Куков Михаил. ПрИ-201. Модуль 9

task01/src/com/example/task01/Pair.java

@@ -1,5 +1,41 @@
 package com.example.task01;
 
-public class Pair {
-    // TODO напишите реализацию
+import java.util.Objects;
+import java.util.function.BiConsumer;
+
+public class Pair<T, U> {
+    private final T first;
+    private final U second;
+
+    private Pair(T first, U second) {
+        this.first = first;
+        this.second = second;
+    }
+
+    public static <T, U> Pair<T, U> of(T first, U second) {
+        return new Pair<>(first, second);
+    }
+
+    public T getFirst() {
+        return first;
+    }
+
+    public U getSecond() {
+        return second;
+    }
+
+    public void ifPresent(BiConsumer<? super T, ? super U> cons) {
+        if (first != null && second != null) cons.accept(first, second);
+    }
+
+    public boolean equals(Object obj) {
+        if (this == obj) return true;
+        if (obj == null || getClass() != obj.getClass()) return false;
+        Pair<?, ?> pair = (Pair<?, ?>) obj;
+        return Objects.equals(first, pair.first) && Objects.equals(second, pair.second);
+    }
+
+    public int hashCode() {
+        return Objects.hash(first, second);
+    }
 }

task01/src/com/example/task01/Task01Main.java

@@ -5,10 +5,6 @@
 
 public class Task01Main {
     public static void main(String[] args) throws IOException {
-
-        // TODO С корректно реализованным классом Pair должен компилироваться и успешно работать следующий код:
-
-        /*
         Pair<Integer, String> pair = Pair.of(1, "hello");
         Integer i = pair.getFirst(); // 1
         String s = pair.getSecond(); // "hello"
@@ -21,8 +17,9 @@ public static void main(String[] args) throws IOException {
         Pair<Integer, String> pair2 = Pair.of(1, "hello");
         boolean mustBeTrue = pair.equals(pair2); // true!
         boolean mustAlsoBeTrue = pair.hashCode() == pair2.hashCode(); // true!
-        */
 
+        System.out.println(mustBeTrue);
+        System.out.println(mustAlsoBeTrue);
     }
 
 }

task02/src/com/example/task02/SavedList.java

@@ -1,35 +1,64 @@
 package com.example.task02;
 
-import java.io.File;
-import java.io.Serializable;
+import java.io.*;
 import java.util.AbstractList;
+import java.util.ArrayList;
 
 public class SavedList<E extends Serializable> extends AbstractList<E> {
+    private final AbstractList<E> list = new ArrayList<>();
+    private final File file;
 
     public SavedList(File file) {
+        this.file = file;
+        readFromFile();
     }
 
     @Override
     public E get(int index) {
-        return null;
+        return list.get(index);
     }
 
     @Override
     public E set(int index, E element) {
-        return null;
+        E e = list.set(index, element);
+        writeToFile();
+        return e;
     }
 
     @Override
     public int size() {
-        return 0;
+        return list.size();
     }
 
     @Override
     public void add(int index, E element) {
+        list.add(index, element);
+        writeToFile();
     }
 
     @Override
     public E remove(int index) {
-        return null;
+        E e = list.remove(index);
+        writeToFile();
+        return e;
+    }
+
+    public void readFromFile() {
+        ArrayList<E> loadList;
+        try (ObjectInputStream inputStream = new ObjectInputStream(new FileInputStream(file))) {
+            loadList = (ArrayList<E>) inputStream.readObject();
+            list.clear();
+            list.addAll(loadList);
+        } catch (IOException | ClassNotFoundException e) {
+            e.getStackTrace();
+        }
+    }
+
+    public void writeToFile() {
+        try (ObjectOutputStream outputStream = new ObjectOutputStream(new FileOutputStream(file))) {
+            outputStream.writeObject(list);
+        } catch (IOException e) {
+            e.getStackTrace();
+        }
     }
 }

task03/src/com/example/task03/Task03Main.java

@@ -1,24 +1,63 @@
 package com.example.task03;
 
-import java.io.FileInputStream;
-import java.io.IOException;
-import java.io.InputStream;
+import java.io.*;
 import java.nio.charset.Charset;
-import java.util.List;
-import java.util.Set;
+import java.util.*;
 
 public class Task03Main {
 
     public static void main(String[] args) throws IOException {
 
         List<Set<String>> anagrams = findAnagrams(new FileInputStream("task03/resources/singular.txt"), Charset.forName("windows-1251"));
+
         for (Set<String> anagram : anagrams) {
             System.out.println(anagram);
         }
 
     }
 
     public static List<Set<String>> findAnagrams(InputStream inputStream, Charset charset) {
-        return null;
+
+        Map<String, Set<String>> groups = new HashMap<>();
+        List<Set<String>> words = new ArrayList<>();
+
+        try (BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream, charset))) {
+
+            String line;
+
+            while ((line = reader.readLine()) != null) {
+
+                line = line.toLowerCase();
+
+                if (line.matches("[а-яё]{4,}")) {
+
+                    char[] arr = line.toCharArray();
+                    Arrays.sort(arr);
+                    String key = new String(arr);
+
+                    if (!groups.containsKey(key)) {
+                        groups.put(key, new TreeSet<>());
+                    }
+
+                    groups.get(key).add(line);
+                }
+            }
+        } catch (IOException e) {
+            e.getStackTrace();
+        }
+
+        for (Set<String> check : groups.values()) {
+            if (check.size() >= 2) {
+                words.add(check);
+            }
+        }
+
+        words.sort((a, b) -> {
+            String firstA = a.iterator().next();
+            String firstB = b.iterator().next();
+            return firstA.compareTo(firstB);
+        });
+
+        return words;
     }
 }