Creating workflow and node in Java

Creating workflow and node in Java

I just start to learn java.
I have a question about way to build object for workflow and node.
I would like to create the workflow which is based on the node for example
each node will contains information such as 1. int time 2. int cost 3.
arraylist relationship 4. boolean is_traveled.
However, I am not really sure how to building workflow with nodes.
I keep searching "workflow" and"node" but it can't find reasonable resources.
Does anybody can give some example or useful resource ?
thanks