Question

Assignment 7 Preparation

This assignment will focus on the use of loops, random numbers, named constants, and arrays.

Assignment 7

Assignment 7 Submission

Follow the directions below to submit Assignment 7: Create a Java program. The class name for the program should be 'RandomDistributionCheck'. In the main method you should perform the following: You should generate 10,000,000 random numbers between 0 - 19. You should use an array to hold the number of times each random number is generated. When you are done, generating random numbers, you should output the random number, the number of times it occurred, and the percentage of all occurrences. The output should be displayed using one line for each random number. Use named constants for the number of iterations (10,000,000) and a second named constant for the number of unique random numbers to be generated (20). Grading criteria:

Answer 1

Thanks for the question, here is the Java class

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import java.util.Random;

public class RandomDistributionCheck {


    public static void main(String[] args) {


        Random random = new Random();
        final int ITERATION_COUNT = 10000000; // constant
        final int UNIQUE_NUMBERS = 20; // constant

        int numberOccurences[] = new int[UNIQUE_NUMBERS]; // array to store the count

        for (int count = 1; count <= ITERATION_COUNT; count++)
            numberOccurences[random.nextInt(UNIQUE_NUMBERS)]++;

// print header
        System.out.printf("%-8s %18s %22s\n", "Number", "Occurrences", "Percentage(%)");
        for (int index = 0; index < UNIQUE_NUMBERS; index++) {

// print the number the occurence count and percentage
            System.out.printf("%-8d %15d %18.2f\n", index, numberOccurences[index], numberOccurences[index] * 100.0 / ITERATION_COUNT);
        }
    }
}

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