[brailleblaster] Re: Braille Blaster and Java versions
- From: "Vic Beckley" <vic.beckley3@xxxxxxxxx>
- To: <brailleblaster@xxxxxxxxxxxxx>
- Date: Sat, 10 Mar 2012 20:58:22 -0500
John,
Probably the reason the 32-bit version is working is that I didn't compile
the brailleblaster.jar file. The DLLs must not be affected. Are you using
Java 6?
Best regards from Ohio, U.S.A.,
Vic
E-mail: vic.beckley3@xxxxxxxxx
-----Original Message-----
From: brailleblaster-bounce@xxxxxxxxxxxxx
[mailto:brailleblaster-bounce@xxxxxxxxxxxxx] On Behalf Of John J. Boyer
Sent: Saturday, March 10, 2012 8:54 PM
To: brailleblaster@xxxxxxxxxxxxx
Subject: [brailleblaster] Re: Braille Blaster and Java versions
Vic,
I'm surprissed that Java 7 isn't backward compatible with Java 6. It
looks like the problem may be in the manifest, and could be an Ant
problem. However, there are others on this list who are more
knowledgeable. I know that some people are using your 32-bit version of
BrailleBlaster 1.3.0. Hopefully someone knows of an easy fix.
Questions for others. BrailleBlaster was written using Java 1.6, because
that was what was available. Does Java 1.7 have features that would be
useful to us? Would switching to Java 1.7 cause more compatibility
problems?
Thanks,
John
On Sat, Mar 10, 2012 at 07:30:18PM -0500, Vic Beckley wrote:
> John,
>
> I am compiling Braille Blaster and the DLLs using version 7 of the Java
JDK.
> I am having no problems with running what I compile on the same Java
> version. I just gave a copy of my 32-bit version to a friend to try out.
He
> is running Java version 6. It won't run. He gets the below error. I also
> tried it on my laptop, which also has Java 6, and got the same error.
>
> Exception in thread "main" java.lang.UnsupportedClassVersionError:
> org/brailleblaster/Main : Unsupported major.minor version 51.0
> at java.lang.ClassLoader.defineClass1(Native Method)
> at java.lang.ClassLoader.defineClassCond(Unknown Source)
> at java.lang.ClassLoader.defineClass(Unknown Source)
> at java.security.SecureClassLoader.defineClass(Unknown Source)
> at java.net.URLClassLoader.defineClass(Unknown Source)
> at java.net.URLClassLoader.access$000(Unknown Source)
> at java.net.URLClassLoader$1.run(Unknown Source)
> at java.security.AccessController.doPrivileged(Native Method)
> at java.net.URLClassLoader.findClass(Unknown Source)
> at java.lang.ClassLoader.loadClass(Unknown Source)
> at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
> at java.lang.ClassLoader.loadClass(Unknown Source)
> Could not find the main class: org.brailleblaster.Main. Program will exit.
>
> Any ideas what would cause this? Will I have to compile with Java 6? If
so,
> will it run on Java 7?
>
> Is anyone running my 32-bit Windows release of Braille Blaster 1.3.0
> successfully? If so, what Java version do you have?
>
>
> Best regards from Ohio, U.S.A.,
>
> Vic
> E-mail: vic.beckley3@xxxxxxxxx
>
>
>
--
John J. Boyer; President, Chief Software Developer
Abilitiessoft, Inc.
http://www.abilitiessoft.com
Madison, Wisconsin USA
Developing software for people with disabilities
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