if (minimum > value || value > (value + extent) || (value + extent) > maximum) { throw new IllegalArgumentException("Invalid extent property set"); }   this.extent = extent;   fireStateChanged();  }
if (extent != this.extent) { this.extent = extent; fireStateChanged(); } }
	public void setExtent(int extent) {		// Validate Constraints		if (minimum > value || value > (value + extent) ||			(value + extent) > maximum) {			throw new IllegalArgumentException("Invalid extent property set");		} // if				// Set Extent		this.extent = extent;				// Notification		fireStateChanged();	} // setExtent()