Please help I'm trying make this run

I'm doing a java program

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import java.util.Scanner;
public class getSales 
{


    private static String monthArray[] = 
            {
                "January", "February", "March", "April", "May", "June", "July", "August",
                    "September", "October", "November", "December"
            };


            //declare array
    private static double monthlySales[] = new double[12];
    private static int currentMonth = 0;

            public static void main(String[] args)

    {
        // TODO Auto-generated method stub

        //declare variables
                double getSales, totalSales, averageSales, highestMonth, lowestMonth, highestSales, lowestSales;




        for ( currentMonth = 0; currentMonth < monthlySales.length; currentMonth++) monthlySales[currentMonth] = 
                getSales();

        int highestMonthIndex = computeHighestMonth(monthlySales);
        int lowestMonthIndex = computeLowestMonth (monthlySales);

        displaySaleInfo(computeTotalSales(monthlySales), computeAverageSales (monthlySales),
                highestMonthIndex, monthlySales[highestMonthIndex], lowestMonthIndex, monthlySales[lowestMonthIndex]);





    } //End of Main


    private static int getSales()
    {
        Scanner input = new Scanner(System.in);
        int size = monthArray.length; 
        for (int i = 0; i < size; i++){
        System.out.print("Please Enter Sales for " + monthArray[i] + ":");
        monthlySales[i] = input.nextInt();
        //get sales method to store values into monthlysales
    }



    //gets monthly sales and returns total sales for the year
    public static double computeTotalSales(double monthlySales[]) 
    {
        double sum = 0;
        for (int i = 0; i < monthlySales.length; i++) 
        {
            sum += monthlySales[i];

        }
        return sum;
    }

    //gets monthly sales and returns average sales
    public static double computeAverageSales (double monthlySales[]) 
    {
        return computeTotalSales (monthlySales) / monthlySales.length;
    }

    //determine month with the highest sales
    public static int computeHighestMonth (double monthlySales[]) 
    {
        int index = 0;
        double val = monthlySales[0];
        for (int i = 0; i < monthlySales.length; i++) 
        {
            if (monthlySales[i] > val) 
            {
                val = monthlySales[i];
                index = i;
            }
        }
        return index;

    }

    //determine month with the lowest sales
    public static int computeLowestMonth (double monthlySales[]) 
    {
        int index = 0;
        double val = monthlySales[0];
        for (int i = 0; i < monthlySales.length; i++) 
        {
            if (monthlySales[i] < val) 
            {
                val = monthlySales[i];
                index = i;
            }
        }
        return index;

    }

    //displays all the sales data rounded to two decimal places
    public static void displaySaleInfo (double totalSales, double averageSales,
            int highestMonth, double highestSales, int lowestMonth, double lowestSales) 
    {

        System.out.printf("TotalSales: %.2f" , totalSales);
        System.out.printf("AverageSales: %.2f" , averageSales);
        System.out.println("HighestMonth: " + monthArray[highestMonth]);
        System.out.printf("HighestSales: %.2f" , highestSales);
        System.out.println("LowestMonth: " + monthArray[lowestMonth]);
        System.out.printf("LowestSales: %.2f" , lowestSales);
    }



} //End of Class

I'm doing a java program

Then perhaps you should find a java forum instead of this C++ forum?

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