Question

The project requires you to implement 4 functions of your choice in a file called Utilities.java. The functions may relate to statistics, graphics/animation, audio, text, or image applications.

Deliverables (files that need to be submitted):

1. A word document that briefly describes the functions that were implemented and the API.

2. Utilities.java file with the 4 functions and a Test.java file that provides examples of using the functions in Utilities.java.

Answer 1

Test.Java Code

package test_package;

import java.io.Console;

import java.util.Scanner;

public class Test extends utilities {

public static void Find_Average_Function()

{utilities u = new utilities();

Scanner sc = new Scanner(System.in);

System.out.print("Enter the size of array ");

int a = sc.nextInt();

int [ ] number = new int [a]; // instantiate the array

int i;

int sum=0;

for ( i = 0; i < a; i++ ) // fill the array

number[ i ] = sc.nextInt();

float suma = u.find_average(number, a); // invoke the method

System.out.println("The average is" +suma + ".");

}

public static void Find_Sum_Function()

{utilities u = new utilities();

Scanner sc = new Scanner(System.in);

System.out.print("Enter the size of array ");

int a = sc.nextInt();

int [ ] number = new int [a]; // instantiate the array

int i;

int sum=0;

for ( i = 0; i < a; i++ ) // fill the array

number[ i ] = sc.nextInt();

float suma = u.find_sum(number, a); // invoke the method

System.out.println("The sum is" +suma + ".");

}

public static void Check_Pallindrome()

{

utilities u = new utilities();

System.out.println("Enter the String");

Scanner next = new Scanner(System.in);

String text = next.next();

if(u.isPalindrom(text))

{

System.out.print("It is Pallindrome");

}

else

{

System.out.print("It is not pallindrome");

}

}

public static void Number_Of_Vowels()

{

utilities u = new utilities();

System.out.println("Enter the String");

Scanner next = new Scanner(System.in);

String text = next.next();

System.out.println("The number of vowels are "+ u.Number_Of_Vowels(text));

}

public static void main(String[] args) {

// TODO Auto-generated method stub

Scanner input = new Scanner(System.in);

System.out.println("Enter the Choice of Function you want to Execute :");

System.out.println("1: Find Average Of Numbers");

System.out.println("2: Check if The String is Pallindrome or not");

System.out.println("3: Find Sum of Numbers");

System.out.println("4: Find The number of Vowels");

int choice = input.nextInt();

if(choice == 1)

{

Find_Average_Function();

}

else if(choice == 2)

{

Check_Pallindrome();

}

else if(choice == 3)

{

Find_Sum_Function();

}

else if(choice == 4)

{

Number_Of_Vowels();

}

  

  

}

}

Utilities.Java Code

package test_package;

public class utilities {

//Find Average of Numbers

public static float find_average(int [ ] numbers,int size) //method definition to find Average of numbers

{

float total = 0;

int i;

for(i=0; i< size; i++)

{

total = total + numbers[ i ];

}

  

return (total/size);

}

public static int find_sum(int [ ] numbers,int size) //method definition to find Sum of numbers

{

int total = 0;

int i;

for(i=0; i< size; i++)

{

total = total + numbers[ i ];

}

return (total);

}

//find if the String is pallindrome or not

public static Boolean isPalindrom(String text)

{

String reverse = "";

int length = text.length();

for ( int i = length - 1; i >= 0; i-- )

reverse = reverse + text.charAt(i);

if (text.equals(reverse))

return true;

else

return false;

}

public static int Number_Of_Vowels(String str)

{

int count = 0;

for (int i = 0; i < str.length(); i++)

{

if (str.charAt(i) == 'a' || str.charAt(i) == 'e' || str.charAt(i) == 'i'|| str.charAt(i) == 'o' || str.charAt(i) == 'u')

{

count++;

}

}

return count;

}

}

OutPut ScreenShot

Word File Explaining 4 Functions :
find_average - This Function Takes Two Parameters . One is Array and Other is Size of Array .It returns the Average of numbers passed as parameteres

Find_Sum : This Function Takes Two Parameters . One is Array and Other is Size of Array . It returns The Sum of numbers passed as parameters

Check Pallindrome : This Function Takes a string and Check Wether that string is a pallindrome string or not . It return True if string and reverse of that string return equal

Number_of_Vowels : This Function Takes a String and return the number of Vowels in that string