Which java3d version is installed locally?

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javamad - 21 Oct 2003 11:50 GMT

Hi there,

I am a newbie at java3d and would like to know if there is anyway of
knowing through the API or otherwise which version of java3d I have
installed on my machine.

It would be perfect if there was a class I could inquire with maybe a
getVersion() or maybe a property value, such as, System.getProperty(
"java3d.version" )?

Thanx in advance,

Fabricio.

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LeW - 21 Oct 2003 15:32 GMT

good question;
I'm interested to;
what is the best way of java3d version detecting..

p.s.:
..u can determine active version of your java instaliations by typing via "command
prompt": java -version

> Hi there,
>
[quoted text clipped - 9 lines]
>
> Fabricio.

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javamad - 22 Oct 2003 11:27 GMT

Hi LeW,

Found a way to do it, it depends on the fact that certain classes of
jvava3d exist only on version 1.3 and not on version 1.2 for it to work
(you can do the same with other versions too, just find out which new
classes were introduced in each).

Here's a sample code of a class that detects the presence of java3d 1.3
by searching for class javax.media.j3d.TransformInterpolator (that
exists in java3d 1.3 but not on the earlier releases)

----CODE BEGINS----
import java.io.*;

public class Threed {

public Threed() {
// Try to load a java3d class to see if it exists
// class TransformInterpolator was introduced in java3d 1.3
// so if user has java3d 1.2 it will not recognise it.
try {
ClassLoader loader = ClassLoader.getSystemClassLoader();
loader.loadClass( "javax.media.j3d.TransformInterpolator" );
System.out.println( "Java3D 1.3 is installed!" );
}
catch ( ClassNotFoundException e ) {
System.out.println( "It looks like java3D 1.3 is not
installed!" );
}
}

public static void main( String[] args ) {
System.out.println( "Checking if java3D 1.3 is installed, please
wait..." );

Threed t = new Threed();
}

}
----CODE ENDS----

Regards,

Fabricio.

> good question;
> I'm interested to;
[quoted text clipped - 17 lines]
>>
>> Fabricio.

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LeW - 22 Oct 2003 12:18 GMT

understood.
thanks.
the way of detection is not "standart/direct", but works..

..anybody has more ideas?

"javamad" <dontwantnospam@nospam.com> wrote in message
news:Xns941C7460C3576georgiaRibeiraoPreto@212.159.13.2...

> Hi LeW,
>
> Found a way to do it, it depends on the fact that certain classes of
> jvava3d exist only on version 1.3 and not on version 1.2 for it to work
> (you can do the same with other versions too, just find out which new
> classes were introduced in each).

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P. Flavin - 23 Oct 2003 17:05 GMT

Yes, you can find the version of Java3d in your machine.

Here's the info on mine:

Extension-Name: javax.media.j3d

Implementation-Version: 1.3.0
-----------------------------

Manifest-Version: 1.0
Specification-Title: Java 3D API Specification
Created-By: 1.4.1 (Blackdown Java-Linux Team)
Implementation-Title: Java 3D Core Runtime Environment
Specification-Vendor: Sun Microsystems, Inc.
Specification-Version: 1.3
Implementation-Vendor-Id: com.sun
Extension-Name: javax.media.j3d
Implementation-Version: 1.3.0
Implementation-Vendor: Blackdown Java-Linux & Sun Microsystems, Inc.

I briefly looked from a run-time solution and I think
I can do it that way using either ClasLoader or Package
but I didn't try ...

The kludgy way I got the above info was
to unjar one of the Java3d .jar" files:

cp $JAVA_HOME/jre/lib/ext/j3dcore.jar .
jar xvf j3dcore.jar
more META-INF/MANIFEST.MF

Nasa and multiple NSF Funded projects at universities
around the country use Java3d for Web Animation
and deployed networked applications including
Nasa's Mars Rover WITS VRML 3d modeler & controller.

Nasa 3d Web Animation & Mars Robotic Rover VRML controler
----------------------------------------------------------
http://www.frontiernet.net/~imaging/Nasa_3d_animation.html

Expanding the question to find out the
Java3d runtime environment on deployed
Java3d web applets and applications onto
machines other than your own ( so not you
but your program can know what is available )
see below.

> Hi there,
>
[quoted text clipped - 9 lines]
>
> Fabricio.

Java enables web and network portable code
to be deployed via WebStart which installs
the multiple compomonets the program may require
and ensuring that current libaries are available
and install them if required and let the user
grant additional permissions if required and desired.

