🚀 go-pugleaf

Rusli Usman <mrusli67@cbn.net.id> wrote:

> I understand java's Floating-Point data type consists of float (32-bits)
> and double (64-bits).  If I want to find out the range of a type, for
> example, byte which has a maximum value of 127, all I have to do is as
> follows:
> 
> byte bValue = 127;
> 
> System.out.println("Min of Byte: "+ ++bValue);
> 
> The output gives me:
> 
> Min of Byte:-128
> 
> So, how do I do that with floating-point?  If I do ezactly like the byte
> data type, I don't see the min value.  I know the min and max value of
> float, but how do I prove it in the code?

While I believe that any correct JVM must behave as you describe, 
I have found that it is seldom (if ever) a good idea to employ 
tricks like the one you describe.

Instead, you should use the MIN_VALUE and MAX_VALUE static 
members that are defined in most of the wrapper classes that Java 
defines (Byte, Character, Double, Float, Integer, Long, Short).  

So to get the minimum value for a float, use Float.MIN_VALUE.

-- 
Regards,

John P. McGrath
<mcgrath@enter.net>
<jpm@nscs.fast.net>