A code example

Question

Hi,
I'm quite new at Java (and at programming on the whole). Can someone explain this to me (saw it in an code example on the internet):
final private char PI_NAME = 0xFF01;
/M

Answer 1

Hi,
a char is a variable that is supposed to contain a
character. However, not all characters exist on the
keyboard, so you define them using their hex value.
final private char PI_NAME = 0xFF01;final = no one can change it
private = no one can see it
char = see above
PI_NAME = the name of the variable
0xFF01 = the value of the variable in hexadecimal
Generally, in Java you can define any number using
octal, decimal or hexadecimal numbers
Octals (based on the number 8, which means it has
digits from 0 to 7) ALWAYS start with a leading 0,
decimals are entered as you know them (for example
17) and hexadecimal numbers are entered with a
leading 0x.
So in this case 0x means "hexadecimal number ahead",
FF01 is its value.
To know its value in decimal, do the following:
1 x 1 (value of last digit)
0 x 16 (value of second from last)
15 x 16 x 16 (F in hex represents the decimal 15)
15 x 16 x 16
All in all, this results in the decimal number
65281.