We're talking about at least 2 kinds of JDK levels. 2-1. SDO usage(byte code) level: as long as SDO libraries can run on JDK 1.4, spec 2.1 is satisfied. 2-2. SDO implementation(source code) compilation level: SDO implementation can be compiled by JDK 1.5 as long as the generated byte code can run on JDK 1.4
-- Yang ZHONG
