sRGB到RGB颜色转换

Question

I have sRGB numbers stored in file produced by Color.getRGB() method like this :

//example for RED color
int num = Color.RED.getRGB(); // num is -65536 for RED
// save num to a file.

Now I have to read the values from that file and have to convert each number to [x,y,z] RGB format. From -65536 I need to get [255,51,51] .

Can anyone tell me how to do that in java?

Answer 1

Here it is

int num = Color.RED.getRGB();
int blue =  num & 255;
int green = (num >> 8) & 255;
int red =   (num >> 16) & 255;
System.out.println("R:"+red+"\n"+"G:"+green+"\n"+"B:"+blue);

Answer 2

Color color = new Color(-65536);
int r = color.getRed();
int g = color.getGreen();
int b = color.getBlue();

System.out.println(String.format("%d %d %d", r, g, b));  // 255 0 0

Answer 3

As mentionned in the documentation , there is method in the Color class to obtain this

getRed()
getGreen()
getBleu()