look at the examples, the testcases etc. javacode is executed in the actionhandler. If you want to call external applications that are executables, I have to refere you to using google to find info on that. One of the first links I found is:
http://forum.java.sun.com/thread.jspa?threadID=559816&messageID=2749798
hth
I mean I have java file that call other application but I don't know how to use it as action in node.
1. Can I put the code for calling other application in side actionHandler file?
2. Another question is that, If create my standalone application, how to show process diagram and its status like your example pplication (websale)?
Thanks.