JOSM aborts with latest Sun JAVA SDK (1.5.0.8, Linux/x86_64/Fedora Core 6/AMD Opteron)

[brwk@…]

% java -jar josm-latest.jar
Exception in thread "main" java.lang.NoClassDefFoundError: org.openstreetmap.josm.Main

at java.lang.Class.initializeClass(libgcj.so.7rh)
at java.lang.Class.initializeClass(libgcj.so.7rh)

Caused by: java.lang.ClassNotFoundException: java.util.concurrent.Executor not found in gnu.gcj.runtime.SystemClassLoader{urls=[file:josm-latest.jar], parent=gnu.gcj.runtime.ExtensionClassLoader{urls=[], parent=null}}

at java.net.URLClassLoader.findClass(libgcj.so.7rh)
at java.lang.ClassLoader.loadClass(libgcj.so.7rh)
at java.lang.ClassLoader.loadClass(libgcj.so.7rh)
at java.lang.Class.initializeClass(libgcj.so.7rh)
...1 more

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[imi]

JOSM cannot be run under gnu classpth nor gcj (yet). Install the JRE from Sun, Blackdown or IBM (which are all roughly the same).