" this command (getPixelColor) returns a color so the information should be in the form of an RGB value, correct? "
Not bad. Close, but no cigar...
I suppose you come from Robot page. Then you saw it returns a Color, not a color. The capital is... capital here! Java is a case sensitive language, so Color != color. The former is a java.awt class, from stock Java. You can click on the link on Color work to see how to use it. The latter is a keyword specific to Processing, and is indeed an int (and not 3 ints!).

Ok. Great. Thanks, phi.lho. At least I am not insane! : ) I'll take a look at that and see if I can get it to work.

Thanks again!

So, the sketch compiles but still does not work. I know it is because I don't have the Color int set up properly (in this case, not at all). Everything I try leads to a "cannot convert int to Color" message. I read the java AWT page on Color but I'm still confused as to how to make it work. It says that Color returns (r,g,b) but that it is just an int and not an array. I'm not sure what to do with this.

I feel like I am close, but I still haven't figured it out. Here is the code so far:

Robot PixelBot;
Color pixelColor;

void setup() {
 
  size (300,300);
 
  try
  {
    PixelBot = new Robot();
    //pixelColor = new Color();    <--this throws errors. I'm probably wrong to include it anyway.
  }
   catch (AWTException e)
  {
    println("Robot class not supported");
    exit();
  }
}
 
  void draw() {
   
 pixelColor = PixelBot.getPixelColor(100,100); 
 rect(100,100,100,100);
 
  }
  if pixelColor == (255,0,0){
    fill(255,0,0);
  }else if pixelColor == (255,69,0) {
    fill(255,69,0);
  }else if pixelColor == (255,165,0) {
    fill(255,165,0);
  }else {
    fill(100);
  }
 
  updatePixels;
 
  }


I'm sure I'm handling Color wrong and I'm stumped on how to set up the int (pixelColor). Any suggestions?

Thanks in advance!
   

if pixelColor == (255,0,0){ is wrong in lot of ways, that's not Java code...
You have to put the expression of a if between parentheses. (255,0,0) has no meaning at all.
pixelColor is an object, you have to use its methods to use it: get the R, G, B values with pixelColor.getRed(), pixelColor.getGreen() and pixelColor.getBlue()

Also updatePixels; is wrong too (should have empty parentheses after it) and has no use in this context...

Great. Thanks phi.lho. This helps a ton. I think I was just confusing myself with the java Classes and the solution is probably much simpler than I had constructed in my head. : )

You are a life/sanity saver!

Ok. Got it working now, thanks to phi.lho's info. I am indeed new at this. : )

Here is the code if anyone needs it for some reason. I will be using it for a hack in order for the Unreal Development Kit to talk to Arduino.

Thanks again. This forum is invaluable.

Robot PixelBot;      //Robot class
Color pixelColor;    //Color class
int pixelColor_r;
int pixelColor_g;
int pixelColor_b;


void setup() {

 size (300,300);
 background(0);

 try
 {
   PixelBot = new Robot();        
   pixelColor = new Color(0,0,0); 
 }
  catch (AWTException e)
 {
   println("Robot class not supported");
   exit();
 }
}

void draw() {

 pixelColor = PixelBot.getPixelColor(100,100);  //Reads what color pixel is on digital
 pixelColor_r = pixelColor.getRed();                  //display at 100,100 coordinate.
 pixelColor_g = pixelColor.getGreen();
 pixelColor_b = pixelColor.getBlue();
 rect(100,100,100,100);

//The following section fills a small box according to which pixel colors are returned.
//You can test this by creating a small bmp that has the three rgb values and drag it
//across the 100,100 mark on your monitor. The colors should change and coincide with
//whichever color pixel is currently being displayed. It's not perfect but it works well enough for my purposes.

 if (pixelColor_r == 255 && pixelColor_g == 0 && pixelColor_b == 0) {
   fill(255,0,0);
 }else if(pixelColor_r == 255 && pixelColor_g == 69 && pixelColor_b == 0) {
   fill(255,69,0);
 }else if(pixelColor_r == 255 && pixelColor_g == 165 && pixelColor_b == 0) {
   fill(255,165,0);
 }else {
   fill(100);
 }
}