A NSF Funded Java3d VRML Webstart Archiology program
is shown below which you can try ( DANA ).

| The Extension Mechanism: Table of Contents
|
| Creating and Using Extensions
|
| Installed Extensions
| Download Extensions
| Understanding Extension Class Loading
|
http://java.sun.com/docs/books/tutorial/ext/TOC.html#basics

| java.lang Class Package
|
[quoted text clipped - 16 lines]
| compatible with a particular version, see the
| isCompatibleWith method for details.

http://java.sun.com/j2se/1.4.2/docs/api/java/lang/Package.html

| java.lang Class ClassLoader

| java.lang.Object
| java.lang.ClassLoader
[quoted text clipped - 14 lines]
| Every Class object contains a reference to the
| ClassLoader that defined it.

http://java.sun.com/j2se/1.4.2/docs/api/java/lang/ClassLoader.html

Extension Mechanism Architecture
--------------------------------
http://java.sun.com/j2se/1.4.2/docs/guide/extensions/spec.html

java3d-Extension-Name: javax.3d
java3d-Specification-Version: 1.0
java3d-Implementation-Version: 1.2.1
java3d-Implementation-Vendor-Id: com.sun

http://java.sun.com/j2se/1.3/docs/guide/extensions/versioning.html

Specifying Java Extensions in the applet

To deploy Java Extensions with applets, the applet
must be packaged as a JAR file. The MANIFEST file of
the applet must contain proper information about the
Java Extensions to be installed, according to the
Extension Versioning Specification. For example,

Extension-List: RectangleArea RectanglePerimeter
RectangleArea-Extension-Name: com.mycompany.RectangleArea
RectangleArea-Specification-Version: 1.2
RectangleArea-Implementation-Version: 1.2
RectangleArea-Implementation-Vendor-Id: com.mycompany
RectangleArea-Implementation-URL: http://mycompany.com/RectangleArea.jar
RectanglePerimeter-Extension-Name: com.mycompany.RectanglePerimeter
RectanglePerimeter-Specification-Version: 1.2
RectanglePerimeter-Implementation-Version: 1.2
RectanglePerimeter-Implementation-Vendor-Id: com.mycompany
RectanglePerimeter-Implementation-URL:
http://mycompany.com/RectanglePerimeter.jar

http://www.doc.ic.ac.uk/csg/java/1.4docs/guide/plugin/developer_guide/extensions
.html#specifying

http://www.j3d.org/tutorials/quick_fix/auto_install.html

http://java.sun.com/products/plugin/

Overview

Version 1.3 of the JavaTM 2 Platform introduced support for an
expanded set of Jar-file manifest attributes that enable applets to
specify version and vendor information for the optional packages that
they require. The manifests of Jar-packaged applets can specify a URL at
which the latest version of the optional package the Java Plug-in can
download if

* the needed optional package is not already installed in the
Java runtime environment, or
* the optional package is installed but has an out-of-date
version number, or
* the optional package is installed but is not from a specified
vendor.

The manifest attributes that can be used to specify version and
vendor information are described below.

http://java.sun.com/j2se/1.4.2/docs/guide/extensions/versioning.html

import java.applet.*;
import java.awt.*;
public class JavaVersionDisplayApplet extends Applet
{ private Label m_labVersionVendor;
public JavaVersionDisplayApplet() //constructor
{ Color colFrameBackground = Color.pink;
this.setBackground(colFrameBackground);
m_labVersionVendor = new Label (" Java Version: " +
System.getProperty("java.version")+
" from "+System.getProperty("java.vendor"));
this.add(m_labVersionVendor);
}
}
http://javatester.org/version.html

Java3d VRML viewer with Webstart ( Dana )
--------------------------------
http://atl.ndsu.edu/resources/dana-3d.php
http://testserv.archaeology.ndsu.nodak.edu/~abergstr/jnlp/dana-3d.jnlp
http://atl.ndsu.edu/danatutorial/
http://application.dana-wh.net/dana-wh.php
http://atl.ndsu.edu/archive/danainfo.php
http://atl.ndsu.edu/danatutorial/images/FIGURE7-AS-21-68-3-load3D.GIF

CruiseViewer Ocean Exploration Console
--------------------------------------
http://nsdl.sdsc.edu/tools/index.html
http://nsdl.sdsc.edu/apps/CruiseViewer_prod_20030821.jnlp

WebStart -- single click safe web installs
------------------------------------------
http://java.sun.com/products/javawebstart/demos.html
http://java.sun.com/products/javawebstart/developers.html

UndieWare - using Java's getProperities( ) function, demo
---------------------------------------------------------
http://www.frontiernet.net/~imaging/undieware.html

-- Paul, Java Developer & Web Animator
--------------------------------------
Imaging the Imagined: Modeling with Math & a Keyboard

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Which java3d version is installed locally?

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