What is IllegalStateException?

Question

I am trying to use the following Fastload API

connection ... etc is perfect.

---

I know exactly where it fails

 ...........
 System.out.pr         


        

Answer 1

Illegal State Exception is an Unchecked exception.

It indicate that method has been invoked at wrong time.

example:

Thread t = new Thread();
t.start();
//
//
t.start();

output:

Runtime Excpetion: IllegalThreadStateException

We cant start the Thread again, it will throw IllegalStateException.