the java bytecodes remain unchanged from jvm 5 to 6. The bytecode is all the jvm sees. Thus the backward compatibility does work almost perfectly. Also jvm 6 ha

the java bytecodes remain unchanged from jvm 5 to 6. The bytecode is all the jvm sees. Thus the backward compatibility does work almost perfectly. Also jvm 6 has been out for long enough now to have ironed out any potential issues if there existed any in the first place.