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]
	 [@option{--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.get-
	   Property" method.

       -ms=number
	   This sets the initial heap size.

       -mx=number
	   This sets the maximum heap size.

       -X
       -Xargument
	   Supplying "-X" by itself will cause "gij" to list all the sup-
	   ported "-X" options.	 Currently there are none.  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.

       --version
	   Print version number, then exit.

SEE ALSO
       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 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-3.4.6			  2008-07-24			       GIJ(1)