public class Buffer<T> {
	private T data;
	private boolean inUse;
	
	public Buffer() {
		inUse=false;
	}
	
	public boolean isEmpty() {
		return (inUse == false);
	}
	
	public boolean isFull() {
		return (inUse == true);
	}
	
	public T fetch() {
		if (isFull()) {
			inUse = false;
			return data;
		}
		else {
			return null;
		}
	}
	
	public boolean store(T item) {
		if (! isFull()) {
			inUse=true;
			data=item;
			return true;
		}
		else {
			return false;
		}
	}
}