119 lines
3.3 KiB
Java
119 lines
3.3 KiB
Java
package Maths;
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/**
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* Find the area of various geometric shapes
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*/
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public class Area {
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public static void main(String[] args) {
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/* test cube */
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assert Double.compare(surfaceAreaCube(1), 6.0) == 0;
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/* test sphere */
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assert Double.compare(surfaceAreaSphere(5), 314.1592653589793) == 0;
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assert Double.compare(surfaceAreaSphere(1), 12.566370614359172) == 0;
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/* test rectangle */
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assert Double.compare(surfaceAreaRectangle(10, 20), 200.0) == 0;
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/* test square */
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assert Double.compare(surfaceAreaSquare(10), 100.0) == 0;
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/* test triangle */
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assert Double.compare(surfaceAreaTriangle(10, 10), 50.0) == 0;
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/* test parallelogram */
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assert Double.compare(surfaceAreaParallelogram(10, 20), 200.0) == 0;
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/* test trapezium */
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assert Double.compare(surfaceAreaTrapezium(10, 20, 30), 450.0) == 0;
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/* test circle */
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assert Double.compare(surfaceAreaCircle(20), 1256.6370614359173) == 0;
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}
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/**
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* Calculate the surface area of a cube.
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*
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* @param sideLength side length of cube
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* @return surface area of given cube
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*/
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private static double surfaceAreaCube(double sideLength) {
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return 6 * sideLength * sideLength;
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}
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/**
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* Calculate the surface area of a sphere.
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*
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* @param radius radius of sphere
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* @return surface area of given sphere
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*/
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private static double surfaceAreaSphere(double radius) {
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return 4 * Math.PI * radius * radius;
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}
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/**
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* Calculate the area of a rectangle
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*
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* @param length length of rectangle
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* @param width width of rectangle
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* @return area of given rectangle
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*/
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private static double surfaceAreaRectangle(double length, double width) {
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return length * width;
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}
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/**
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* Calculate the area of a square
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*
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* @param sideLength side length of square
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* @return area of given square
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*/
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private static double surfaceAreaSquare(double sideLength) {
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return sideLength * sideLength;
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}
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/**
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* Calculate the area of a triangle
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*
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* @param base base of triangle
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* @param height height of triangle
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* @return area of given triangle
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*/
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private static double surfaceAreaTriangle(double base, double height) {
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return base * height / 2;
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}
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/**
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* Calculate the area of a parallelogram
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*
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* @param base base of parallelogram
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* @param height height of parallelogram
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* @return area of given parallelogram
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*/
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private static double surfaceAreaParallelogram(double base, double height) {
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return base * height;
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}
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/**
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* Calculate the area of a trapezium
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*
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* @param base1 upper base of trapezium
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* @param base2 bottom base of trapezium
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* @param height height of trapezium
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* @return area of given trapezium
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*/
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private static double surfaceAreaTrapezium(double base1, double base2, double height) {
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return (base1 + base2) * height / 2;
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}
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/**
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* Calculate the area of a circle
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*
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* @param radius radius of circle
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* @return area of given circle
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*/
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private static double surfaceAreaCircle(double radius) {
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return Math.PI * radius * radius;
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}
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} |