I have had a few issues trying to develop an addin in Java. The main issue is the code-modification testing cycle. I can initialize a new Java Addin app without problem. Then start ArcMap and connect the Addin via the customization tools. However, if I stop ArcMap to make changes to the code I find that I have to got to the Addin Manager and remove the Addin, restart ArcMap, the use the customization tool to enable the Addin again. This works most of the time, but not always. Any suggestions on what do. Thanks for any help.