CTCI 9.7

Implement the "paint fill" function that one might see on many image editing programs. That is, Given a screen(represented by a two-dimensional 
array of colors), a point, and a new color, fill in the surrounding area until the color changes from the original color.

CTCI 9.7.java

enum Color{
    Black, White, Red, Yellow, Creen
}

public static void paint(int[][] screen, int x, int y, Color originalColor, Color updatedColor){
    if(x < 0 || y < 0 || x >= screen[0].length || y >= screen.length) return;
    if(screen[x][y] == originalColor){
        screen[x][y] = updatedColor;
        paint(screen, x + 1, y, originalColor, updatedColor);
        paint(screen, x - 1, y, originalColor, updatedColor);
        paint(screen, x, y - 1, originalColor, updatedColor);
        paint(screen, x, y + 1, originalColor, updatedColor);
    }
}