Question

Programming 5_1:

Create a Java class named <YourName>5_1

In this class create a main method, but for now leave it empty. Then write a Java method getAverage which takes an array of integers as it’s argument. The method calculate the average of all the elements in the array, and returns that average. The method should work for an array of integers of any length greater than or equal to one. The method signature is shown below:

public static double getAverage( int[] a)
Sample data and results are as below:

If array is:	The method would return:
{ 5, 10, 15, 20,25,30,35 }	20
{ 1, 3, 5,7,9,11 }	6

You may leave your main method blank, or you can include sample arrays to test your method. Compile your code. Your code with be tested with inputs that produce known outputs.

Programming 5_2:

Create a Java class named <YourName>5_2

In this class create a main method, but for now leave it empty. Include the method public

static int sumOfEvens( int[] myArray ) that accepts an integer array named myArray. This method should return the sum of the even integers in myArray.

Sample data and results are as below:   

myArray	Sum of the even integers
{20, 40, 15, 12, 7, 1, 5,6}	78

where the method would return 78, since the sum of the even numbers 20,40,12,and 6 is 78.

You may leave your main method blank, or you can include sample arrays to test your method.

Your implementation will be tested with array inputs that produce known outputs.

Programming 5_3:

Create a Java class named <YourName>5_3

In this class create a main method, but for now leave it empty. Then write a Java method findPosition, which accepts two parameters: an int named target and an array of integers named numbers. The method returns the first occurrence of the subscript position/index within numbers in which target is found. Returns the value -1 if target is not stored in the array.  

The method signature is as below:  

public static int findPosition ( int target, int[] numbers)  

Sample data and return values are as below:  

Target	Array numbers	The method would return:
5	{ 1, 3, 5,7,9,11,22,8,5,7 }	2
45	{ 1, 2, 11,3, 5,7,9,11 }	-1
21	{5,40,19,21}	3

You may leave your main method blank, or you can include sample arrays to test your method. Compile your code. Your code with be tested with inputs that produce known outputs.

Answer 1

1 class JohnNash5_1 f 3 public static double getAverage( int[] a)t 4 // declaring variables double result- 0; 6 7 8 9 10 // looping through each number for(int number: a) // adding number to result result +number; 13 14 15 16 17 18 public static void main(String[] args) f 19 20 21 // returning the average return result/a.length; // sample runs System.out.println (getAverage(new int[K 5, 10, 15, 20,25,30,35 )); System.out.println (getAverage(new int[K 1, 3, 5,7,9,11)) 23

class JohnNash5_1 {

public static double getAverage( int[] a){

// declaring variables

double result = 0;

// looping through each number

for(int number: a)

// adding number to result

result += number;

// returning the average

return result / a.length;

}

public static void main(String[] args) {

// sample runs

System.out.println(getAverage(new int[]{ 5, 10, 15, 20,25,30,35 }));

System.out.println(getAverage(new int[]{ 1, 3, 5,7,9,11 } ));

}

}

// OUTPUT

// 20.0

// 6.0