Using color class

[colinbell]

I am trying to call the getRed() method on an image like so: image.getRed(); this is the same way i used getRGB and getWidth etc however this causes a cannot find symbol error. This probably sounds very simple and im sure it is however i do not understand this (brain not working).

[ProgramThis]

You can always just get the RGB and shift the data and pull out the red component:

int rgb = image.getRGB(x, y);
int red = ((rgb >> 16) & 0xff);

You can then manipulate the red componant as desired. I'll leave putting the red back in to see if you can get it. If you get stuck, ask.

[dlorde]

In general, it's better to use the classes provided than to manipulate and convert values 'manually' - there's less room for error and confusion: Color color = new Color(image.getRGB(x, y));
int red = color.getRed();Out of clutter, find simplicity. From discord, find harmony. In the middle of difficulty, lies opportunity...
A. Einstein

[colinbell]

Thats exactly what i needed thank you. Just to make sure i understand what is happening is the value returned the intensity of the red part of the pixel. How do the value relate to the getGreen and getBlue parts.

[dlorde]

See java.awt.Color (http://java.sun.com/j2se/1.5.0/docs/api/java/awt/Color.html).

It is not knowledge, but the act of learning, not possession, but the act of getting there which generates the greatest satisfaction...
F. Gauss