[brailleblaster] Re: Braille Blaster and Java versions
- From: "John J. Boyer" <john.boyer@xxxxxxxxxxxxxxxxx>
- To: brailleblaster@xxxxxxxxxxxxx
- Date: Sat, 10 Mar 2012 20:14:29 -0600
Hi Vic,
I replied before I saw Michael's messages. The dlls shouldn't be
affected. For now the best course is probably to compile on Java 6.
After a while everybody will have 7. You can install 6 on your 32-bit
vm. The Java byte code is platform-independent.
John
On Sat, Mar 10, 2012 at 08:58:22PM -0500, Vic Beckley wrote:
> 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
>
>
--
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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