Question

I have a java project where I was told to write a program that asks the user to input a number of days and temperatures. From there I have to find the average temp, the days above average temp, as well as sorting the temperatures from highest to lowest. *I have done all of these things successfully, however, my professor is asking me to simplify my code by creating separate methods. For example, having a method for the days over the average, and so on. Although I understand the concept of this, I’m not sure how to approach and go about this way. * Please help?

Here is the code that I have thus far:

import java.util.Scanner;

public class NumberAboveAverage {

    /**
     * @param args
     */
    public static void main(String[] args) {

        System.out.println("Enter number of days of temperature to calculate:");
        Scanner keyboard = new Scanner(System. in);
        int day = keyboard.nextInt();
        int[] temperature = new int[day];

        System.out.println("Enter " + day + " temperatures to calculate.");

        for(int i=0; i<day; i++){
            temperature[i] = keyboard.nextInt();
        }

        int sum = 0;
        for(int i=0; i<day; i++){
            sum = sum + temperature[i];

        }

        int average = sum/day;
        System.out.println("The average temperature is: " + average); 

        int daysOver=0;
        for(int i=0; i<day; i++){
            if (temperature[i] > average){
                daysOver++;
            }   
        }
        System.out.println("The temperature was above average for " + daysOver + " day(s).");


            for (int i = 0; i < temperature.length; i++) {
                int min = i;
                for (int j = i; j < temperature.length; j++) {
                    if (temperature[j] < temperature[min])
                        min = j;
                }
                int temp;
                temp = temperature[i];
                temperature[i] = temperature[min];
                temperature[min] = temp;
            }

    System.out.print("The temperatures in increasing order are: ");
    for(int i=0; i<day; i++){
        System.out.print(temperature[i]+" ");
    }

}   
}

Answer 1

You may want to perform one task in a separate methods as below:

 public static void main(String[] args) {
    int[] temperature = new int[1];
    Scanner keyboard = new Scanner(System. in);
    readTemperatures(keyboard, temperature);
    int sum = getSum(temperature);
    int average = sum/temperature.length;
    System.out.println("The average temperature is: " + average); 
    int daysOver=getDaysOver(temperature, average);
    System.out.println("The temperature was above average for " 
                                                         + daysOver + " day(s).");
    sortTemperature(temperature);
    printTemperature(temperature);
 }

and create methods as below:

private static void printTemperature(int[] temperature) {
    System.out.print("The temperatures in increasing order are: ");
     for(int i=0; i<temperature.length; i++){
        System.out.print(temperature[i]+" ");
     }
}

private static void readTemperatures(Scanner keyboard, int[] temperature){
       System.out.println("Enter number of days of temperature to calculate:");
       int day = keyboard.nextInt();
       temperature = new int[day];
       System.out.println("Enter " + day + " temperatures to calculate.");
       for(int i=0; i<day; i++){
        temperature[i] = keyboard.nextInt();
       }
}

Complete the rest of the methods.