some hammering problems in java

some question , if you are a java programmer or java user .

1. why java provides minimum support to boolean variables .

2. why java supports only 255 dimensions in array .

3. why java supports only 255 parameters in a function .

4. why java uses 9999999 values as a diffrentiator in representing values in the form of E form and in normal form .      example :– 10000000 is represented like 1.0E7 and 9999999 represented normally 9999999.