6.13. (Optional) GUI and Graphics Case Study: Colors and Filled Shapes
Although you can create many interesting designs with just lines and basic shapes, class Graphics provides many more capabilities. The next two features we introduce are colors and filled shapes. Adding color brings another dimension to the drawings a user sees on the computer screen. Filled shapes fill entire regions with solid colors, rather than just drawing outlines.
Colors displayed on computer screens are defined by their red, green, and blue components. These components, called RGB values, have integer values from 0 to 255. The higher the value of a particular component, the richer the particular shade will be in the final color. Java uses class Color in package
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