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mgrzybek05mgrzybek05
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Added surface area calculation for pyramid
1 parent d5289b9 commit 0f4e578

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-188
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  • src/main/java/com/thealgorithms/maths

1 file changed

+207
-188
lines changed

‎src/main/java/com/thealgorithms/maths/Area.java‎

Lines changed: 207 additions & 188 deletions
Original file line numberDiff line numberDiff line change
@@ -4,192 +4,211 @@
44
* Find the area of various geometric shapes
55
*/
66
public final class Area {
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private Area() {
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}
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/**
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* String of IllegalArgumentException for radius
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*/
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private static final String POSITIVE_RADIUS = "Must be a positive radius";
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/**
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* String of IllegalArgumentException for height
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*/
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private static final String POSITIVE_HEIGHT = "Must be a positive height";
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/**
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* String of IllegalArgumentException for base
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*/
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private static final String POSITIVE_BASE = "Must be a positive base";
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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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*/
31-
public static double surfaceAreaCube(final double sideLength) {
32-
if (sideLength <= 0) {
33-
throw new IllegalArgumentException("Must be a positive sideLength");
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}
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return 6 * sideLength * sideLength;
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}
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/**
39-
* 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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*/
44-
public static double surfaceAreaSphere(final double radius) {
45-
if (radius <= 0) {
46-
throw new IllegalArgumentException(POSITIVE_RADIUS);
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}
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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 a rectangle
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* @param width width of a rectangle
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* @return area of given rectangle
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*/
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public static double surfaceAreaRectangle(final double length, final double width) {
59-
if (length <= 0) {
60-
throw new IllegalArgumentException("Must be a positive length");
61-
}
62-
if (width <= 0) {
63-
throw new IllegalArgumentException("Must be a positive width");
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}
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return length * width;
66-
}
67-
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/**
69-
* Calculate surface area of a cylinder.
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*
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* @param radius radius of the floor
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* @param height height of the cylinder.
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* @return volume of given cylinder
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*/
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public static double surfaceAreaCylinder(final double radius, final double height) {
76-
if (radius <= 0) {
77-
throw new IllegalArgumentException(POSITIVE_RADIUS);
78-
}
79-
if (height <= 0) {
80-
throw new IllegalArgumentException(POSITIVE_RADIUS);
81-
}
82-
return 2 * (Math.PI * radius * radius + Math.PI * radius * height);
83-
}
84-
85-
/**
86-
* 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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*/
91-
public static double surfaceAreaSquare(final double sideLength) {
92-
if (sideLength <= 0) {
93-
throw new IllegalArgumentException("Must be a positive sideLength");
94-
}
95-
return sideLength * sideLength;
