From e9328b7ffd1cbb92478838ebd6df411ae1adde57 Mon Sep 17 00:00:00 2001 From: Anna Date: Fri, 14 Mar 2025 20:01:45 +0500 Subject: [PATCH] =?UTF-8?q?=D0=9A=D0=BE=D0=BD=D0=BE=D0=BF=D0=BB=D1=91?= =?UTF-8?q?=D0=B2=D0=B0?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- task01/src/com/example/task01/Pair.java | 41 ++++++++++++++++++- task01/src/com/example/task01/Task01Main.java | 6 ++- task02/src/com/example/task02/SavedList.java | 37 +++++++++++++---- task03/src/com/example/task03/Task03Main.java | 27 +++++++++--- 4 files changed, 93 insertions(+), 18 deletions(-) diff --git a/task01/src/com/example/task01/Pair.java b/task01/src/com/example/task01/Pair.java index f6fb603b..0ed1d4f3 100644 --- a/task01/src/com/example/task01/Pair.java +++ b/task01/src/com/example/task01/Pair.java @@ -1,5 +1,42 @@ package com.example.task01; -public class Pair { - // TODO напишите реализацию +import java.util.Objects; +import java.util.function.BiConsumer; +public class Pair { + private final F FirstValue; + private final S SecondValue; + + private Pair(F firstValue, S secondValue) { + FirstValue = firstValue; + SecondValue = secondValue; + } + + public static Pair of(F firstValue, S secondValue) { + return new Pair<>(firstValue, secondValue); + } + + public F getFirst() { + return FirstValue; + } + + public S getSecond() { + return SecondValue; + } + + public void ifPresent(BiConsumer biConsumer) { + if (FirstValue != null && SecondValue != null) biConsumer.accept(FirstValue, SecondValue); + } + + @Override + public boolean equals(Object obj) { + if (this == obj) return true; + if (obj == null || this.getClass() != obj.getClass()) return false; + Pair pair = (Pair) obj; + return Objects.equals(FirstValue, pair.FirstValue) && Objects.equals(SecondValue, pair.SecondValue); + } + + @Override + public int hashCode() { + return Objects.hash(FirstValue, SecondValue); + } } diff --git a/task01/src/com/example/task01/Task01Main.java b/task01/src/com/example/task01/Task01Main.java index 54dde94f..de567be8 100644 --- a/task01/src/com/example/task01/Task01Main.java +++ b/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 pair = Pair.of(1, "hello"); Integer i = pair.getFirst(); // 1 String s = pair.getSecond(); // "hello" @@ -21,7 +21,9 @@ public static void main(String[] args) throws IOException { Pair 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); + } diff --git a/task02/src/com/example/task02/SavedList.java b/task02/src/com/example/task02/SavedList.java index 6b3a037d..4e931b5a 100644 --- a/task02/src/com/example/task02/SavedList.java +++ b/task02/src/com/example/task02/SavedList.java @@ -1,35 +1,56 @@ package com.example.task02; -import java.io.File; -import java.io.Serializable; +import java.io.*; import java.util.AbstractList; +import java.util.ArrayList; +import java.util.List; public class SavedList extends AbstractList { + private final File file; + private List list; public SavedList(File file) { + this.file = file; + if (file.exists()) { + try (ObjectInputStream is = new ObjectInputStream(new FileInputStream(file))) { + list = (ArrayList) is.readObject(); + } catch (Exception ignored) { } + } else { + list = new ArrayList<>(); + } } @Override public E get(int index) { - return null; + return list.get(index); } @Override public E set(int index, E element) { - return null; + E el = list.set(index, element); + writeFile(); + return el; } @Override - public int size() { - return 0; - } + public int size() {return list.size();} @Override public void add(int index, E element) { + list.add(index, element); + writeFile(); } @Override public E remove(int index) { - return null; + E el = list.remove(index); + writeFile(); + return el; + } + private void writeFile() { + try (ObjectOutputStream obj = new ObjectOutputStream(new FileOutputStream(file))) { + obj.writeObject(list); + } catch (IOException ignored) { + } } } diff --git a/task03/src/com/example/task03/Task03Main.java b/task03/src/com/example/task03/Task03Main.java index 7f255e98..2d66a70b 100644 --- a/task03/src/com/example/task03/Task03Main.java +++ b/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 { @@ -19,6 +17,23 @@ public static void main(String[] args) throws IOException { } public static List> findAnagrams(InputStream inputStream, Charset charset) { - return null; + Map> result = new TreeMap<>(); + try (BufferedReader br = new BufferedReader(new InputStreamReader(inputStream, charset))) { + List entries = br.lines() + .map(String::toLowerCase) + .filter(x -> x.matches("[а-яё]+") && x.length() >= 3) + .collect(Collectors.toList()); + for (String s : entries) { + char[] symbols = s.toCharArray(); + Arrays.sort(symbols); + String key = new String(symbols); + result.computeIfAbsent(key, a -> new TreeSet<>()).add(s); + } + } catch (IOException ignored) { } + return result.values() + .stream() + .filter(x -> x.size() >= 2) + .collect(Collectors.toList()); } + }