The class net.javacoding.jspider.core.threading.
WorkerThread has a method getState that clashes with
the Java 1.5 method in the superclass Thread. The
superclass expects the type java.lang.Thread.State to be
The Sun Java 1.5 compiler gives the error "attempting to
use incompatible return type".
This method is called in WorkerThreadPool, where it is
compared against WorkerThread.
WORKERTHREAD_BUSY and WorkerThread.