Generating random number within size of map problem (why me!!) ?

Hi Guys,
I'm trying to generator random numbers between 0 and a map width and another random number between 0 and a map height i.e if the map width was 3 i can generator 0,1,2.
The coding i am using to do this is :
int randomCol;
int randomRow;
randomCol = newMapWidth - 0 + 1;
int itemp = generator.nextInt() % randomCol;
if (itemp < 0)
itemp = -itemp;
randomCol = 0 + itemp;
randomRow = newMapHeight - 0 + 1;
int jtemp = generator.nextInt() % randomRow;
if (jtemp < 0)
jtemp = -jtemp;
randomRow = 0 + jtemp;I've had a look at similar problems and searched penalty but can't seem to get it right for whatever way i implement. It leads to some array out of bound errors.
If any can help me resolve this problem it would be greatly appreciated.
Thanks A lot !

Hippolyte wrote:
randomRow = 0 + jtemp;I'll bite: what's the "0 + " voodoo for?It?s for clarity and Code readability, I guess. @OP: Random.nextFloat() generates numbers from 0.0f to 1.0f. Multiplying this number with your max value will generate a number between 0 and that given max value. BTW, you can generate numbers from -a to a by using (Random.nextFloat()- .5f) * (2 * a).
Shazaam.

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