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How to convert hexadecimal to decimal /integer ?

 
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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 ]
 
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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.
 
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Make a Integer object like
Integer ii = new Integer(oX7fffffff);
//get the int value.
System.out.prinltn(ii.intValue());
 
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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.
 
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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
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Thank you Tommaso...
its very helpful to me....
now i am feeling i am perfect in this topic.
 
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It basically works like binary, except the base is 16.


True - but don't forget about the sign bit...
 
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And remember, this is only important for the 1.4 exam - it's NOT on the 5.0 exam
 
fred rosenberger
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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?

 
Don't get me started about those stupid light bulbs.
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