find digit in number

[keizersoz]

Hi,

I need to find out in a certain digit appears in an int. (for instance the digit 2 appears in the int 582).

Does someone know some useful functions that can help me solve that problem. The only way I see to solve this is look at the length of the int and then by % getting all the digits. But it seems to me to complicated for such an easy assignment.

Any help is welcome. Thanks a lot.

Janssens

 

[stefanwagner]

You may convert number and digit to String, and use Stringfunctions.

Using module seems more elegant to me.

seeking a job as java-programmer in Berlin:

http://home.arcor.de/hirnstrom/bewerbung

 

[morne77]

first convert the int value to string, then use the equals method in the String class to compare your value to the string itself.

 

[Diancecht]

That would only work if the digit you're looking for is the same than the whole number.

I'd go stefan's way.

Btw, I'm curious about the module thingie. How would yo use it? Moduling 10, 100, 100, etc?

Cheers,
Dian

 

[stefanwagner]

public boolean isDigitInInt (int digit, int value)
{
        while (value > 0)
        {
                if ((value % 10) == digit) return true; 
                value /= 10; 
        }
        return false;
}

a bit more work is to do, if value might be negativ.


seeking a job as java-programmer in Berlin:

http://home.arcor.de/hirnstrom/bewerbung

 

[Diancecht]

Nice way.

Cheers,
Dian