convert hex to long

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Jeff - 20 Dec 2005 20:39 GMT

Hey

midp 2.0
J2ME Wireless Toolkit 2.2
JDK 5

Long id;
String arg1 = "0b"; //arg1 can also have values like "01", "0a" etc
id = Long.parseLong(arg1);

This converting isn't working with "0b" or "0a"... but I've read in the
documentation of jdk5 that this parseLong is overloaded:
public static long parseLong(String s, int radix), and I guess this is the
correct method to use, but I'm not sure what the second parameter (radix) of
this method is?

Jeff

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Gordon Beaton - 20 Dec 2005 21:06 GMT

> Long id;
> String arg1 = "0b"; //arg1 can also have values like "01", "0a" etc
[quoted text clipped - 5 lines]
> correct method to use, but I'm not sure what the second parameter (radix) of
> this method is?

"Radix" is another word for "base".

If your string contains a base 16 number, specify 16.

/gordon

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Oliver Wong - 21 Dec 2005 21:36 GMT

>> Long id;
>> String arg1 = "0b"; //arg1 can also have values like "01", "0a" etc
[quoted text clipped - 11 lines]
>
> If your string contains a base 16 number, specify 16.

And in case that wasn't explicit enough, hexadecimal is base 16. Octal
is base 8. Binary is base 2. Decimal is base 10. Etc.

So for the OP's problem, yes, you want to use 16.

- Oliver

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convert hex to long

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