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  1. import java.util.*;
  2.  
  3. public class Words {
  4.  
  5.     public String countWords(List<String> lines) {
  6.         StringBuilder result = new StringBuilder();
  7.  
  8.         HashMap<String, Integer> wordsCount = new HashMap<>();
  9.         for (String line : lines)
  10.         {
  11.             line=line.toLowerCase(Locale.ROOT);
  12.             line = line.replaceAll("[^\\p{L}\\p{Nd}]+", " ");
  13.             String[] words = line.split(" ");
  14.             for (String word: words) {
  15.                     if( wordsCount.containsKey(word)){
  16.                         wordsCount.put(word, wordsCount.get(word)+1 );
  17.                     }else{
  18.                         wordsCount.put(word, 1);
  19.                 }
  20.             }
  21.             TreeMap<String, Integer> sortedMap = new TreeMap<>(wordsCount);
  22.             for (Map.Entry<String, Integer> entry :sortedMap.entrySet() ) {
  23.                 if ( (entry.getValue()>9) && (entry.getKey().length()>3 ) ){
  24.                     result.append(entry.getKey() + " - " + entry.getValue() + "\r\n");
  25.                 }
  26.             }
  27.         }
  28.         return (result.toString());
  29.     }
  30.  
  31. }
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
Main.java:3: error: class Words is public, should be declared in a file named Words.java
public class Words {
       ^
1 error
stdout
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Standard output is empty
https://ideone.com/qzxd9C
language:
Java (HotSpot 12)
created:
2 years ago
visibility:
public

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