How can I get a value from Task in jBPM

[redbees]

The problem is I want to get a value from jBPM after calculate but I don't know how.

Example:

My script task:

System.out.println("jBPM running ...");

kcontext.setVariable("result", 7);

The question is how can I get the value of result from Java:

public static void startJbpmModel(String methodName, int num) {

  int result = 0;

  KnowledgeBase kbase = readKnowledgeBase();

  StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();

  ksession.startProcess("pics");

// how can I get the value from here ?

  }

Thank you for any suggestion, and I'm very new in jBPM so my apology if I bother your time.

[marshalslee]

I think you must get TaskService Object first.Then query active task by TaskService.

[redbees]

Thanks for your suggestion but I try another way:

WorkflowProcessInstance instance = (WorkflowProcessInstance) ksession.startProcess("pics", params);

Object returnValue = (Object) instance.getVariable("result");

And it's worked.