Printing the summary of a series of questions using non-void method

Question

Hy. I wrote this piece of code

import java.util.Scanner;
public class SportsEvents {
public static void main(String[] args) {
    String[] contestants = getcontestants();
    int[] score=getscores();
    System.out.println("The maximum score is: "+getMaxValue(score));
    System.out.println("The minimum score is: "+getMinValue(score)); 
    System.out.println("The average is: "+getAverage(score));
}
public static String[] getcontestants()
{
    int numcontestants=1;
    String name[] = new String[numcontestants];

    for(int j=0;j<numcontestants;j++){
        Scanner ip=new Scanner(System.in);
        System.out.println("Enter contestant's name");
        name[j]=ip.nextLine();
    }
    return name;
}
public static int[] getscores()
{
    int numscores=8;
    int score[] = new int[numscores];
    for (int a=0;a<numscores;a++){
        Scanner ip=new Scanner(System.in);
        System.out.println("Enter the scores");
        score[a]=ip.nextInt();
    }
    return score;
}
public static int getMaxValue(int[] array) {
    int maxValue = array[0];
    for (int i = 1; i < array.length; i++) {
        if (array[i] > maxValue) {
            maxValue = array[i];
        }
    }
    return maxValue;
}
public static int getMinValue(int[] array) {
    int minValue = array[0];
    for (int i = 1; i < array.length; i++) {
        if (array[i] < minValue) {
            minValue = array[i];
        }
    }
    return minValue;
}
public static int getAverage(int[] people) {
   int sum = 0;
   for (int i=0; i < people.length; i++) {
        sum = sum + people[i];
   }
   int result = sum / people.length;
   return result;
}
}

As you can see, the user enters a name and 8 scores and the computers find the biggest score, the lowest score, and the average. I want a non-void method that will give a summary of everything but I don't know how to do it. Ex: If I entered James as a name and the numbers 1-8, I want it to print: The contestant is James, his highest score was 8. His lowest score was 1. His average is 49. Thank you and tell me if it's confusing!!

Do you mean, you need to write one method that'll return all the info? — Thiyagu, May 12 '18 at 05:09
Possible duplicate of [What causes a java.lang.ArrayIndexOutOfBoundsException and how do I prevent it?](https://stackoverflow.com/questions/5554734/what-causes-a-java-lang-arrayindexoutofboundsexception-and-how-do-i-prevent-it) — Amadou Toure, May 12 '18 at 19:52

Mạnh Quyết Nguyễn · Answer 1 · 2018-05-12T05:23:42.790

What you want is to store your immediate result into a single object contains min, max, avg.

In java 8 there's already a method out of the box for you:

int[] score=getscores();
IntSummaryStatistics stats = Arrays.stream(score).summaryStatistics();

IntSummaryStatistics contains

private long count;
private long sum;
private int min;
private int max;

You can also manually get that result:

First define a class will hold your data:

public class SportsEvents {

   public static class IntArrayStatistic {
        private int min = Integer.MAX_VALUE;
        private int max = Integer.MIN_VALUE;
        private int sum = 0;
        private int avg;
        private int count;

        // Getter - Setter

        public static IntArrayStatistic of(int[] input) {
            if (input == null) {
                throw new IllegalArgumentException("Null array");
            }
            IntArrayStatistic result = new IntArrayStatistic();
            result.count = input.length;

            for (int i : input) {
                if (i < result.min) {
                    result.min = i;
                }
                if (i > result.max) {
                    result.max = i;
                }
                result.sum += i;
            }
            result.avg = result.sum / result.count;
            return result;
        }
    }
}

And to use this:

int[] score=getscores();
IntArrayStatistic stats = IntArrayStatistic.of(score);

I want to keep my program but make a new non-void method that will just do a review of the prompt — Amadou Toure, May 12 '18 at 06:04

Printing the summary of a series of questions using non-void method

1 Answers1