Code Error+ problems with inputting array lists into methods?

[Kazyu]

Heres the code I'm having trouble with
The problem I'm experiencing is "error: non-static method totalRain(double[]) cannot be referenced from a static context". Which Im guessing
is caused because of improper method calling or inputting rainfall. Is there any way to have my rainfall array be used by the methods?

/**
 * @(#)Ch7_Q1.java
 *
 * Ch7_Q1 application
 *
 * @author Peter Wu CSC 210
 * @version 1.00 2013/2/14
 *Write a RainFall class that stores the total rainfall for each of 12 months into an array of
doubles. The program should have methods that return the follow ing;
• the total rainfall for the year
• the average monthly rainfall
• the month with the DOM rain
• the month with the least rain
 */

 import java.util.Scanner;
public class Ch7_Q1 {
    
    public static void main(String[] args) {
    	Scanner keyboard=new Scanner(System.in);
    	final int month=12;
    	double[] rainfall= new double[month];
    	for (int x=0;x<12;x++)
    		{
    		System.out.println("What was the rainfall for month "+(x+1)+":");
    		rainfall[x]=keyboard.nextDouble();
    		if(rainfall[x]<0)
    		{System.out.println("Please input a valid rainfall number:");
    			rainfall[x]=keyboard.nextDouble();
    		}
    		}
    		//These are the parts Im having trouble with
    		System.out.println("The total rainfall is "+totalRain(rainfall));
    		System.out.println("The avg rainfall is "+ avgRain(rainfall));
    		System.out.println("The month with the lowest rainfall is month "+minRain(rainfall));
    		System.out.println("The month with the most rainfall is month "+maxRain(rainfall));
    }
    //Methods
   public double totalRain(double[] i)
   {double sum=0;
   	for (int x=0;x<12;x++){
   	sum+=i[x];
   }
   return sum;
   }
   public double avgRain(double total)
   {double avg=total/12;
   return avg;
   }
   public double maxRain(double[] i)
   {double max=i[1];
   int month=0;
   for (int x=0;x<12;x++)
   {if(max<i[x]){
   	max=i[x];
   	month=x;}
   }
   return month;
   }
   public double minRain(double[] i)
   {double min=i[1];
   int month=0;
   for (int x=0;x<12;x++){
   	if(min>i[x]){
   		min=i[x];
   		month=x;
   	}
   }
   return min;
   }
}

[tamilarasi]

Hi Kazyu,

Yes, you code have problem with method. Because main method is static that is not call non-static method. you'll change non-static methods to static methods..like below..

  //Methods
       public static double totalRain(double[] i)
       {double sum=0;
        for (int x=0;x<12;x++){
        sum+=i[x];
       }
       return sum;
       }
       public static double avgRain(double total)
       {double avg=total/12;
       return avg;
       }
       public static double maxRain(double[] i)
       {double max=i[1];
       int month=0;
       for (int x=0;x<12;x++)
       {if(max<i[x]){
        max=i[x];
        month=x;}
       }
       return month;
       }
       public static double minRain(double[] i)
       {double min=i[1];
       int month=0;
       for (int x=0;x<12;x++){
        if(min>i[x]){
            min=i[x];
            month=x;
        }
       }
       return min;
       }

Now your code is run successfully... Then you have made another mistake on your code for calculate the average method avgRain(rainfall). you passed array as a parameter. You created a method only used double variable like double avgRain(double total)..So will change the code like below

double sum=totalRain(rainfall);
 System.out.println("The avg rainfall is "+ avgRain(sum));

[Kazyu]

Thank you so much for your help and wow I didnt notice the mistakes until you pointed them out.