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The final keyword in Java is used to declare constants. Its effect is to render the affected variable immutable. Attempting to change the value of a final-qualified variable results in a compile-time error. As constants cannot be changed, it is desirable to define only one instance of them for the class; therefore consequently constants should be declared with the static modifier as well. (DCL31-J. Qualify mathematical constants with the static and final modifiers)
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The methods use the seemingly-random literals 12.56, 4.19, and 6.28 to represent various scaling factors used to calculate these dimensions. Someone reading this code would have no idea how they were generated or what they meant, and would therefore consequently be unable to understand the function of this code.
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