Java color recognition

I happen to have a map, and it has 24 colors in it - I want to store the pixels having different colors (I know the RGB values) - how to do it? Can do it with another prog. language if it is impossible, and then import it somehow to java.

So is it possible, if so - how ?

>>13
The map has pixels. I want to store each pixel according to its color, which are different from each other.

This is what's wrong with the world today: people can't make even the simplest deductions.