Ore Generation Minecraft

public void generateSurface(World world, java.util.Random rand, int chunkX, int chunkZ)
{
    for(int i = 0; i < /**FreqOnChunks**/; i++)
    {
        int randPosX = chunkX + rand.nextInt(16);
        int randPosY = rand.nextInt(/**TopHeight**/)+/**BottomHeight**/;
        int randPosZ = chunkZ + rand.nextInt(16);
        (new WorldGenMinable(mod_Name.oreName.blockID, /**FreqOnSpecificChunk**/)).generate(world, rand, randPosX, randPosY, randPosZ);
    }
}