Thread: Array question. Stumped!

thanks for the help as always. I'm stuck on this problem and i don't know why this isn't working. This is my first time using array's so that's probably why i don't know what i am doing but here it is..

The problem lies when calling the getHighest and getLowest method. The error i get is..

The method getHighest(double[]) in the type RainfallClass is not applicable for the arguments ()

Also note i'm not supposed to use any other classes just methods.

import java.util.Scanner;
import java.text.DecimalFormat;
 
public class RainfallClass
{
   public static void main(String[] args)
   {
      DecimalFormat fmt = new DecimalFormat("0.00");
 
      //call the getTotal method
      double tot = getTotal();
 
      //call and pass the average method
      double average = getAverage(tot);
 
      //Call and pass the highest method
      double highest = getHighest();
 
      //Call and pass the lowest method
      double lowest = getLowest();
 
      //Display output
      System.out.println("Total\t\tAverage\t\tHighest\t\tLowest");
      System.out.println("..........................................................");
      System.out.println(fmt.format(tot) + " inches \t" + fmt.format(average) + " inches \t" 
                     + fmt.format(highest) + " inches\t" + fmt.format(lowest) + " inches");
 
   }
   public static double getTotal()
   {
 
      double total = 0.0;
      double[] inches = new double[12];
      String[] months = {"January", "February", "March", "April", "May",
                     "June", "July", "August", "September", "October",
                     "November", "December"};
 
      Scanner keyboard = new Scanner(System.in);
 
      for (int i = 0; i < inches.length; i++)
      {
         System.out.println("Enter the total rainfall for " + months);
         inches = keyboard.nextDouble();
         keyboard.nextLine();
            while (inches < 0)
            {   
               System.out.println("Entry must be a postive number");
               System.out.println("Enter the total rainfall for " + months);
               inches = keyboard.nextDouble();
               keyboard.nextLine();
            }
         total += inches;
      }
      getHighest(inches);
      getLowest(inches);
      return total;
   }
   public static double getAverage(double a)
   {
      double average = a / 12;
      return average;
 
   }
   public static double getHighest(double[] h)
   {
      double highest = h[0];
 
      for (int j = 0; j < h.length; j++)
      {
         if (h[j] > highest)
            highest = h[j];
      }
 
      return highest;
   }
   public static double getLowest(double[] l)
   {
      double lowest = l[0];
 
      for (int j = 0; j < l.length; j++)
      {
         if (l[j] < lowest)
            lowest = l[j];
      }
 
      return lowest;
 
 
   }
}

System.out.println("Enter the total rainfall for " + months);

It should be

System.out.println("Enter the total rainfall for " + months[i]);

In getHighest();

for (int j = 0; j < h.length; j++)

start from j=1, no need to start again from 0.

getHighest(inches);
getLowest(inches);

These functions are returning double type values but you are not, catching them. MISSED!!!

//Call and pass the highest method
      double highest = getHighest();
 
      //Call and pass the lowest method
      double lowest = getLowest();

Why again?
Call them at any one place. Either here or in getTotal().

ok for some reason the code i pasted and the code i have in Eclipse is different. I do have months[i]. But the other stuff is wrong. The reason i am calling them in the getTotal method is to pass the inches to to other methods. But in the main method i want to print out a little table so i need to call them to print them out. Otherwise i'm not sure how to do it!

The error you posted at the top is simple to fix. Look at your main method. You are doing the following: double highest = getHighest(); The problem here is your getHighest() method needs to take in a param of double [] because thats how you defined it. so in order to remove the error simply change your code to look something like this: double highest = getHighest(double [] i); or some array of doubles you defined earlier.

Dejan