96-
}
97-
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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
104-
*/
105-
public static double surfaceAreaTriangle(final double base, final double height) {
106-
if (base <= 0) {
107-
throw new IllegalArgumentException(POSITIVE_BASE);
108-
}
109-
if (height <= 0) {
110-
throw new IllegalArgumentException(POSITIVE_HEIGHT);
111-
}
112-
return base * height / 2;
113-
}
114-
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/**
116-
* Calculate the area of a parallelogram.
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*
118-
* @param base base of a parallelogram
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* @param height height of a parallelogram
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* @return area of given parallelogram
121-
*/
122-
public static double surfaceAreaParallelogram(final double base, final double height) {
123-
if (base <= 0) {
124-
throw new IllegalArgumentException(POSITIVE_BASE);
125-
}
126-
if (height <= 0) {
127-
throw new IllegalArgumentException(POSITIVE_HEIGHT);
128-
}
129-
return base * height;
130-
}
131-
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/**
133-
* Calculate the area of a trapezium.
134-
*
135-
* @param base1 upper base of trapezium
136-
* @param base2 bottom base of trapezium
137-
* @param height height of trapezium
138-
* @return area of given trapezium
139-
*/
140-
public static double surfaceAreaTrapezium(final double base1, final double base2, final double height) {
141-
if (base1 <= 0) {
142-
throw new IllegalArgumentException(POSITIVE_BASE + 1);
143-
}
144-
if (base2 <= 0) {
145-
throw new IllegalArgumentException(POSITIVE_BASE + 2);
146-
}
147-
if (height <= 0) {
148-
throw new IllegalArgumentException(POSITIVE_HEIGHT);
149-
}
150-
return (base1 + base2) * height / 2;
151-
}
152-
153-
/**
154-
* Calculate the area of a circle.
155-
*
156-
* @param radius radius of circle
157-
* @return area of given circle
158-
*/
159-
public static double surfaceAreaCircle(final double radius) {
160-
if (radius <= 0) {
161-
throw new IllegalArgumentException(POSITIVE_RADIUS);
162-
}
163-
return Math.PI * radius * radius;
164-
}
165-
166-
/**
167-
* Calculate the surface area of a hemisphere.
168-
*
169-
* @param radius radius of hemisphere
170-
* @return surface area of given hemisphere
171-
*/
172-
public static double surfaceAreaHemisphere(final double radius) {
173-
if (radius <= 0) {
174-
throw new IllegalArgumentException(POSITIVE_RADIUS);
175-
}
176-
return 3 * Math.PI * radius * radius;
177-
}
178-
179-
/**
180-
* Calculate the surface area of a cone.
181-
*
182-
* @param radius radius of cone.
183-
* @param height of cone.
184-
* @return surface area of given cone.
185-
*/
186-
public static double surfaceAreaCone(final double radius, final double height) {
187-
if (radius <= 0) {
188-
throw new IllegalArgumentException(POSITIVE_RADIUS);
189-
}
190-
if (height <= 0) {
191-
throw new IllegalArgumentException(POSITIVE_HEIGHT);
192-
}
193-
return Math.PI * radius * (radius + Math.pow(height * height + radius * radius, 0.5));
194-
}
7+
private Area() {
8+
}
9+
10+
/**
11+
* String of IllegalArgumentException for radius
12+
*/
13+
private static final String POSITIVE_RADIUS = "Must be a positive radius";
14+
15+
/**
16+
* String of IllegalArgumentException for height
17+
*/
18+
private static final String POSITIVE_HEIGHT = "Must be a positive height";
19+
20+
/**
21+
* String of IllegalArgumentException for base
22+
*/
23+
private static final String POSITIVE_BASE = "Must be a positive base";
24+
25+
/**
26+
* Calculate the surface area of a cube.
27+
*
28+
* @param sideLength side length of cube
29+
* @return surface area of given cube
30+
*/
31+
public static double surfaceAreaCube(final double sideLength) {
32+
if (sideLength <= 0) {
33+
throw new IllegalArgumentException("Must be a positive sideLength");
34+
}
35+
return 6 * sideLength * sideLength;
36+
}
37+
38+
/**
39+
* Calculate the surface area of a sphere.
40+
*
41+
* @param radius radius of sphere
42+
* @return surface area of given sphere
43+
*/
44+
public static double surfaceAreaSphere(final double radius) {
45+
if (radius <= 0) {
46+
throw new IllegalArgumentException(POSITIVE_RADIUS);
47+
}
48+
return 4 * Math.PI * radius * radius;
49+
}
50+
51+
/**
52+
* Calculate the area of a rectangle.
53+
*
54+
* @param length length of a rectangle
55+
* @param width width of a rectangle
56+
* @return area of given rectangle
57+
*/
58+
public static double surfaceAreaRectangle(final double length, final double width) {
59+
if (length <= 0) {
60+
throw new IllegalArgumentException("Must be a positive length");
61+
}
62+
if (width <= 0) {
63+
