Jasmin Home Page
Jasmin is a Java Assembler Interface. It takes ASCII descriptions
for Java classes, written in a simple assembler-like syntax and using
the Java Virtual Machine instruction set. It converts them into binary
Java class files suitable for loading into a JVM implementation.
The Java Virtual Machine is a platform-neutral runtime engine
used to execute Java programs. The JVM is generating a lot of interest
these days because of its secure, efficient multi-threaded architecture.
People are now developing compilers for other programming languages that
generate code which can be run on the Java Virtual Machine (see
my Resource Guide below).
Jasmin was written as the companion to the book "Java Virtual Machine",
published by O'Reilly, written by Troy Downing and myself.
(available now!) (see
Java Virtual Machine
- About Jasmin.
- Describes what Jasmin is, why I
wrote Jasmin, and the kinds of people who might be interested
- Jasmin User Guide
- A basic Jasmin user guide. It describes the
syntax of the assembler, and how to use it.
- Jasmin README
- The Jasmin README file that comes with the
- Jasmin FAQ
- Gives email feedback on Jasmin, and Q+A on the JVM in general.
- Java Virtual Machine Instruction Reference
- A quick reference for all of the JVM instructions. Includes
See my Resource Guide for a more
comprehensive list of online things to do with the Java Virtual Machine.
Java Cup, and
so you should check out these pages too.
You can obtain Jasmin 1.0 from:
This version of Jasmin is written in Java, and needs Sun's JDK 1.0
to run or equivalent. I have tested it under Solaris, SGI and Windows 95 (using
Symantec Cafe and Visual J++).
For people who use systems with filename restrictions, a copy of the
ZIP file containing the classes used by Jasmin is available
Register For Updates!!!
If you find Jasmin useful, send me email at firstname.lastname@example.org and I will add
your name to the list of people informed when new versions and bug fixes
If you have any questions or problems, you can email me at:
The following JVM disassemblers support Jasmin format:
D-JavaShawn Silverman has created a disassembler that can output files
in the Jasmin syntax. This lets you take a Java class
file, disassemble it, modify the VM code, and reassemble it. Versions
for Windows and Solaris are available. See
DJava (Java version)NEW!
Shawn Silverman has also created a new pure Java implementation of D-Java, which includes
a "builder" that lets you assemble, generate, and disassemble
.class files and provides a Jasmin output format. You can download this from
Shawn Silverman's FTP site, or see: Shawn Silverman's pages.
Markus Dahm has created the
which also provides a Java API to .class files, and includes the ability to
assemble, generate, and disassemble .class files and provides a
Jasmin output format. There is also a simple Mini language which uses
the JavaClass API.
Kimera DisassemblerThe folks at
have developed an online disassembler which
spits out Jasmin.
Jason Hunt (email@example.com) has written a Java assembler, which you
may want to check out. See
Java Grinder is another Java assembler/disassembler with
a text based syntax.
Copyright (1998) Jonathan Meyer, under the terms of
the GNU General Public License.
Work on Jasmin is supported in part by the
NYU Media Research Laboratory.
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