Finding the Average

I'm trying to find the average of "pressure" in the code. However, "pressure" is an array. My main question is: how would I find the average of the numbers in an array?
In the code, there area that contains the array "pressure" is all the way towards the bottom.

Code Java:

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import java.util.Scanner;
import java.io.File;
import java.io.IOException;
public class Hurricanes2
{
    public static void main(String[] args) throws IOException
    {
        Scanner inFile = new Scanner(new File("hurcdata2.txt"));
        int numLines = 0;
 
 
        while(inFile.hasNextLine()) 
        { 
            inFile.nextLine(); 
            numLines++; 
        } 
        inFile.close(); 
        inFile = new Scanner(new File("hurcdata2.txt")); 
 
        int [] years = new int[numLines]; 
        String [] name = new String [numLines];
        int [] category = new int [numLines];
        int [] pressure = new int [numLines];
        double [] wind = new double [numLines];
        String [] month = new String [numLines];
 
        System.out.printf("%45s\n", "Hurricanes 1980 - 2006");
        System.out.println();
        System.out.println("Year     Hurricane     Category     Pressure (mb)     Wind Speed (mph)");
        System.out.println("=======================================================================");
 
        int i=0; 
        while(inFile.hasNext()) 
        { 
            years[i] = inFile.nextInt(); 
            month[i] = inFile.next(); 
            pressure[i] = inFile.nextInt(); 
            wind[i] = inFile.nextDouble(); 
            name[i] = inFile.next(); 
            i++; 
        } 
        inFile.close(); 
 
        int cat1 = 0;
        int totalCat = 0;
 
        for(int m = 0; m < wind.length; m++)
        {
            wind[m] = wind[m] * 1.15;
 
 
            if(wind[m]>=74 && wind[m]<=95)
            {
               category[m] = 1;
               totalCat++;
            }
            else if(wind[m]>=96 && wind[m]<=110)
            {
               category[m] = 2;
               totalCat+=2;
            }
            else if(wind[m]>=111 && wind[m]<=130)
            { 
               category[m] = 3;
               totalCat+=3;
            }  
            else if(wind[m]>=131 && wind[m]<=155)
            {  
               category[m] = 4;
               totalCat+=4;
            }
            else
            {
               category[m] = 5;
               totalCat+=5;
            } 
 
 
        }
 
        double avgCategory = (double)totalCat/category.length;
        int totalPres = 0;
 
        for(int p = 0; p < pressure.length; p++)
        {
            totalPres++;
        }
 
        double avgPressure = (double)totalPres/pressure.length;
 
 
        for(int n = 0; n < years.length; n++)
        {
            System.out.printf("%1d %12s %10d %15d %20.2f%n", years[n], name[n], category[n], pressure[n], wind[n]);
        }
 
        System.out.println("========================================================================");
        System.out.print("Average");
        System.out.printf("%21.0f %10.0f", avgCategory, avgPressure);
    }
}

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What you would want to do is loop through all of the array's elements and adding them together, then divide by the amount of elements.

Code java:

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int average = 0;
for (int i = 0; i < pressure.length; i++) {
   average += pressure[i];
}
average /= pressure.length;

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