Calculates the area of a circle. - Java java.lang

Java examples for java.lang:Math Geometry Shape

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Description

Calculates the area of a circle.

Demo Code

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//package com.java2s;

public class Main {
    /**
     * Calculates the area of a circle.
     *
     * @param radius a double value indicating the radius of the circle.
     * @return the area of a circle given the radius.
     * @see #ellipseArea(double, double)
     */
    public static double circleArea(final double radius) {
        return ellipseArea(radius, radius);
    }

    /**
     * Calculates the area of an ellipse.
     *
     * @param radiusLength a double value indicating the radius length of the ellipse (x axis).
     * @param radiusHeight a double value indicating the radius height of the ellipse (y axis).
     * @return the area of an ellipse given the radius length and height.
     * @see java.lang.Math#PI
     */
    public static double ellipseArea(final double radiusLength,
            final double radiusHeight) {
        return (Math.PI * radiusLength * radiusHeight);
    }
}

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