see the link of the quostion then give me the correction of my answer below http

Question

see the link of the quostion then give me the correction of my answer below

http://www.johnloomis.org/ece538/asgn/asgn03/ece538_03.html

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my answer need to correct

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Class: Main.java

import java.io.*;
import java.text.DecimalFormat;
import java.util.Scanner;
public class Main{

public static void main(final String[] args) throws IOException {
// TODO Auto-generated method stub
DecimalFormat f = new DecimalFormat("##.00");
Resistor myRes = new Resistor();
Scanner keyboard = new Scanner(System.in);
File file = new File("D:\files\example.txt");       //Path of input file.
       FileReader fileReader;
       fileReader = new FileReader(file);
       BufferedReader bufferedReader = new BufferedReader(fileReader);
      
      
       StringBuilder sb = new StringBuilder();
       String line=" ";
       String[] tokens=null;
       while ((line=bufferedReader.readLine())!=null)                           
       {
           sb.append(line);                                               // Reading from file and putting it in StringBuilder.
           sb.append(" ");
  
       }
       line=sb.toString();
       String delims = "[ ]+";
       tokens = line.split(delims);
      
for(int i=0;i<tokens.length;i++)
{   if(i+i+1>=tokens.length)
   {
       break;
   }
   Double res=Double.parseDouble(tokens[i+i+1]);
   myRes.res.add(res);
}
  
  
System.out.println(" Total Resistance in Series : " + myRes.calculateSeriesResistance());
System.out.println("Total Resistance in Parallel : "+myRes.calculaParallelResistance());
System.out.println("Overall Resistance is "+(myRes.calculaParallelResistance()+myRes.calculateSeriesResistance()));
  
String text = "Total Resistance in Series : " + myRes.calculateSeriesResistance()+" Total Resistance in Parallel : "+myRes.calculaParallelResistance()
       +" Total Combined Resistance is "+(myRes.calculaParallelResistance()+myRes.calculateSeriesResistance());
BufferedWriter output = null;
try {
File opfile = new File("D:\files\output.txt");                   //output file path
output = new BufferedWriter(new FileWriter(opfile));
output.write(text);
} catch ( IOException e ) {
e.printStackTrace();
} finally {
if ( output != null ) output.close();
System.out.println("Output added!!");
}
  
}
}

Class: Resistor.java

import java.util.ArrayList;
public class Resistor {
  
public int userChoice;
ArrayList<Double> res = new ArrayList<Double>();
/**
*Chooses which process follows next.
*/
public final double calculateResistance() {
if (userChoice == 1) {
return calculateSeriesResistance();
} else {
return calculaParallelResistance();
}
}
/**Returns object of parallel circuit.
*
* @return 1 / runningResistance.
*/
public double calculaParallelResistance() {
double runningResistance = 0;
//use size() instead of length, which doesn't exist in ArrayList
for (int i = 0; i < res.size(); i++) {
//also, iterate over each resistor's value, and to get it,
//use...err, get() method smile emoticon
runningResistance += (1 / res.get(i));
}
return 1 / runningResistance;
}
/**Returns object of series circuit.
*
* @return runningResistance.
*/
public double calculateSeriesResistance() {
double runningResistance = 0;
for (int i = 0; i < res.size(); ++i) {
runningResistance = runningResistance + res.get(i);
}
return runningResistance;
}
}

Explanation / Answer

/*Program to take from command line as input*/

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.text.DecimalFormat;

public class MainCommand {

   public static void main(final String[] args) throws IOException {
       // TODO Auto-generated method stub
       DecimalFormat f = new DecimalFormat("##.00");
       Resistor myRes = new Resistor();

       for(int i=0;i<args.length;i++)
       { if(i+i+1>=args.length)
       {
           break;
       }
       Double res=Double.parseDouble(args[i+i+1]);
       myRes.res.add(res);
       }

       System.out.println(" Total Resistance in Series : " + myRes.calculateSeriesResistance());
       System.out.println("Total Resistance in Parallel : "+myRes.calculaParallelResistance());
       System.out.println("Overall Resistance is "+(myRes.calculaParallelResistance()+myRes.calculateSeriesResistance()));

       String text = "Total Resistance in Series : " + myRes.calculateSeriesResistance()+" Total Resistance in Parallel : "+myRes.calculaParallelResistance()
               +" Total Combined Resistance is "+(myRes.calculaParallelResistance()+myRes.calculateSeriesResistance());
       BufferedWriter output = null;
       try {
           File opfile = new File("C:\Users\manikanta\Desktop\Chegg\output.txt"); //output file path
           output = new BufferedWriter(new FileWriter(opfile));
           output.write(text);
       } catch ( IOException e ) {
           e.printStackTrace();
       } finally {
           if ( output != null ) output.close();
           System.out.println("Output added!!");
       }

   }
}

/*Program for Resistor.java*/

import java.util.ArrayList;
public class Resistor {

   public int userChoice;
   ArrayList<Double> res = new ArrayList<Double>();
   /**
   *Chooses which process follows next.
   */
   public final double calculateResistance() {
       if (userChoice == 1) {
           return calculateSeriesResistance();
       } else {
           return calculaParallelResistance();
       }
   }
   /**Returns object of parallel circuit.
   *
   * @return 1 / runningResistance.
   */
   public double calculaParallelResistance() {
       double runningResistance = 0;
       //use size() instead of length, which doesn't exist in ArrayList
       for (int i = 0; i < res.size(); i++) {
           //also, iterate over each resistor's value, and to get it,
           //use...err, get() method smile emoticon
           runningResistance += (1 / res.get(i));
       }
       return 1 / runningResistance;
   }
   /**Returns object of series circuit.
   *
   * @return runningResistance.
   */
   public double calculateSeriesResistance() {
       double runningResistance = 0;
       for (int i = 0; i < res.size(); ++i) {
           runningResistance = runningResistance + res.get(i);
       }
       return runningResistance;
   }
}

================================================

Result :--

javac MainCommand.java

java MainCommand R1 1000 R2 500 R3 600

Total Resistance in Series : 2100.0
Total Resistance in Parallel : 214.28571428571428
Overall Resistance is 2314.285714285714
Output added!!

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