[Salik Syed]

First off, the way you learn arrays in java probably is at a much higher level (you probably learn about Vectors/ArrayLists and other top level containers)

For robots we are dealing with simple arrays,
So like I mentioned above all you need to do is simply calculate your PWM->Tilt Conversion table (in Excel or manually)

If you want to do it manually you could printf the TILT_ANGLE , then measure how far your robot is from the light.
Collect a few key data points (20-30) then interpolate between them.

Then just create an array which has each range value in it.