# rJAMM Download

This page describes the process of obtaining a copy of rJAMM. First, read the following license agreement.

### Java Applets Made Multiuser (JAMM) GENERAL PUBLIC LICENSE

All Java Applets Made Multiuser (JAMM) programs, and all files and documents included in any JAMM distribution are Copyright (C) by Virginia Tech except where noted within a file that it is copyrighted by some other source. This GENERAL PUBLIC LICENSE discusses the terms and conditions under which you may use, copy and redistribute our products. In general, our goal is to make these products as easy and convenient for you to use, but only so far as 1) We are protected from liability and responsibility for the result of your using them; 2) The general public is protected from the result of your changing them; and 3) You do not make a profit from their further redistribution without first obtaining our permission. The first two conditions are covered by the fact that we hereby include as part of this license all parts of the GNU GENERAL PUBLIC LICENSE Version 1, dated February 1989. A copy of this document is included in this file. The third condition is satisfied by the following additional restriction: You may make copies of a JAMM program or product and redistribute them under the conditions of the GNU GENERAL PUBLIC LICENSE. You may charge a fee for the physical act of producing and distributing the copy. This fee may include a charge for the actual cost to you of the materials involved, as well as a reasonable charge for the labor involved (but never more than $10.00 US for labor per copy distributed). If you wish to distribute our programs or products under less restrictive conditions, you must first receive our express written approval. You can contact the JAMM team via email at

JAMM <jamm@simon.cs.vt.edu>

or by regular mail at:

JAMM
c/o James "Bo" Begole
Department of Computer Science
Virginia Tech
Blacksburg, VA 24061

Java Applets Made Multiuser (JAMM) and all files and documents included in any JAMM distribution are Copyright (C) 1997 Virginia Tech. You may use these programs under the conditions of the JAMM GENERAL PUBLIC LICENSE which is contained in this file, "license.txt". The JAMM GENERAL PUBLIC LICENSE includes the GNU GENERAL PUBLIC LICENSE terms and conditions that appear below.

### GNU GENERAL PUBLIC LICENSE Version 1, February 1989

Copyright (C) 1989 Free Software Foundation, Inc. 675 Mass Ave, Cambridge, MA 02139, USA Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed.
Preamble
The license agreements of most software companies try to keep users at the mercy of those companies. By contrast, our General Public License is intended to guarantee your freedom to share and change free software--to make sure the software is free for all its users. The General Public License applies to the Free Software Foundation's software and to any other program whose authors commit to using it. You can use it for your programs, too. When we speak of free software, we are referring to freedom, not price. Specifically, the General Public License is designed to make sure that you have the freedom to give away or sell copies of free software, that you receive source code or can get it if you want it, that you can change the software or use pieces of it in new free programs; and that you know you can do these things. To protect your rights, we need to make restrictions that forbid anyone to deny you these rights or to ask you to surrender the rights. These restrictions translate to certain responsibilities for you if you distribute copies of the software, or if you modify it. For example, if you distribute copies of a such a program, whether gratis or for a fee, you must give the recipients all the rights that you have. You must make sure that they, too, receive or can get the source code. And you must tell them their rights. We protect your rights with two steps: (1) copyright the software, and (2) offer you this license which gives you legal permission to copy, distribute and/or modify the software. Also, for each author's protection and ours, we want to make certain that everyone understands that there is no warranty for this free software. If the software is modified by someone else and passed on, we want its recipients to know that what they have is not the original, so that any problems introduced by others will not reflect on the original authors' reputations. The precise terms and conditions for copying, distribution and modification follow.

