Serial communication (Java <-> Arduino)

In this part of the lab, we will use the serial bus to communicate between the Arduino and another process running on the host machine, written in java. 

You may wish to refer to this sparkfun page for an overview of serial communication.

There are 3 parts to the lab, which you should complete in the following order:

1. Java -> Arduino

2. Arduino -> Java

3. Java <-> Arduino

If you finish all 3 parts:

1. Use what you've learned to create a program that interacts with the environment. One idea is to make a Java GUI that changes color based on ambient light values.