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Got it done. Early. :)

Next week is the final. I'm guessing tomorrow we'll do...um...I have no idea.

We didn't get to ArrayLists in class, so I'm assuming they'll not be on the final. After that is two-dimensional arrays. However, I'm going to finish reading out the chapter because there's a chapter supplement titled "Search and Sort Algorithms", covering Linear Search, Binary Search, Big-O Notation, Selection Sort, Exchange (Bubble) Sort, and Quicksort. I'm betting that those will come in handy sometime. ;)

Ok, on to the assignment and code.

Chapter 8 Java Assignment

1. CREATE a class called Experiment
a. Add an import statement to use java.io.*
b. Add the main() method in this class
i. Declare a named constant (final variable) called ARRAY_SIZE set to a value of 10
ii. Declare an integer array using ARRAY_SIZE to set the number of elements
c. Add a static void function popArray() with two parameters: an integer array ary[] and an integer size
i. Add the throws statement for java.io.IOException
ii. Add a for loop with iterations limited by the parameter size
1. Use a try/catch catching a NumberFormatException exception
2. Prompt the user for a whole number data reading
3. Use the BufferedReader's readLine() method to place the entered value into a String variable and into each array element
iii. In the main() method, use an appropriate try/catch to call the popArray() method
d. Add a static void function prnArray() with two parameters: an integer array ary[] and an integer size
i. Use a for loop to display all values in the array
ii. In the main() method, call prnArray()
e. Add a static double method getAvg() with two parameters: an integer array ary[] and an integer size
i. Use a for loop to calculate the average of all values in the array
ii. Return the average
iii. In the main() method, call getAvg() to retrieve the average data reading and display it with printf()
f. Add a static int function getMax() returning the maximum value using a for loop and call it from main() to display the value as in e.iii
g. Add a static int function getMin() returning the minimum value using a for loop and call it from main() to display the value as in e.iii

Experiment.java

/**
*
* Experiment
*
* @author Sam O
* @version 20061206
*/
 
import java.io.*; // needed for input
 
public class Experiment
{
    public static void main(String[] args)
    throws java.io.IOException
    {
        final int ARRAY_SIZE = 10;
        int myArray[] = new int[ARRAY_SIZE];
        double avg = 0.0;
        int maximum = 0;
        int minimum = 0;
 
        try
        {
            popArray(myArray, ARRAY_SIZE);
        }
        catch(NumberFormatException n)
        {
            System.out.print("ERROR: I don't know what I'm doing.\n");
        }
 
        prnArray(myArray, ARRAY_SIZE);
 
        avg = getAvg(myArray, ARRAY_SIZE);
 
        System.out.printf("The average is " + avg + ".%n");
 
        maximum = getMax(myArray, ARRAY_SIZE);
 
        System.out.printf("The largest number is " + maximum + ".%n");
 
        minimum = getMin(myArray, ARRAY_SIZE);
 
        System.out.printf("The smallest number is " + minimum + ".%n");
 
    }
 
    public static void popArray(int ary[], int size) // function to populate array
    throws java.io.IOException
    {
        try
        {
            int i;
            String inputStr;
 
/*
            * Prompt user for input
            */
            System.out.println("For this exercise, you will need to enter " + size + " integers : ");
 
            for (i = 0; i < size; i++)
            {
                System.out.print("Please enter an integer : ");
 
//needed for conversion capabilities
                InputStreamReader isr = new InputStreamReader(System.in);
 
//needed to use readLine()
                BufferedReader br = new BufferedReader(isr);
 
// inputStr = br.readLine();
 
                ary[i] = Integer.parseInt(br.readLine());
 
            }
        }
        catch(NumberFormatException n)
        {
            System.out.print("ERROR: An integer number was not entered.\n");
        }
 
    }
 
    public static void prnArray(int ary[], int size) // function to print array element values
    {
        int i;
 
        for (i = 0; i < size; i++)
        System.out.println("The number in ary[" +i +"] is " + ary[i]); // print the element values
    }
 
    public static double getAvg(int ary[], int size) // function to get the average
    { // of all array element values
        int i;
        double average = 0;
 
        for (i = 0; i < size; i++)
        {
            average = average + ary[i];
        }
 
        average = average / size;
 
        return average;
    }
 
    public static int getMax(int ary[], int size) // function to get the largest number
    { // from all array element values
        int i = 0;
        int maxNum = 0;
 
        maxNum = ary[0];
 
        for (i = 1; i < size; i++)
        {
            if (maxNum < ary[i])
            maxNum = ary[i];
        }
 
        return maxNum;
    }
 
    public static int getMin(int ary[], int size) // function to get the smallest number
    { // of all array element values
        int i = 0;
        int smallNum = 0;
 
        smallNum = ary[0];
 
        for (i = 1; i < size; i++)
        {
            if (smallNum > ary[i])
            smallNum = ary[i];
        }
 
        return smallNum;
    }
 
}

Blast away. :)

For the record, I know I'm not looping back around when incorrect data is input to have the user re-enter. I'm going to try to do that tomorrow before class.

This was a fun one, too. Easy, but fun. :)