Boundaries - Using Third-Party Code

[jnguyen095]

• If our application needs a Map of Sensors, you might find the sensors set up like this:
  java Map sensors = new HashMap();
• Then, when some other part of the code needs to access the sensor, you see this code:
  java Sensor s = (Sensor)sensors.get(sensorId );
• This works, but it’s not clean code. Also, this code does not tell its story as well as it
  could.
• The readability of this code can be greatly improved by using generics, as shown
  below:

Map<Sensor> sensors = new HashMap<Sensor>();
...
Sensor s = sensors.get(sensorId );```