[Tinyos-help] Java Version Problem

[Philip Levis]

On Dec 31, 2008, at 7:52 AM, Xin Dong wrote:

> Hi
>
> I installed tinyos 2.1 in my ubuntu Intrepid Ibex 64bit using the  
> repository. The jre required by tinyos package is 1.5, but every  
> time I compile code for micaz there is
> Exception in thread "main" java.lang.UnsupportedClassVersionError:  
> Bad version number in .class file
>     at java.lang.ClassLoader.defineClass1(Native Method)
>     at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
>     at  
> java.security.SecureClassLoader.defineClass(SecureClassLoader.java: 
> 124)
>     at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
>     at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
>     at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
>     at java.security.AccessController.doPrivileged(Native Method)
>     at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
>     at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
>     at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268)
>     at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
>     at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
>
> I solved this problem by installing and using jre 6. However, when I  
> use "tos-check-env", it tells me that I should use jre 1.4 or 1.5. I  
> think this may be a bug.

I'll look into this next week; you're probably right.

Phil