Explanation:The logic to generate concentric circles was explained earlier. The difference here is that
hollow circles are drawn instead of filled circles.
14.13 WORKING WITH FONTS
A font represents a particular size and style of text. The same character will appear different in different
fonts. In Java, a font is characterized by a font name, a style and a size. To work with the fonts, Java provides
the Font class. The Font class represents fonts, which are used to render text in a visible way. The Font
class is defi ned by the package Java.awt. A font can have many faces, such as heavy, medium, ...
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