according to Robert Heller the Math class is final (so that it cannot be subclassed) and the constructor is private(so that it cannot have instance).
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The java. lang. Math class contains methods for performing basic numeric operations such as the elementary exponential, logarithm, square root, and trigonometric functions.
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Static import means that the fields and methods in a class can be used in the code without specifying their class if they are defined as public static. The Math class method sqrt() in the package java .
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