java - 我的Java总计方法无法在我的主要方法中使用

我的每月降雨计划的第2版，并应用了修改和建议。非常感谢您的帮助，这确实让我思考。关于编程的奇妙之处在于，如何使陌生人完全团结起来解决问题。

// Rainfall Class Start

import java.util.Scanner;
import java.io.*;
import java.text.DecimalFormat;
import java.util.Arrays;

/**
 *
 * @author Adrian
 */
public class Rainfall{
   DecimalFormat twoDecimals = new DecimalFormat("##0.00");
   private final String[] Months={"Jan","Feb","Mar","Apr","May","Jun",
                           "Jul","Aug","Sep","Oct","Nov","Dec"};;
   private final double[] Rainfall;

   public Rainfall() throws IOException
   {
      Rainfall = new double[12];
   }
   public double getAverageRainFall()
   {
      return getTotalRainFall() / 12 ;
   }
   public void outputToFile()throws IOException
       {
       try (PrintWriter outputFile = new PrintWriter("Months.txt")) {
           Scanner kb=new Scanner(System.in);

           System.out.println("For each month enter a rainfall amount");

           for (int i=0;i<12;i++)
           {
               System.out.println(Months[i]+"?");
               Rainfall[i]=kb.nextDouble();
               outputFile.println(Months[i]+" "+Rainfall[i]);
               System.out.println(Months[i]+" "+Rainfall[i]);
           }
       }
       }

    /**
     *
     * @return
     */
    public double getTotalRainFall()
   {
      double total = 0.0;  // Accumulator initialized to 0

      // Accumulate the sum of the rain array elements.
      for (int i = 0; i < Rainfall.length; i++)
         total += Rainfall[i];

      // Return the sum.
      return total;
   }
    public double getLowestMonth()
   {
      int lowest = 0;

      // Find the element with the lowest value.
      for (int i = 1; i < Rainfall.length; i++)
      {
         if (Rainfall[i] < Rainfall[lowest])
            lowest = i;
      }
      // Return the element number.
      return lowest+1;
      }
    public int getHighestMonth()
   {
      int highest = 0;

      // Find the element with the highest value.
      for (int i = 1; i < Rainfall.length; i++)
      {
         if (Rainfall[i] > Rainfall[highest])
            highest = i;
      }
      // Return the element number.
      return highest;
   }
    public void displayMessage(){
          System.out.println("----------------------");
          System.out.println("Monthly Rainfall Totals For 2014");
          System.out.println(Arrays.toString(Months));
          System.out.println(Arrays.toString(Rainfall));
          System.out.println("Average Rainfall = "  +getAverageRainFall());
          System.out.println("Total Rainfall   = "  +getTotalRainFall());
          System.out.println("Highest Month    = "  +getHighestMonth());
          System.out.println("Lowest Month     = "  +getLowestMonth());
          System.out.println("----------------------");
}
    public double getRainAt(int e)
   {
      return Rainfall[e];
   }
   }



  /*public void inputFromFile() throws IOException
   {
      File myFile=new File ("Months.txt");
      Scanner inputFile=new Scanner(myFile);

      //loop through the file

      for(int i=0;i<12;i++){
         Months[12] = inputFile.nextLine();
         inputFile.close();
      }
   }*/

//结束类
   //主方法的开始

导入java.io. *;
   导入java.text.DecimalFormat;

public class Rainfall2{

    public static void main(String[] args) throws IOException
      {
             // The low month

         DecimalFormat twoDecimals = new DecimalFormat("##0.00");
         Rainfall myData=new Rainfall();

         myData.outputToFile();
         myData.displayMessage();

      }
}

我的每月降雨计划的第2版，并应用了修改和建议。非常感谢您的帮助，这确实让我思考。关于编程的奇妙之处在于，如何使陌生人完全团结起来解决问题。

最佳答案

编译器实际上是正确的，您不能从静态main :)调用non stati方法，请在getTotalRainFall();的实例上调用Rainfall。

Edit1：感谢puj，修复了该错误。

Edit2：实际上，您的代码看起来有些混乱，Prices类是什么？你应该在那里降雨吗？最终得到如下结果：

RainFall rf=new RainFall();
rf.inputFromFile();
rf.getTotalRainFall();
rf.outputToFile();

Crystal，我可以建议您使用从这些答案中得到的建议从头开始重写它吗？