GIJ(1)                               GNU                              GIJ(1)

NAME         top

       gij - GNU interpreter for Java bytecode

SYNOPSIS         top

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

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

DESCRIPTION         top

       "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

       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         top

       -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.

           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.

           Equivalent to "-Xms".

           Equivalent to "-Xmx".

           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.

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

               Set the initial heap size.

               Set the maximum heap size.

               Set the thread stack size.

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

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

       -?  Print help, then exit.

           Print version number and continue.

           Print detailed version information, then exit.

           Print version number, then exit.

           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

SEE ALSO         top

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

COPYRIGHT         top

       Copyright (c) 2001-2016 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.

COLOPHON         top

       This page is part of the gcc (GNU Compiler Collection) project.
       Information about the project can be found at ⟨⟩.
       If you have a bug report for this manual page, see 
       ⟨⟩.  This page was obtained from the tarball
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       ⟨⟩ on 2017-04-25.
       If you discover any rendering problems in this HTML version of the
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       send a mail to

gcc-6.3.0                        2016-12-21                           GIJ(1)