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Programmer Certification (SCJP/OCPJP)
Easy Way to remember Ranges of
Joined: Jul 18, 2005
Jul 18, 2005 03:43:00
...Primitive values - any good tips
(eg - byte 8 bits, short 16 bits etc....)
any good websites / refreshers to help with converting bin to hex and so on?
Joined: Feb 05, 2001
Jul 18, 2005 09:33:00
Well always remember that the signed primitives have one less positive value than negative.
5.0 you don't need to worry as much about this than say the 1.4 exam.
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Joined: Jul 14, 2005
Jul 18, 2005 12:19:00
Here is a formula to calculate the value range for primitive data types - byte to long.
Value Range = (-2^n-1) to (2^n-1)-1 where n is the size in bits.
So this is how it works.
Variable Type Size(in bits) Value
byte 8 (-2^7) - 2^7-1 (-128 to 127)
short 16 (-2^15) - 2^15-1(-32768 to 32767)
int 32 (-2^31) - 2^31-1
long 64 (-2^63) - 2^63-1
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I agree. Here's the link:
subject: Easy Way to remember Ranges of
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