Question: is this part really correct?

[AndroidDeveloperLB]

This seems weird:

    private static float[] getFloats(String s) {
        if (s.charAt(0) == 'z' | s.charAt(0) == 'Z') {
            return new float[0];
        }

I think you meant to use "||" and not a single one... Where did you get this code from? Maybe it should get updated... Not even sure what this means with a single one...