From d705b777cb0d7c875dbdf4742ba53b16b1284d1a Mon Sep 17 00:00:00 2001 From: jasperin Date: Thu, 12 Dec 2024 20:19:53 +0500 Subject: [PATCH] add --- task01/src/com/example/task01/Task01Main.java | 12 ++++--- task02/src/com/example/task02/Task02Main.java | 10 +++--- task03/src/com/example/task03/Task03Main.java | 27 ++++++++++++-- task04/src/com/example/task04/Task04Main.java | 26 +++++++++++--- .../src/com/example/task05/MailMessage.java | 25 +++++++++++++ .../src/com/example/task05/MailService.java | 35 +++++++++++++++++++ task05/src/com/example/task05/Message.java | 9 +++++ task05/src/com/example/task05/Salary.java | 28 +++++++++++++++ task05/src/com/example/task05/Task05Main.java | 6 ---- 9 files changed, 157 insertions(+), 21 deletions(-) create mode 100644 task05/src/com/example/task05/MailMessage.java create mode 100644 task05/src/com/example/task05/MailService.java create mode 100644 task05/src/com/example/task05/Message.java create mode 100644 task05/src/com/example/task05/Salary.java diff --git a/task01/src/com/example/task01/Task01Main.java b/task01/src/com/example/task01/Task01Main.java index de4599c1..76967c8d 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 +10,11 @@ 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); - */ + } @@ -23,7 +23,11 @@ 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); } -} +} \ No newline at end of file diff --git a/task02/src/com/example/task02/Task02Main.java b/task02/src/com/example/task02/Task02Main.java index 309260d8..2586be7d 100644 --- a/task02/src/com/example/task02/Task02Main.java +++ b/task02/src/com/example/task02/Task02Main.java @@ -15,9 +15,11 @@ public static void main(String[] args) { } public static IntStream cycleGrayCode(int n) { - - return null; // your implementation here - + if (n < 1 || n > 16) throw new IllegalArgumentException(); + return IntStream.iterate(0, i -> i + 1).map(i -> grayCodeFromBinary(i % (int) Math.pow(2, n))); } -} + public static int grayCodeFromBinary(int g) { + return g ^ (g >> 1); + } +} \ No newline at end of file diff --git a/task03/src/com/example/task03/Task03Main.java b/task03/src/com/example/task03/Task03Main.java index 254d5cb0..8672d738 100644 --- a/task03/src/com/example/task03/Task03Main.java +++ b/task03/src/com/example/task03/Task03Main.java @@ -1,6 +1,7 @@ package com.example.task03; import java.util.Comparator; +import java.util.Iterator; import java.util.function.BiConsumer; import java.util.stream.Stream; @@ -22,6 +23,28 @@ public static void findMinMax( Comparator order, BiConsumer minMaxConsumer) { - // your implementation here + if (stream == null || order == null || minMaxConsumer == null) { + throw new NullPointerException(); + } + + Iterator iterator = stream.iterator(); + + if (!iterator.hasNext()) { + minMaxConsumer.accept(null, null); + } else { + T min = iterator.next(); + T max = min; + + while (iterator.hasNext()) { + T current = iterator.next(); + if (order.compare(current, min) < 0) { + min = current; + } else if (order.compare(current, max) > 0) { + max = current; + } + } + + minMaxConsumer.accept(min, max); + } } -} +} \ No newline at end of file diff --git a/task04/src/com/example/task04/Task04Main.java b/task04/src/com/example/task04/Task04Main.java index 1e38e6eb..f6630adb 100644 --- a/task04/src/com/example/task04/Task04Main.java +++ b/task04/src/com/example/task04/Task04Main.java @@ -1,11 +1,27 @@ package com.example.task04; +import java.io.BufferedReader; +import java.io.InputStreamReader; +import java.util.Comparator; +import java.util.Map; +import java.util.stream.Collectors; +import java.util.stream.Stream; + public class Task04Main { public static void main(String[] args) { - - // your implementation here - + BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); + reader.lines() + .flatMap(x -> Stream.of(x.split("\\P{L}")) + .filter(t -> !t.isEmpty()) + .map(String::toLowerCase)) + .collect(Collectors.groupingBy(t -> t, Collectors.counting())) + .entrySet() + .stream() + .sorted(Map.Entry.comparingByKey()) + .sorted(Map.Entry.comparingByValue(Comparator.reverseOrder())) + .limit(10) + .map(Map.Entry::getKey) + .forEach(t -> System.out.print(t + '\n')); } - -} +} \ No newline at end of file diff --git a/task05/src/com/example/task05/MailMessage.java b/task05/src/com/example/task05/MailMessage.java new file mode 100644 index 00000000..7070d6a9 --- /dev/null +++ b/task05/src/com/example/task05/MailMessage.java @@ -0,0 +1,25 @@ +package com.example.task05; + +public class MailMessage implements Message { + private String from; + private String to; + private String content; + + public MailMessage(String from, String to, String content) { + this.from = from; + this.to = to; + this.content = content; + } + + public String getFrom() { + return from; + } + + public String getTo() { + return to; + } + + public String getContent() { + return content; + } +} \ No newline at end of file diff --git a/task05/src/com/example/task05/MailService.java b/task05/src/com/example/task05/MailService.java new file mode 100644 index 00000000..585f6814 --- /dev/null +++ b/task05/src/com/example/task05/MailService.java @@ -0,0 +1,35 @@ +package com.example.task05; + +import java.util.ArrayList; +import java.util.HashMap; +import java.util.List; +import java.util.function.Consumer; + +public class MailService implements Consumer> { + HashMap> mailBox = new HashMap>() { + + @Override + public List get(Object key) { + return super.get(key) == null ? new ArrayList<>() : super.get(key); + } + }; + + public MailService() { + + } + + public HashMap> getMailBox() { + return mailBox; + } + + @Override + public void accept(Message message) { + if (!mailBox.containsKey(message.getTo())) { + mailBox.put(message.getTo(), new ArrayList<>()); + mailBox.get(message.getTo()).add(message.getContent()); + } else { + mailBox.get(message.getTo()).add(message.getContent()); + } + } + +} \ No newline at end of file diff --git a/task05/src/com/example/task05/Message.java b/task05/src/com/example/task05/Message.java new file mode 100644 index 00000000..85b845d8 --- /dev/null +++ b/task05/src/com/example/task05/Message.java @@ -0,0 +1,9 @@ +package com.example.task05; + +public interface Message { + String getFrom(); + + String getTo(); + + T getContent(); +} \ 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..0bea5789 --- /dev/null +++ b/task05/src/com/example/task05/Salary.java @@ -0,0 +1,28 @@ +package com.example.task05; + +public class Salary implements Message { + private String from; + private String to; + private Integer content; + + public Salary(String from, String to, Integer content) { + this.from = from; + this.to = to; + this.content = content; + } + + @Override + public String getFrom() { + return from; + } + + @Override + public String getTo() { + return to; + } + + @Override + public Integer getContent() { + return content; + } +} \ No newline at end of file diff --git a/task05/src/com/example/task05/Task05Main.java b/task05/src/com/example/task05/Task05Main.java index ae31f6bc..a85bcf1e 100644 --- a/task05/src/com/example/task05/Task05Main.java +++ b/task05/src/com/example/task05/Task05Main.java @@ -9,8 +9,6 @@ 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. @@ -86,10 +84,6 @@ public static void main(String[] args) { assert salaries.get(salary1.getTo()).equals(Arrays.asList(1)) : "wrong salaries mailbox content (1)"; 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)"; - - - */ - } }