class Range implements Runnable {
	
	int low, high;
	IteratorHelper<Integer> ih = new IteratorHelper<Integer>(this);
	
	public Range (int low, int high) {
		this.low = low;
		this.high = high;
		//Start the thread to yield values
		ih.start();
	}
	public boolean hasNext() {
		//Check if doneflag has not been set in the IteratorHelper 
		return !(ih.done());
	}
	public int next() {
		//Get the next value from IteratorHelper
		return ih.get();
	}
	public void run () {
		for (int i = low; i<high; i++) {
			//Yield one value at a time
				ih.yield(i);
		}
		//Set the doneflag to true to signal hasNext() method
		ih.setDone();
	}
}