RFR (S) 8136500: Integer/Long getChars and stringSize should be more idiomatic

[Ulf]

Am 24.11.2015 um 17:50 schrieb Ulf:
> ... and better use char/short[] to save footprint and the compiler calculating the table offset 
> with charPos<<1.
Note additionally: In this case the raw table length will be = 200, so compiler can use cheap 
byte-wide addressing mode opcodes.

-Ulf