update

java/wordStat/WordStatLengthMiddle.java

@@ -0,0 +1,93 @@
+import java.io.*;
+import java.util.*;
+
+/**
+ * @author Nikita Doschennikov (me@fymio.us)
+ */
+public class WordStatLengthMiddle {
+
+    public static void main(String[] args) {
+        if (args.length != 2) {
+            System.err.println("incorrect input!");
+            System.err.println(
+                "usage: java WordStatLengthMiddle <inputFile> <outputFile>"
+            );
+        }
+
+        String inputFileName = args[0];
+        String outputFileName = args[1];
+        try {
+            BufferedReader r = new BufferedReader(
+                new FileReader(inputFileName)
+            );
+
+            Map<String, WordInfo> wordMap = new HashMap<>();
+            StringBuilder sb = new StringBuilder();
+            int wordIndex = 0;
+
+            int data = r.read();
+            while (data != -1) {
+                char c = (char) data;
+
+                if (
+                    Character.getType(c) == Character.DASH_PUNCTUATION ||
+                    Character.isLetter(c) ||
+                    c == '\''
+                ) {
+                    sb.append(c);
+                } else {
+                    if (sb.length() > 0) {
+                        String word = sb.toString().toLowerCase();
+                        if (word.length() >= 7) {
+                            word = word.substring(3, word.length() - 3);
+                            if (wordMap.containsKey(word)) {
+                                wordMap.get(word).count++;
+                            } else {
+                                wordMap.put(
+                                    word,
+                                    new WordInfo(word, 1, wordIndex)
+                                );
+                                wordIndex++;
+                            }
+                        }
+                        sb.setLength(0);
+                    }
+                }
+
+                data = r.read();
+            }
+
+            if (sb.length() > 0) {
+                String word = sb.toString().toLowerCase();
+                if (word.length() >= 7) {
+                    word = word.substring(3, word.length() - 3);
+                    if (wordMap.containsKey(word)) {
+                        wordMap.get(word).count++;
+                    } else {
+                        wordMap.put(word, new WordInfo(word, 1, wordIndex));
+                        wordIndex++;
+                    }
+                }
+            }
+
+            r.close();
+
+            List<WordInfo> sortedWords = new ArrayList<>(wordMap.values());
+            sortedWords.sort(
+                Comparator.comparingInt((WordInfo w) ->
+                    w.word.length()
+                ).thenComparingInt(w -> w.firstIndex)
+            );
+
+            PrintWriter writer = new PrintWriter(outputFileName, "UTF-8");
+
+            for (WordInfo info : sortedWords) {
+                writer.println(info.word + " " + info.count);
+            }
+
+            writer.close();
+        } catch (Exception ex) {
+            System.err.println("An error occured: " + ex.getMessage());
+        }
+    }
+}