### GNU GENERAL PUBLIC LICENSE TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

0. This License Agreement applies to any program or other work which contains a notice placed by the copyright holder saying it may be distributed under the terms of this General Public License. The "Program", below, refers to any such program or work, and a "work based on the Program" means either the Program or any work containing the Program or a portion of it, either verbatim or with modifications. Each licensee is addressed as "you". 1. You may copy and distribute verbatim copies of the Program's source code as you receive it, in any medium, provided that you conspicuously and appropriately publish on each copy an appropriate copyright notice and disclaimer of warranty; keep intact all the notices that refer to this General Public License and to the absence of any warranty; and give any other recipients of the Program a copy of this General Public License along with the Program. You may charge a fee for the physical act of transferring a copy. 2. You may modify your copy or copies of the Program or any portion of it, and copy and distribute such modifications under the terms of Paragraph 1 above, provided that you also do the following:

a) cause the modified files to carry prominent notices stating that you changed the files and the date of any change; and b) cause the whole of any work that you distribute or publish, that in whole or in part contains the Program or any part thereof, either with or without modifications, to be licensed at no charge to all third parties under the terms of this General Public License (except that you may choose to grant warranty protection to some or all third parties, at your option). c) If the modified program normally reads commands interactively when run, you must cause it, when started running for such interactive use in the simplest and most usual way, to print or display an announcement including an appropriate copyright notice and a notice that there is no warranty (or else, saying that you provide a warranty) and that users may redistribute the program under these conditions, and telling the user how to view a copy of this General Public License. d) You may charge a fee for the physical act of transferring a copy, and you may at your option offer warranty protection in exchange for a fee.

Mere aggregation of another independent work with the Program (or its derivative) on a volume of a storage or distribution medium does not bring the other work under the scope of these terms. 3. You may copy and distribute the Program (or a portion or derivative of it, under Paragraph 2) in object code or executable form under the terms of Paragraphs 1 and 2 above provided that you also do one of the following:

a) accompany it with the complete corresponding machine-readable source code, which must be distributed under the terms of Paragraphs 1 and 2 above; or, b) accompany it with a written offer, valid for at least three years, to give any third party free (except for a nominal charge for the cost of distribution) a complete machine-readable copy of the corresponding source code, to be distributed under the terms of Paragraphs 1 and 2 above; or, c) accompany it with the information you received as to where the corresponding source code may be obtained. (This alternative is allowed only for non-commercial distribution and only if you received the program in object code or executable form alone.)

Source code for a work means the preferred form of the work for making modifications to it. For an executable file, complete source code means all the source code for all modules it contains; but, as a special exception, it need not include source code for modules which are standard libraries that accompany the operating system on which the executable file runs, or for standard header files or definitions files that accompany that operating system. 4. You may not copy, modify, sub-license, distribute or transfer the Program except as expressly provided under this General Public License. Any attempt otherwise to copy, modify, sub-license, distribute or transfer the Program is void, and will automatically terminate your rights to use the Program under this License. However, parties who have received copies, or rights to use copies, from you under this General Public License will not have their licenses terminated so long as such parties remain in full compliance. 5. By copying, distributing or modifying the Program (or any work based on the Program) you indicate your acceptance of this license to do so, and all its terms and conditions. 6. Each time you redistribute the Program (or any work based on the Program), the recipient automatically receives a license from the original licensor to copy, distribute or modify the Program subject to these terms and conditions. You may not impose any further restrictions on the recipients' exercise of the rights granted herein. 7. The Free Software Foundation may publish revised and/or new versions of the General Public License from time to time. Such new versions will be similar in spirit to the present version, but may differ in detail to address new problems or concerns. Each version is given a distinguishing version number. If the Program specifies a version number of the license which applies to it and "any later version", you have the option of following the terms and conditions either of that version or of any later version published by the Free Software Foundation. If the Program does not specify a version number of the license, you may choose any version ever published by the Free Software Foundation. 8. If you wish to incorporate parts of the Program into other free programs whose distribution conditions are different, write to the author to ask for permission. For software which is copyrighted by the Free Software Foundation, write to the Free Software Foundation; we sometimes make exceptions for this. Our decision will be guided by the two goals of preserving the free status of all derivatives of our free software and of promoting the sharing and reuse of software generally.

