P3121 Miloradov Anton task-3

src/main/java/ru/ifmo/cet/javabasics/WarAndPeaceExercise.java

@@ -2,20 +2,57 @@
 
 import java.nio.file.Path;
 import java.nio.file.Paths;
+import java.nio.file.Files;
+import java.io.*;
+import java.nio.charset.Charset;
+import java.util.stream.Collectors;
+import java.util.*;
+import java.util.stream.Stream;
+import java.util.function.Function;
 
+public class WarAndPeaceExercise
+{
 
-public class WarAndPeaceExercise {
+    public static String warAndPeace() throws IOException
+    {
 
-    public static String warAndPeace() {
         final Path tome12Path = Paths.get("src", "main", "resources", "WAP12.txt");
         final Path tome34Path = Paths.get("src", "main", "resources", "WAP34.txt");
 
+
+
         // TODO map lowercased words to its amount in text and concatenate its entries.
         // TODO Iff word "котик" occurred in text 23 times then its entry would be "котик - 23\n".
+
         // TODO Entries in final String should be also sorted by amount and then in alphabetical order iff needed.
         // TODO Also omit any word with lengths less than 4 and frequency less than 10
 
-        throw new UnsupportedOperationException();
+
+        Stream<String> strngTf = Files.lines(tome34Path.toAbsolutePath(), Charset.forName("windows-1251"));
+
+        Stream<String> strngTwlv = Files.lines(tome12Path.toAbsolutePath(), Charset.forName("windows-1251"));
+
+        Stream<String> strng = Stream.concat(strngTwlv,strngTf);
+
+
+        StringBuilder Result = new StringBuilder();
+
+        strng.map(String::toLowerCase).map(lines->lines.replaceAll("[^a-zа-я]"," "))
+
+                .flatMap(lines -> Arrays.stream(lines.split(" ")))
+                .filter(word -> word.length() > 3)
+
+                .collect(Collectors.groupingBy(Function.identity(),Collectors.counting()))
+                .entrySet()
+
+                .stream()
+                .sorted((o1, o2) ->o1.getValue().equals(o2.getValue()) ? o1.getKey().compareTo(o2.getKey()) : -(o1.getValue()).compareTo(o2.getValue()))
+                .filter(word-> word.getValue()>=10)
+
+                .forEach(word->Result.append(word.getKey()).append(" - ").append(word.getValue()).append("\n"));
+
+
+        return Result.toString().trim();
     }
 
 }