Retrotranslator

Retrotranslator is a Java bytecode transformer that translates Java classes compiled with JDK 5.0 into classes that can be run on JVM 1.4. Of course there is a Maven plugin. I needed to do some unit testing of some code that uses JavaMail. Poking around I found mock-javamail that does just that. However, it is written in Java 5 and I am stuck in the prehistoric world of Java 1.4. At first, I converted the code to 1.4 but that leaves 2 different code bases. Then I was pointed at retrotranslator that would give a 1.4 compatible jar from 1.5 source. One code base. Nice.