throw new IllegalArgumentException("Must be a positive width");
64+
}
65+
return length * width;
66+
}
67+
68+
/**
69+
* Calculate surface area of a cylinder.
70+
*
71+
* @param radius radius of the floor
72+
* @param height height of the cylinder.
73+
* @return volume of given cylinder
74+
*/
75+
public static double surfaceAreaCylinder(final double radius, final double height) {
76+
if (radius <= 0) {
77+
throw new IllegalArgumentException(POSITIVE_RADIUS);
78+
}
79+
if (height <= 0) {
80+
throw new IllegalArgumentException(POSITIVE_RADIUS);
81+
}
82+
return 2 * (Math.PI * radius * radius + Math.PI * radius * height);
83+
}
84+
85+
/**
86+
* Calculate the area of a square.
87+
*
88+
* @param sideLength side length of square
89+
* @return area of given square
90+
*/
91+
public static double surfaceAreaSquare(final double sideLength) {
92+
if (sideLength <= 0) {
93+
throw new IllegalArgumentException("Must be a positive sideLength");
94+
}
95+
return sideLength * sideLength;
96+
}
97+
98+
/**
99+
* Calculate the area of a triangle.
100+
*
101+
* @param base base of triangle
102+
* @param height height of triangle
103+
* @return area of given triangle
104+
*/
105+
public static double surfaceAreaTriangle(final double base, final double height) {
106+
if (base <= 0) {
107+
throw new IllegalArgumentException(POSITIVE_BASE);
108+
}
109+
if (height <= 0) {
110+
throw new IllegalArgumentException(POSITIVE_HEIGHT);
111+
}
112+
return base * height / 2;
113+
}
114+
115+
/**
116+
* Calculate the area of a parallelogram.
117+
*
118+
* @param base base of a parallelogram
119+
* @param height height of a parallelogram
120+
* @return area of given parallelogram
121+
*/
122+
public static double surfaceAreaParallelogram(final double base, final double height) {
123+
if (base <= 0) {
124+
throw new IllegalArgumentException(POSITIVE_BASE);
125+
}
126+
if (height <= 0) {
127+
throw new IllegalArgumentException(POSITIVE_HEIGHT);
128+
}
129+
return base * height;
130+
}
131+
132+
/**
133+
* Calculate the area of a trapezium.
134+
*
135+
* @param base1 upper base of trapezium
136+
* @param base2 bottom base of trapezium
137+
* @param height height of trapezium
138+
* @return area of given trapezium
139+
*/
140+
public static double surfaceAreaTrapezium(final double base1, final double base2, final double height) {
141+
if (base1 <= 0) {
142+
throw new IllegalArgumentException(POSITIVE_BASE + 1);
143+
}
144+
if (base2 <= 0) {
145+
throw new IllegalArgumentException(POSITIVE_BASE + 2);
146+
}
147+
if (height <= 0) {
148+
throw new IllegalArgumentException(POSITIVE_HEIGHT);
149+
}
150+
return (base1 + base2) * height / 2;
151+
}
152+
153+
/**
154+
* Calculate the area of a circle.
155+
*
156+
* @param radius radius of circle
157+
* @return area of given circle
158+
*/
159+
public static double surfaceAreaCircle(final double radius) {
160+
if (radius <= 0) {
161+
throw new IllegalArgumentException(POSITIVE_RADIUS);
162+
}
163+
return Math.PI * radius * radius;
164+
}
165+
166+
/**
167+
* Calculate the surface area of a hemisphere.
168+
*
169+
* @param radius radius of hemisphere
170+
* @return surface area of given hemisphere
171+
*/
172+
public static double surfaceAreaHemisphere(final double radius) {
173+
if (radius <= 0) {
174+
throw new IllegalArgumentException(POSITIVE_RADIUS);
175+
}
176+
return 3 * Math.PI * radius * radius;
177+
}
178+
179+
/**
180+
* Calculate the surface area of a cone.
181+
*
182+
* @param radius radius of cone.
183+
* @param height of cone.
184+
* @return surface area of given cone.
185+
*/
186+
public static double surfaceAreaCone(final double radius, final double height) {
187+
if (radius <= 0) {
188+
throw new IllegalArgumentException(POSITIVE_RADIUS);
189+
}
190+
if (height <= 0) {
191+
throw new IllegalArgumentException(POSITIVE_HEIGHT);
192+
}
193+
return Math.PI * radius * (radius + Math.pow(height * height + radius * radius, 0.5));
194+
}
195+
196+
/**
197+
* Calculate the surface area of a pyramid with a square base.
198+
*
199+
* @param sideLength side length of the square base
200+
* @param slantHeight slant height of the pyramid
201+
* @return surface area of the given pyramid
202+
*/
203+
public static double surfaceAreaPyramid(final double sideLength, final double slantHeight) {
204+
if (sideLength <= 0) {
205+
throw new IllegalArgumentException("Must be a positive sideLength");
206+
}
207+
if (slantHeight <= 0) {
208+
throw new IllegalArgumentException("Must be a positive slantHeight");
209+
}
210+
double baseArea = sideLength * sideLength;
211+
double lateralSurfaceArea = 2 * sideLength * slantHeight;
212+
return baseArea + lateralSurfaceArea;
213+
}
195214
}

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