Кузьменков ПрИ201

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

@@ -1,5 +1,39 @@
 package com.example.task01;
 
-public class Pair {
+import java.util.Objects;
+import java.util.function.BiConsumer;
+
+public class Pair<F, S> {
+    private final F first;
+    private final S second;
+    private Pair(F first, S second){
+        this.first = first;
+        this.second = second;
+    }
+    public static <F, S> Pair<F, S> of(F first, S second){
+        return new Pair<F, S>(first, second);
+    }
+    public F getFirst() {
+        return first;
+    }
+    public S getSecond() {
+        return second;
+    }
+    public boolean equals(Object obj){
+        if (this == obj)
+            return true;
+        if (obj == null || getClass() != obj.getClass())
+            return false;
+        Pair<?, ?> another = (Pair<?, ?>)obj;
+        return Objects.equals(this.first, another.first) && Objects.equals(this.second, another.second);
+    }
+    public int hashCode(){
+        return Objects.hash(first, second);
+    }
+    public void ifPresent(BiConsumer<? super F, ? super S> operation){
+        if(first != null && second != null){
+            operation.accept(first, second);
+        }
+    }
     // TODO напишите реализацию
 }

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

@@ -8,7 +8,7 @@ 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"
@@ -21,7 +21,7 @@ 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!
-        */
+
 
     }
 

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

@@ -1,35 +1,67 @@
 package com.example.task02;
 
-import java.io.File;
-import java.io.Serializable;
+import java.io.*;
+import java.nio.file.Files;
 import java.util.AbstractList;
+import java.util.ArrayList;
 
 public class SavedList<E extends Serializable> extends AbstractList<E> {
+    private final ArrayList<E> list = new ArrayList<>();
+    private final File file;
 
     public SavedList(File file) {
+        this.file = file;
+        getData();
+    }
+
+    private void getData(){
+        if (!file.exists()) {
+            return;
+        }
+        try(ObjectInputStream objIS = new ObjectInputStream(Files.newInputStream(file.toPath()))){
+            ArrayList<E> data = (ArrayList<E>) objIS.readObject();
+            list.addAll(data);
+        }catch (ClassNotFoundException | IOException e){
+            throw new RuntimeException("Error in getting data from file!", e);
+        }
+    }
+
+    private void saveData(){
+        try(ObjectOutputStream objOS = new ObjectOutputStream(Files.newOutputStream(file.toPath()))){
+            objOS.writeObject(list);
+        }
+        catch (IOException e){
+            throw new RuntimeException("Error in setting data to file!", e);
+        }
     }
 
     @Override
     public E get(int index) {
-        return null;
+        return list.get(index);
     }
 
     @Override
     public E set(int index, E element) {
-        return null;
+        E oldElement = list.set(index, element);
+        saveData();
+        return oldElement;
     }
 
     @Override
     public int size() {
-        return 0;
+        return list.size();
     }
 
     @Override
     public void add(int index, E element) {
+        list.add(index, element);
+        saveData();
     }
 
     @Override
     public E remove(int index) {
-        return null;
+        E removedElement = list.remove(index);
+        saveData();
+        return removedElement;
     }
 }

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

@@ -1,11 +1,9 @@
 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.*;
+import java.util.stream.Collectors;
 
 public class Task03Main {
 
@@ -15,10 +13,27 @@ public static void main(String[] args) throws IOException {
         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>> result = new TreeMap<>();
+        try(BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream, charset))){
+            reader.lines()
+                    .map(String::toLowerCase)
+                    .filter(word -> word.matches("[а-яё]+") && word.length() >= 3)
+                    .forEach(word ->{
+                        String sorted = word.chars()
+                                .sorted()
+                                .mapToObj(c -> String.valueOf((char)c))
+                                .collect(Collectors.joining());
+                        result.computeIfAbsent(sorted, key -> new TreeSet<>()).add(word);
+                    });
+        }catch (IOException e) {
+            throw new RuntimeException("Somethings wrong", e);
+        }
+        return result.values().stream()
+                .filter(group -> group.size() >= 2)
+                .collect(Collectors.toList());
+        //return null;
     }
 }