How to convert hexadecimal to decimal /integer ?

[Kavita Kale]

Hi...
my question is too basic...
but i am confused...
just tell me
How to convert hexadecimal to decimal /integer ?
means ...
oX7fffffff = 2147483647
how can i calculate this ?

this topic is from first chapter of kathy's book ...
[ January 04, 2007: Message edited by: Kavita Kale ]

[Joe Harry]

If you have Khalid Mughals book for 1.4, you have a dedicated topic as an Appendix. You can easily google out your querry and you'll find numerous links explaining this.

[Sanjeev Singh]

Make a Integer object like
Integer ii = new Integer(oX7fffffff);
//get the int value.
System.out.prinltn(ii.intValue());

[Javier Sanchez Cerrillo]

Actually is not necessary to use a wrapper class like Integer.

You can just use:

int a = 0xA;

System.out.println(a);

-----------------------------

The most important thing to remember maybe is you are not converting the data. You are just seeing it from a different point of view.

Internally the PC sees your data as binary. But it is still the same.

[Tommaso Nuccio]

Hi,

doing it manually will help you more to understand.
It basically works like binary, except the base is 16.

For example:
0xbad
b*16^2 + a*16^1 + d*16^0
= 11*256 + 10*16 + 13*1
= 2816 + 160 + 13
= 2989

[Kavita Kale]

Thank you Tommaso...
its very helpful to me....
now i am feeling i am perfect in this topic.

[fred rosenberger]

It basically works like binary, except the base is 16.

True - but don't forget about the sign bit...

[Bert Bates]

And remember, this is only important for the 1.4 exam - it's NOT on the 5.0 exam

[fred rosenberger]

Originally posted by Bert Bates:
And remember, this is only important for the 1.4 exam - it's NOT on the 5.0 exam

You took this off the 1.5 exam??? ppffff!!! These kids today don't have to learn ANYTHING, do they?