Question

In Java language: Write a rainfall class that stores the total rainfall for each of 12 months of years 2015 -2017 into an 2D array of doubles. Use the text file at Actividades/Tareas link as input of rainfall data. The program should read the input data from a text file. The program should have methods that at least return the following: • Total rainfall for the years 2015 – 2017 - return a 1D array • The average monthly rainfall for years 2015-2017 - return a 1D array • The year with the most rain • The year with the least rain • The month with the most rain in a specific year • The month with the least rain in a specific year Demonstrate the class in a complete program.

Example of rainfall data:

2015: 4.96 3.27 1.50 1.38 2.28 2.11 1.61 5.93 4.30 1.77 8.72 3.47
2016: 1.60 3.88 2.22 10.02 7.16 2.74 5.10 5.14 4.91 6.39 17.65 4.30
2017: 1.81 1.70 6.04 6.25 4.53 3.93 6.66 7.68 15.79 6.61 10.16 3.33

Answer 1

Note: Could you plz go through this code and let me know if u need any changes in this.Thank You
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We have to paste the input file in the project folder

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// rainfall.txt

2015: 4.96 3.27 1.50 1.38 2.28 2.11 1.61 5.93 4.30 1.77 8.72 3.47
2016: 1.60 3.88 2.22 10.02 7.16 2.74 5.10 5.14 4.91 6.39 17.65 4.30
2017: 1.81 1.70 6.04 6.25 4.53 3.93 6.66 7.68 15.79 6.61 10.16 3.33

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// ReadFileRainfall.java

import java.io.File;
import java.io.FileNotFoundException;
import java.text.DecimalFormat;
import java.util.Scanner;

public class ReadFileRainfall {

   public static void main(String[] args) throws FileNotFoundException {
       // DecimalFormat class is used to format the output
       DecimalFormat df = new DecimalFormat(".00");
       // Declaring char array
   String months[] = { "January", "February", "March", "April", "May", "June", "July",
   "August", "September", "October", "November", "December" };

       int rows=3,cols=12;
       int cnt=0;
       double rainfall[][]=new double[rows][cols];
       String years[]=new String[rows];
       Scanner sc=new Scanner(new File("rainfall.txt"));
       while(sc.hasNext())
       {
           years[cnt]=sc.next();
           for(int i=0;i<cols;i++)
           {
               rainfall[cnt][i]=sc.nextDouble();
           }
           cnt++;
       }
       sc.close();
      
       double yearsTot[]=totYearsRainfall(rainfall);
       double avgMonthRain[]=avgMonthlyRainFall(rainfall);
       for(int i=0;i<yearsTot.length;i++)
       {
           System.out.println("Total Rainfall in "+years[i]+":"+df.format(yearsTot[i]));
       }
      
       for(int i=0;i<months.length;i++)
       {
           System.out.println("Average rainfall in "+months[i]+":"+df.format(avgMonthRain[i]));
       }
      
       int maxYearIndx=maxRainInYear(yearsTot);
       System.out.println("Year with most rain is :"+years[maxYearIndx]);
       int minYearIndx=minRainInYear(yearsTot);
       System.out.println("Year with least rain is :"+years[minYearIndx]);
       int year=2015;
       int yearIndx=getYearIndx(years,year);
       int maxRainMonIndx=maxRainInYear(rainfall[yearIndx]);
       System.out.println("Maximum rain in year "+year+" in the month "+months[maxRainMonIndx]);
       year=2017;
       yearIndx=getYearIndx(years,year);
       int minRainMonIndx=minRainInYear(rainfall[yearIndx]);
       System.out.println("Minimum rain in year "+year+" in the month "+months[minRainMonIndx]);
   }

   private static int getYearIndx(String[] years, int year) {
       int indx=0;
       for(int i=0;i<years.length;i++)
       {
           if(Integer.parseInt(years[i].substring(0,years[i].length()-1))==year)
           {
               indx=i;
           }
       }
       return indx;
   }

   private static int minRainInYear(double[] tot) {
       double min=tot[0];
       int indx=0;
       for(int i=0;i<tot.length;i++)
       {
           if(min>tot[i])
           {
               min=tot[i];
               indx=i;
           }
       }
       return indx;

   }

   private static int maxRainInYear(double[] tot) {
       double max=tot[0];
       int indx=0;
       for(int i=0;i<tot.length;i++)
       {
           if(max<tot[i])
           {
               max=tot[i];
               indx=i;
           }
       }
       return indx;
   }

   private static double[] avgMonthlyRainFall(double[][] rainfall) {
       double avg[]=new double[rainfall[0].length];
       double sum=0;
       for(int i=0;i<rainfall[0].length;i++)
       {
           sum=0;
           for(int j=0;j<rainfall.length;j++)
           {
               sum+=rainfall[j][i];
           }
           avg[i]=sum/rainfall.length;
       }
       return avg;
   }

   private static double[] totYearsRainfall(double[][] rainfall) {
       double tot[]=new double[rainfall.length];
       double sum=0;
       for(int i=0;i<rainfall.length;i++)
       {
           sum=0;
           for(int j=0;j<rainfall[0].length;j++)
           {
               sum+=rainfall[i][j];
           }
           tot[i]=sum;
       }
       return tot;
   }

}

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Output:

Total Rainfall in 2015::41.30
Total Rainfall in 2016::71.11
Total Rainfall in 2017::74.49
Average rainfall in January:2.79
Average rainfall in February:2.95
Average rainfall in March:3.25
Average rainfall in April:5.88
Average rainfall in May:4.66
Average rainfall in June:2.93
Average rainfall in July:4.46
Average rainfall in August:6.25
Average rainfall in September:8.33
Average rainfall in October:4.92
Average rainfall in November:12.18
Average rainfall in December:3.70
Year with most rain is :2017:
Year with least rain is :2015:
Maximum rain in year 2015 in the month November
Minimum rain in year 2017 in the month February

_______________Could you plz rate me well.Thank You