diff --git a/task01/src/com/example/task01/Task01Main.java b/task01/src/com/example/task01/Task01Main.java index de4599c1..9071fc16 100644 --- a/task01/src/com/example/task01/Task01Main.java +++ b/task01/src/com/example/task01/Task01Main.java @@ -1,6 +1,7 @@ package com.example.task01; import java.io.IOException; +import java.util.Objects; import java.util.function.Function; import java.util.function.Predicate; @@ -9,12 +10,12 @@ public static void main(String[] args) throws IOException { // TODO С корректно реализованным методом ternaryOperator должен компилироваться и успешно работать следующий код: - /* Predicate condition = Objects::isNull; Function ifTrue = obj -> 0; Function ifFalse = CharSequence::length; Function safeStringLength = ternaryOperator(condition, ifTrue, ifFalse); - */ + System.out.println(safeStringLength.apply(null)); + System.out.println(safeStringLength.apply("null")); } @@ -23,7 +24,7 @@ public static Function ternaryOperator( Function ifTrue, Function ifFalse) { - return null; // your implementation here - + if(condition == null || ifTrue == null || ifFalse == null) throw new NullPointerException(); + return t -> condition.test(t) ? ifTrue.apply(t) : ifFalse.apply(t); } } diff --git a/task02/src/com/example/task02/Task02Main.java b/task02/src/com/example/task02/Task02Main.java index 309260d8..185072f1 100644 --- a/task02/src/com/example/task02/Task02Main.java +++ b/task02/src/com/example/task02/Task02Main.java @@ -6,17 +6,17 @@ public class Task02Main { public static void main(String[] args) { - /* cycleGrayCode(2) .limit(10) .forEach(System.out::println); - */ } public static IntStream cycleGrayCode(int n) { - - return null; // your implementation here + int max = 1 << n; // 2^n + if(n > 16 || n < 1) + throw new IllegalArgumentException(); + return IntStream.iterate(0, i -> (i + 1) % max).map( i -> i ^ (i >> 1)); } diff --git a/task03/src/com/example/task03/Task03Main.java b/task03/src/com/example/task03/Task03Main.java index 254d5cb0..de39e1e1 100644 --- a/task03/src/com/example/task03/Task03Main.java +++ b/task03/src/com/example/task03/Task03Main.java @@ -1,7 +1,11 @@ package com.example.task03; import java.util.Comparator; +import java.util.Iterator; +import java.util.List; +import java.util.Optional; import java.util.function.BiConsumer; +import java.util.stream.Collectors; import java.util.stream.Stream; public class Task03Main { @@ -22,6 +26,22 @@ public static void findMinMax( Comparator order, BiConsumer minMaxConsumer) { - // your implementation here + + Iterator it = stream.iterator(); + if (!it.hasNext()) { + minMaxConsumer.accept(null, null); + return; + } + + T minN = it.next(); + T maxN = minN; + + while (it.hasNext()) { + T val = it.next(); + if (order.compare(val, minN) < 0) minN = val; + if (order.compare(val, maxN) > 0) maxN = val; + } + + minMaxConsumer.accept(minN, maxN); } } diff --git a/task04/src/com/example/task04/Task04Main.java b/task04/src/com/example/task04/Task04Main.java index 1e38e6eb..2ab207b1 100644 --- a/task04/src/com/example/task04/Task04Main.java +++ b/task04/src/com/example/task04/Task04Main.java @@ -1,11 +1,34 @@ package com.example.task04; +import java.io.BufferedReader; +import java.io.IOException; +import java.io.InputStreamReader; +import java.util.Map; +import java.util.stream.Collectors; + public class Task04Main { - public static void main(String[] args) { + public static void main(String[] args) throws IOException { + try (BufferedReader reader = new BufferedReader( + new InputStreamReader(System.in, "UTF-8"))) { - // your implementation here + String text = reader.lines().collect(Collectors.joining(" ")); - } + String result = java.util.Arrays.stream(text.split("[^\\p{L}\\p{Digit}]+")) + .filter(word -> !word.isEmpty()) + .map(String::toLowerCase) + .collect(Collectors.groupingBy(w -> w, Collectors.counting())) + .entrySet() + .stream() + .sorted( + Map.Entry.comparingByValue().reversed() + .thenComparing(Map.Entry.comparingByKey()) + ) + .limit(10) + .map(Map.Entry::getKey) + .collect(Collectors.joining("\n")); -} + System.out.println(result); + } + } +} \ No newline at end of file diff --git a/task05/src/com/example/task05/MailItem.java b/task05/src/com/example/task05/MailItem.java new file mode 100644 index 00000000..90a2fe9d --- /dev/null +++ b/task05/src/com/example/task05/MailItem.java @@ -0,0 +1,7 @@ +package com.example.task05; + +public