This week's book giveaway is in the OCPJP forum. We're giving away four copies of OCA/OCP Java SE 7 Programmer I & II Study Guide and have Kathy Sierra & Bert Bates on-line! See this thread for details.

The hex value of 0xbeef can be converted to decimal as follows:

f -> 15 * (16 to power of 0) = 15 * 1 = 15 e -> 14 * (16 to power of 1) = 14 * 16 = 224 e -> 14 * (16 to power of 2) = 14 * 256 = 3584 b -> 11 * (16 to power of 3) = 11 * 4096 = 45056

You should recognize that a numeric literal that begins with 0 is octal (base 8), and one that begins with 0x is hexadecimal (base 16). In hexadecimal, the letters a, b, c, d, e, and f are used to represent base-10 values 10, 11, 12, 13, 14, and 15 respectively.

(Note: The "x" can be either upper or lowercase -- just like an "L" to denote long, an "s" to denote short, or an "e" to denote exponent.)

"We're kind of on the level of crossword puzzle writers... And no one ever goes to them and gives them an award." ~Joe Strummer sscce.org

Netty poestel
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Joined: Sep 20, 2004
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Thanks Chris , Marc. final query on this topic, do these kind of 'otherwise calculator-calculations' [ powers of 16 multiplied and added with 2 digit numbers ] a regular feature in the exams ?