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  1. import java.io.*;
  2. import java.util.*;
  3. import java.util.stream.Collectors;
  4.  
  5. public class DifferenceCalculator {
  6.  
  7.     public static void main(String[] args) {
  8.         try {
  9.             List<String> lines = readLinesFromFile("numbers.csv");
  10.             int sumOfDifferences = lines.stream()
  11.                                         .mapToInt(DifferenceCalculator::calculateDifference)
  12.                                         .sum();
  13.             System.out.println(sumOfDifferences);
  14.         } catch (IOException e) {
  15.             e.printStackTrace();
  16.         }
  17.     }
  18.  
  19.     private static int calculateDifference(String str) {
  20.         List<Integer> lst = Arrays.stream(str.split(","))
  21.                                   .map(String::trim)
  22.                                   .map(Integer::parseInt)
  23.                                   .collect(Collectors.toList());
  24.         int max = Collections.max(lst);
  25.         int min = Collections.min(lst);
  26.         return max - min;
  27.     }
  28.  
  29.     private static List<String> readLinesFromFile(String filename) throws IOException {
  30.         List<String> lines = new ArrayList<>();
  31.         try (BufferedReader reader = new BufferedReader(new FileReader(filename))) {
  32.             String line;
  33.             while ((line = reader.readLine()) != null) {
  34.                 lines.add(line);
  35.             }
  36.         }
  37.         return lines;
  38.     }
  39. }
  40.  
  41.  
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin
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Standard input is empty
compilation info 
Main.java:5: error: class DifferenceCalculator is public, should be declared in a file named DifferenceCalculator.java
public class DifferenceCalculator {
       ^
1 error
stdout
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Standard output is empty
https://ideone.com/OLSRoA
language:
Java (HotSpot 12)
created:
106 days ago
visibility:
secret

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