Question

For java code: Create a library to do it all. The attached file has all the directions and methods that need to be included in your library (.jar). You will create a .jar file, and a tester app that will include your .jar file (Add External JAR).

The attached file below:

Create a java project called MyLibrary, a package called net.dtcc.lib, and a class called AllInOne. The class should have the following methods, each method should return the answer:
Area:
Area of Rectangle
Area of Square
Area of Triangle
Area of Circle
Area of Trapezoid
Area of Ellipse
Area of Pentagon
Area of Parallelogram
Area of Rhombus
Area of Hexagon
Area of Polygon
** Pass in appropriate variables

Fractions:
Adding 2 fractions
Subtracting 2 fractions
Multiplying 2 fractions
Dividing 2 fractions
** Pass in numerator/denominator of first number; numerator/denominator of second number

Binary:
Binary to decimal conversion  
** Pass in binary number

Temperature:
Celcius to Fahrenheit
Celcius to Kelvin
Fahrenheit to Celcius
Fahrenheit to Kelvin
** Pass in temperature to be converted 

Volume:
Volume of Cube
Volume of Box
Volume of Cylinder
Volume of Cone
Volume of Sphere
** Pass in appropriate variables

Perimeter:
Perimter of Square
Perimeter of Rectangle
** Pass in appropriate variables

Circumference:
Circumference of Circle
** Pass in appropriate variables

Pythagorus Theorem:
** Pass in 2 values (a,b)

Once you have finished the class, create a library (.jar) file with the name Taz2015.jar

Next create another java project called Tester, a package called .net.dtcc.tester, and a class called LibTester. You will need to import your Taz2015.jar to the project (hint: remember derby.jar?). In this class, you should test each method in the library.

Answer 1

Steps to do the assignment.

1. Create a java project called MyLibrary.
2. Create package called net.dtcc.lib.
3. Inside the newly created package create a new class called AllInOne.
4. Copy paste the source code given in AllInOne.
5. Right-click on the Project name
6. Select Properties
7. Click Packaging
8. Check Build JAR after Compiling
9. Check Compress JAR File
10. Click OK to accept changes
11. Right-click on a Project name
12. Select Build or Clean and Build
13. Jar would be created inside MyLibrary\dist
14. create another java project called Tester
15. Create a package called net.dtcc.tester, and a class called LibTester
16. For adding the previously created jar, right click project(Tester), select properties
17. Select libraries and then click on add/jar folder. Browse the jar previously created and click ok.
18. Create a main method in LibTester and use the methods we defined in AllInOne.

Source code

1. AllInOne .java

public class AllInOne {

public double areaOfRectangle(double l, double b) {
return l * b;
}

public double areaOfSquare(double a) {
return a * a;
}

public double areaOfTriangle(double base, double height) {
return (base * height) / 2;
}

public double areaOfCircle(double r) {
return 3.14 * r * r;
}

public double areaOfTrapezoid(int b1,
int b2,
int h) {
return ((b1 + b2) / 2) * h;
}

public double areaOfEllipse(float a, float b) {

return (float) 3.142 * a * b;

}

public double areaOfPentagon(double a) {

return (double)(Math.sqrt(5 * (5 + 2 *
(Math.sqrt(5)))) * a * a) / 4;
}

public double areaOfParallelogram(double base, double height) {
return base * height;
}

public double areaOfRhombus(double l1, double l2) {
return (double)(l1 * l2) / 2;
}

public double areaOfHexagon(double s) {
return ((3 * Math.sqrt(3) *
(s * s)) / 2);
}

public double areaOfPolygon(double X[], double Y[],
int n) {
double area = 0.0;
int j = n - 1;
for (int i = 0; i < n; i++) {
area += (X[j] + X[i]) * (Y[j] - Y[i]);
j = i;
}
return Math.abs(area / 2.0);
}

private int gcd(int a, int b) {
if (a == 0) {
return b;
}
return gcd(b % a, a);
}

// Function to convert the obtained fraction
// into it's simplest form
private void lowest(int den3, int num3) {
// Finding gcd of both terms
int common_factor = gcd(num3, den3);

// Converting both terms into simpler
// terms by dividing them by common factor
den3 = den3 / common_factor;
num3 = num3 / common_factor;
System.out.println(num3 + "/" + den3);
}

//Function to add two fractions
public void addFraction(int num1, int den1,
int num2, int den2) {
// Finding gcd of den1 and den2
int den3 = gcd(den1, den2);

// Denominator of final fraction obtained
// finding LCM of den1 and den2
// LCM * GCD = a * b
den3 = (den1 * den2) / den3;

// Changing the fractions to have same denominator
// Numerator of the final fraction obtained
int num3 = (num1) * (den3 / den1) + (num2) * (den3 / den2);

// Calling function to convert final fraction
// into it's simplest form
lowest(den3, num3);
}

public void substractFraction(int num1, int den1,
int num2, int den2) {
addFraction(num1, den1, -1 * num2, den2);
}

public void multiplyFraction(int num1, int den1,
int num2, int den2) {
int num = num1 * num2;
int den = den1 * den2;
System.out.println(num + "/" + den);
}

public void divideFraction(int num1, int den1,
int num2, int den2) {
int num = num1 * den2;
int den = den1 * num2;
System.out.println(num + "/" + den);
}

public int binaryToDecimal(int n) {
int num = n;
int dec_value = 0;

// Initializing base
// value to 1, i.e 2^0
int base = 1;

int temp = num;
while (temp > 0) {
int last_digit = temp % 10;
temp = temp / 10;

dec_value += last_digit * base;

base = base * 2;
}

return dec_value;
}

public double celciusToFahrenheit(double c) {
return (double) c * (9 d / 5) + 32;
}

public double fahrenheitToCelcius(double fah) {
return (double)((fah - 32) * 5) / 9;
}

public double fahrenheitToKelvindouble(double fah) {
return 273.5 d + ((fah - 32.0 d) * (5.0 f / 9.0 d));
}

public double celciusToKelvin(double c) {
return (float)(c + 273.15);
}

public double volumeOfSquare(double a) {
return a * a * a;
}

public double volumeOfBox(double l, double b, double h) {
return l * b * h;
}

public double volumeOfCylinder(double height, double radius) {
return 3.14 * (radius * radius) * height;
}

public double volumeOfCone(double height, double radius) {
return 3.14 * (radius * radius) * height / 3;
}

public double volumeOfSphere(double r) {
return (4 * 22 * r * r * r) / (3 * 7);
}

public double perimeterOfSquare(double a) {
return 4 * a;
}

public double perimeterOfSquare(double a, double b) {
return 2 * (a + b);
}

public double circumferenceOfCircle(double r) {
return 2 * 3.14 * r;
}

public double pythagorusTheorem(double a, double b) {
double c = (a * a) + (b * b);
return Math.sqrt(c);
}

}

2. LibTester.java

public class LibTester {
public static void main(String[] args) {
AllInOne allInOne = new AllInOne();
double triangleArea = allInOne.areaOfTriangle(3.4, 9.5);
System.out.println(triangleArea);
}
}

Sample output: