Re: Watchout! A newbie - help needed with jxta on windows

John Barry wrote:
> Hi Ranga,
>
> The first error is JXTA rying to determine your proxy settings.  I have
> never seen this error, but I doubt that it is fatal and it should not
> cause any problems unless you are behind a proxy server.
>
> The second problem is usually caused by runnong JXTA on a pre 1.5
> version of Java.  Java 1.5 is required.
>   
Thanks. This is probably what I missed. I have tried everything and kept 
getting compilation errors.  I even tried to compile jxta but got syntax 
errors there too. I have been confused by the Java versioning 
conventions. Now downloading jsdk 1.5.
After some stumbling, I got there. I know have a number of jre 
directories and a couple of jsdk and jdk.
Can I get rid of all of these but the latest jdk 1.5? Should it not be 
downward compatible?
I dont have anything critical running on my box.
Thanks again for the help.
> Regards,
> John
>
> -----Original Message-----
> From: Ranga Nathan [mailto:[email protected]] 
> Sent: Sunday, May 21, 2006 1:12 AM
> To: [email protected]
> Subject: [JXTA user] Watchout! A newbie - help needed with jxta on
> windows
>
> I am unable to bring up jxta for jsdk on windows. I am new not only to 
> jxta but to java as well. When running "jxta" I get this error:
>
>     C:\jxta-shell-2.3.7\shell>jxta
>     Failed reading value of registry key:
>             Software\Microsoft\Windows\CurrentVersion\Internet
>     Settings\ProxyServer\
>     ProxyServer
>     "C:\Program Files\Java\j2re1.4.2_06\bin\javaw.exe" -cp
>     .;..\lib\bcprov-jdk14.jar
>  
> ;..\lib\javax.servlet.jar;..\lib\jdom.jar;..\lib\jxta.jar;..\lib\jxtaext
> .jar;..\
>  
> lib\jxtashell.jar;..\lib\log4j.jar;..\lib\org.mortbay.jetty.jar;..\lib\s
> wixml.ja
>     r net.jxta.impl.peergroup.Boot
>
>
> Nowhere in the README there is any mention of registry!
>
> I also downloaded the program guide which comes with own jxta 
> packaging.  There I get "Unsupported version" error.
>
>     C:\jxta_devguide\HelloWorld>runit
>
>     C:\jxta_devguide\HelloWorld>java   -classpath
>     ..\lib\jxta.jar;..\lib\log4j.jar;.
>     .\lib\bcprov-jdk14.jar;. SimpleJxtaApp
>     Exception in thread "main" java.lang.UnsupportedClassVersionError:
>     net/jxta/exce
>     ption/PeerGroupException (Unsupported major.minor version 49.0)
>             at java.lang.ClassLoader.defineClass0(Native Method)
>             at java.lang.ClassLoader.defineClass(ClassLoader.java:539)
>             at
>  
> java.security.SecureClassLoader.defineClass(SecureClassLoader.java:12
>     3)
>             at
> java.net.URLClassLoader.defineClass(URLClassLoader.java:251)
>             at
> java.net.URLClassLoader.access$100(URLClassLoader.java:55)
>             at java.net.URLClassLoader$1.run(URLClassLoader.java:194)
>             at java.security.AccessController.doPrivileged(Native
> Method)
>             at
> java.net.URLClassLoader.findClass(URLClassLoader.java:187)
>             at java.lang.ClassLoader.loadClass(ClassLoader.java:289)
>             at
> sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:274)
>             at java.lang.ClassLoader.loadClass(ClassLoader.java:235)
>             at
> java.lang.ClassLoader.loadClassInternal(ClassLoader.java:302)
>
>
>