public class IteratorHelper<T> {



T _v;

boolean _isValueSet = false;

Thread _t;


public IteratorHelper (Runnable r) 

{

_t = new Thread(r);

start();

}



public void start() 

{

_t.start();

}



public void yield(T v) 

{

_v=v;

_isValueSet = true;

Thread.yield();

}



public synchronized T get () 

{

if(!_isValueSet)

{

try {

wait();

} catch (InterruptedException e) {

e.printStackTrace();

}

}


_isValueSet = false;

notify();

return _v;

}



public boolean done()

{

return _isValueSet;

}



}