Check out example codes for "creating random color in java". It will help you in understanding the concepts better.

Code Example 1

Random rand = new Random();
    // Java 'Color' class takes 3 floats, from 0 to 1.
    float r = rand.nextFloat();
    float g = rand.nextFloat();
    float b = rand.nextFloat();
    Color randomColor = new Color(r, g, b);

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