
       -?  Print help, then exit.

       --showversion
           Print version number and continue.

       --fullversion
           Print detailed version information, then exit.

       --version
           Print version number, then exit.

       -verbose
       -verbose:class
           Each time a class is initialized, print a short message on standard error.

       "gij" also recognizes and ignores the following options, for compatibility with existing
       application launch scripts: "-client", "-server", "-hotspot", "-jrockit", "-agentlib",
       "-agentpath", "-debug", "-d32", "-d64", "-javaagent", "-noclassgc", "-verify", and
       "-verifyremote".

SEE ALSO

       gcc(1), gcj(1), gcjh(1), jcf-dump(1), gfdl(7), and the Info entries for gcj and gcc.

COPYRIGHT

       Copyright (c) 2001-2013 Free Software Foundation, Inc.

       Permission is granted to copy, distribute and/or modify this document under the terms of
       the GNU Free Documentation License, Version 1.3 or any later version published by the Free
       Software Foundation; with no Invariant Sections, the Front-Cover Texts being (a) (see
       below), and with the Back-Cover Texts being (b) (see below).  A copy of the license is
       included in the man page gfdl(7).

       (a) The FSF's Front-Cover Text is:

            A GNU Manual

       (b) The FSF's Back-Cover Text is:

            You have freedom to copy and modify this GNU Manual, like GNU
            software.  Copies published by the Free Software Foundation raise
            funds for GNU development.