gij



GIJ(1)                                GNU                               GIJ(1)




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 sup-
       ported 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 compati-
       bility 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), jv-scan(1), jcf-dump(1), gfdl(7), and the Info
       entries for gcj and gcc.  gcc(1), gcj(1), gcjh(1), jv-scan(1),
       jcf-dump(1), gfdl(7), and the Info entries for gcj and gcc.


COPYRIGHT

       Copyright (c) 2001, 2002, 2003, 2004, 2005 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 1.2 or
       any later version published by the Free Software Foundation; with the
       Invariant Sections being ‘‘GNU General Public License’’, 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.



gcc-4.0.2                         2005-11-25                            GIJ(1)

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