convert pixel values into RGB format

Question

I a have the red, green and blue values of a pixel seperately. How to convert them into RBG format to create a new image? I basically need a reverse process for this:

int red = (rgb >> 16) & 0xFF;
int green = (rgb >> 8) & 0xFF;
int blue = rgb & 0xFF;

Answer 1

int rgb = ((r << 16) | ((g << 8) | b);

assuming it's RGB888. Make sure r,g and b are all in the 0-255 range

Answer 2

It's a great practice to use the java.awt.Color class instead.
It will make the things simpler and easier . In your case it would be:

Color myColor = new Color(red, green, blue); //Construct the color
myColor.getRGB(); //Get the RGB of the constructed color

Or the inverse:

Color myColor = new Color(rgb); //Construct the color with the RGB value
myColor.getRed(); //Get the separate components of the constructed color
myColor.getGreen();
myColor.getBlue();

For more info, consult the Javadocs .