interface MailItem { + String getFrom(); + String getTo(); + T getContent(); +} diff --git a/task05/src/com/example/task05/MailMessage.java b/task05/src/com/example/task05/MailMessage.java new file mode 100644 index 00000000..0ab5d315 --- /dev/null +++ b/task05/src/com/example/task05/MailMessage.java @@ -0,0 +1,28 @@ +package com.example.task05; + +public class MailMessage implements MailItem{ + + private final String from; + private final String to; + private final String content; + public MailMessage(String from, String to, String content) { + this.from = from; + this.to = to; + this.content = content; + } + + @Override + public String getFrom() { + return from; + } + + @Override + public String getTo() { + return to; + } + + @Override + public String getContent() { + return content; + } +} diff --git a/task05/src/com/example/task05/MailService.java b/task05/src/com/example/task05/MailService.java new file mode 100644 index 00000000..9f5e6b46 --- /dev/null +++ b/task05/src/com/example/task05/MailService.java @@ -0,0 +1,31 @@ +package com.example.task05; + +import java.util.*; +import java.util.function.Consumer; + +public class MailService implements Consumer> { + private final Map> mailBox = new HashMap<>(); + + @Override + public void accept(MailItem mailItem) { + if (mailItem == null) return; + String to = mailItem.getTo(); + T content = mailItem.getContent(); + if (to == null || content == null) return; + mailBox.computeIfAbsent(to, k -> new ArrayList<>()).add(content); + } + + public Map> getMailBox() { + return new AbstractMap>() { + @Override + public Set>> entrySet() { + return mailBox.entrySet(); + } + @Override + public List get(Object key) { + List list = mailBox.get(key); + return list != null ? list : Collections.emptyList(); + } + }; + } +} \ No newline at end of file diff --git a/task05/src/com/example/task05/Salary.java b/task05/src/com/example/task05/Salary.java new file mode 100644 index 00000000..677885bd --- /dev/null +++ b/task05/src/com/example/task05/Salary.java @@ -0,0 +1,30 @@ +package com.example.task05; + +public class Salary implements MailItem { + + private final String from; + private final String to; + private final Integer amount; + + + public Salary(String from, String to, Integer amount) { + this.from = from; + this.to = to; + this.amount = amount; + } + + @Override + public String getFrom() { + return from; + } + + @Override + public String getTo() { + return to; + } + + @Override + public Integer getContent() { + return amount; + } +} diff --git a/task05/src/com/example/task05/Task05Main.java b/task05/src/com/example/task05/Task05Main.java index ae31f6bc..5f5f53cb 100644 --- a/task05/src/com/example/task05/Task05Main.java +++ b/task05/src/com/example/task05/Task05Main.java @@ -9,12 +9,11 @@ public class Task05Main { public static void main(String[] args) { - /* // Random variables - String randomFrom = "..."; // Некоторая случайная строка. Можете выбрать ее самостоятельно. - String randomTo = "..."; // Некоторая случайная строка. Можете выбрать ее самостоятельно. - int randomSalary = 100; // Некоторое случайное целое положительное число. Можете выбрать его самостоятельно. + String randomFrom = "Дед мороз"; // Некоторая случайная строка. Можете выбрать ее самостоятельно. + String randomTo = "Пери Утконос"; // Некоторая случайная строка. Можете выбрать ее самостоятельно. + int randomSalary = 1005; // Некоторое случайное целое положительное число. Можете выбрать его самостоятельно. // Создание списка из трех почтовых сообщений. MailMessage firstMessage = new MailMessage( @@ -87,8 +86,23 @@ public static void main(String[] args) { assert salaries.get(salary2.getTo()).equals(Arrays.asList(Integer.MAX_VALUE)) : "wrong salaries mailbox content (2)"; assert salaries.get(randomTo).equals(Arrays.asList(randomSalary)) : "wrong salaries mailbox content (3)"; - - */ + System.out.println("Сообщения:"); + mailBox = mailService.getMailBox(); + for (Map.Entry> entry : mailBox.entrySet()) { + System.out.println(" Получатель: " + entry.getKey()); + for (String msg : entry.getValue()) { + System.out.println(" - " + msg); + } + } + + System.out.println("\nЗарплаты:"); + salaries = salaryService.getMailBox(); + for (Map.Entry> entry : salaries.entrySet()) { + System.out.println(" Получатель: " + entry.getKey()); + for (Integer salary : entry.getValue()) { + System.out.println(" - " + salary); + } + } }