Hello World Error

[jaguarg]

Hi,

Have just tried the HelloWorld java example and I don't understand the error I am getting when launching LS.
Any idea?

jag

04.Nov.08 22:27:51,484 <ERROR> Data adapter HELLOWORLD.DEFAULT init error
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 com.lightstreamer.a.wb.loadClass(wb.java)
        at com.lightstreamer.g.z.c(z.java)
        at com.lightstreamer.g.z.a(z.java)
        at com.lightstreamer.g.z.b(z.java)
        at com.lightstreamer.g.g.a(g.java)
        at com.lightstreamer.a.p.run(p.java)
04.Nov.08 22:27:51,501 <ERROR> Error while loading the Adapters
java.lang.Exception: Unexpected error
        at com.lightstreamer.g.z.a(z.java)
        at com.lightstreamer.g.z.b(z.java)
        at com.lightstreamer.g.g.a(g.java)
        at com.lightstreamer.a.p.run(p.java)
Caused by: 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 com.lightstreamer.a.wb.loadClass(wb.java)
        at com.lightstreamer.g.z.c(z.java)
        ... 4 more