### NO WARRANTY

9. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 10. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. END OF TERMS AND CONDITIONS

rJAMM requires the installation of Swing and either the Java Runtime Environment 1.1.x (JRE) or the Java Development Kit 1.1.x (JDK) . JAMM has not been tested on any other Java virtual machines, but may work if the Installation instructions are modified to suit.

By selecting any of the rJAMM distribution file links you acknowledge that you have read and agree to the license defined previously in this file. rJAMM Version 1.0 - works with Swing 1.0.
Posted 3/1/98.

#### Complete Distribution

If you do not already have Swing and either the Java Runtime Environment 1.1.x (JRE) or the Java Development Kit 1.1.x (JDK) , you may want to download one of these large JAMM distribution files. These distribution files include JAMM, Swing and JRE. After downloading, follow the Easy JAMM distribution installation.

1. ZIP compressed file (rJAMM1.0-complete-win32.zip) approx 6.0 MB (MS DOS/Windows)
2. tar and gzipped file (rJAMM1.0-complete-solaris.tar.gz) approx. 12.6 MB (UNIX)
3. tar and compressed file (rJAMM1.0-complete-solaris.tar.Z) approx. 17.2 MB (UNIX)

#### Small Distribution

If you do already have Swing and either the Java Runtime Environment 1.1.x (JRE) or the Java Development Kit 1.1.x (JDK) , you may want to download these smaller files. After downloading, follow the Small JAMM distribution installation.

1. ZIP compressed file (rJAMM1.0.zip) approx 900 KB (MS DOS/Windows)
2. tar and gzipped file (rJAMM1.0.tar.gz) approx. 780 KB (UNIX)
3. tar and compressed file (rJAMM1.0.tar.Z) approx. 1105 KB (UNIX)

rJAMM Version 0.7c - works with Swing 0.7. This version of JAMM includes all of the features of version 0.7 with added support for concurrent editing in Text Areas.
Posted 1/30/98 -- Will be removed 3/31/98.

#### Complete Distribution

1. ZIP compressed file (rJAMM0.7c-complete-win32.zip) approx 4.0 MB (MS DOS/Windows)
2. tar and gzipped file (rJAMM0.7c-complete-solaris.tar.gz) approx. 10.7 MB (UNIX)
3. tar and compressed file (rJAMM0.7c-complete-solaris.tar.Z) approx. 14.5 MB (UNIX)

#### Small Distribution

1. ZIP compressed file (rJAMM0.7c.zip) approx 765 KB (MS DOS/Windows)
2. tar and gzipped file (rJAMM0.7c.tar.gz) approx. 650 KB (UNIX)
3. tar and compressed file (rJAMM0.7c.tar.Z) approx. 930 KB (UNIX)

Older versions of JAMM that work with Swing 0.5.1 and 0.6.1 are available on request. Send email to JAMM <jamm@simon.cs.vt.edu>.

### Other Shareable Components

You may download these jar files to run other Swing-based components. To install, put the .jar file in the directory, `rJAMM<version>/jars` . Then put the script and/or DOS batch file named `run_<component_name>` in the directory, `rJAMM<version>/bin` . Follow the instructions in the User's Guide for starting and using a shared component.

Block and Plane physics simulation
  This educational application, developed by the LiNC project, simulates the classic physics experiment of sliding a mass (the block) down an inclined plane. Students can change many physical parameters (plane's friction, block's mass, even the force of gravity. In this example, two students are analyzing different parts of the simulation's output.
  (click on the image for a full-size view)
  Requires Swing 0.7 and rJAMM 0.7 or rJAMM 0.7c.
  - BlockAndPlaneSim_10.jar approx. 400 KB
  - run_BlockAndPlane UNIX script
  - run_BlockAndPlane.bat DOS batch file
More samples to come ....

### rJAMM Installation Instructions

Top Level rJAMM
JAMM Home