From 7c0ecf5e8b72b85d8e70705c9552fe7d0a6f8fe2 Mon Sep 17 00:00:00 2001 From: Polovko Ivan Date: Fri, 24 Apr 2026 18:00:12 +0200 Subject: [PATCH 1/2] done --- .../java/practice/CandidateValidator.java | 23 +++++++++- src/main/java/practice/StreamPractice.java | 44 ++++++++++++++++--- 2 files changed, 58 insertions(+), 9 deletions(-) diff --git a/src/main/java/practice/CandidateValidator.java b/src/main/java/practice/CandidateValidator.java index 8d2e56c0e..b6d0bdffc 100644 --- a/src/main/java/practice/CandidateValidator.java +++ b/src/main/java/practice/CandidateValidator.java @@ -1,5 +1,24 @@ package practice; -public class CandidateValidator { - //write your code here +import java.util.function.Predicate; +import model.Candidate; + +public class CandidateValidator implements Predicate { + private static final int MIN_AGE = 35; + private static final int MIN_YEARS_IN_UKRAINE = 10; + private static final String REQUIRED_NATIONALITY = "Ukrainian"; + + @Override + public boolean test(Candidate candidate) { + String[] years = candidate.getPeriodsInUkr().split("-"); + int startYear = Integer.parseInt(years[0]); + int endYear = Integer.parseInt(years[1]); + int yearInUkraine = endYear - startYear; + + return candidate.getAge() >= MIN_AGE + && candidate.isAllowedToVote() + && candidate.getNationality().equals(REQUIRED_NATIONALITY) + && yearInUkraine >= MIN_YEARS_IN_UKRAINE; + + } } diff --git a/src/main/java/practice/StreamPractice.java b/src/main/java/practice/StreamPractice.java index 57b1ca2e2..46b456945 100644 --- a/src/main/java/practice/StreamPractice.java +++ b/src/main/java/practice/StreamPractice.java @@ -1,8 +1,11 @@ package practice; -import java.util.Collections; +import java.util.Arrays; import java.util.List; +import java.util.NoSuchElementException; +import java.util.stream.IntStream; import model.Candidate; +import model.Cat; import model.Person; public class StreamPractice { @@ -14,7 +17,13 @@ public class StreamPractice { * "Can't get min value from list: < Here is our input 'numbers' >" */ public int findMinEvenNumber(List numbers) { - return 0; + return numbers.stream() + .flatMap(s -> Arrays.stream(s.split(","))) + .mapToInt(Integer::parseInt) + .filter(n -> n % 2 == 0) + .min() + .orElseThrow(() -> new RuntimeException( + "Can't get min value from list:" + numbers)); } /** @@ -23,7 +32,13 @@ public int findMinEvenNumber(List numbers) { * But before that subtract 1 from each element on an odd position (having the odd index). */ public Double getOddNumsAverage(List numbers) { - return 0D; + return IntStream.range(0, numbers.size()) + .map(i -> i % 2 != 0 + ? numbers.get(i) - 1 + : numbers.get(i)) + .filter(n -> n % 2 != 0) + .average() + .orElseThrow(() -> new NoSuchElementException()); } /** @@ -35,7 +50,10 @@ public Double getOddNumsAverage(List numbers) { * Example: select men who can be recruited to army (from 18 to 27 years old inclusively). */ public List selectMenByAge(List peopleList, int fromAge, int toAge) { - return Collections.emptyList(); + return peopleList.stream() + .filter(p -> p.getSex() == Person.Sex.MAN + && p.getAge() >= fromAge && p.getAge() <= toAge) + .toList(); } /** @@ -50,7 +68,11 @@ public List selectMenByAge(List peopleList, int fromAge, int toA */ public List getWorkablePeople(int fromAge, int femaleToAge, int maleToAge, List peopleList) { - return Collections.emptyList(); + return peopleList.stream() + .filter(p -> p.getAge() >= fromAge) + .filter(p -> (p.getSex() == Person.Sex.MAN && p.getAge() <= maleToAge) + || (p.getSex() == Person.Sex.WOMAN && p.getAge() <= femaleToAge)) + .toList(); } /** @@ -59,7 +81,11 @@ public List getWorkablePeople(int fromAge, int femaleToAge, * return the names of all cats whose owners are women from `femaleAge` years old inclusively. */ public List getCatsNames(List peopleList, int femaleAge) { - return Collections.emptyList(); + return peopleList.stream() + .filter(p -> p.getSex() == Person.Sex.WOMAN && p.getAge() > femaleAge) + .flatMap(p -> p.getCats().stream()) + .map(Cat::getName) + .toList(); } /** @@ -75,6 +101,10 @@ public List getCatsNames(List peopleList, int femaleAge) { * parametrized with Candidate in CandidateValidator. */ public List validateCandidates(List candidates) { - return Collections.emptyList(); + return candidates.stream() + .filter(new CandidateValidator()) + .map(Candidate::getName) + .sorted() + .toList(); } } From f35d55d635df63b0283bfcb82bfd1d0df5ffea7b Mon Sep 17 00:00:00 2001 From: Polovko Ivan Date: Sat, 25 Apr 2026 18:17:50 +0200 Subject: [PATCH 2/2] fixed problems --- src/main/java/practice/StreamPractice.java | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/src/main/java/practice/StreamPractice.java b/src/main/java/practice/StreamPractice.java index 46b456945..3027b8bc0 100644 --- a/src/main/java/practice/StreamPractice.java +++ b/src/main/java/practice/StreamPractice.java @@ -18,12 +18,12 @@ public class StreamPractice { */ public int findMinEvenNumber(List numbers) { return numbers.stream() - .flatMap(s -> Arrays.stream(s.split(","))) + .flatMap(s -> Arrays.stream(s.split(",\s*"))) .mapToInt(Integer::parseInt) .filter(n -> n % 2 == 0) .min() .orElseThrow(() -> new RuntimeException( - "Can't get min value from list:" + numbers)); + "Can't get min value from list: " + numbers)); } /** @@ -51,8 +51,8 @@ public Double getOddNumsAverage(List numbers) { */ public List selectMenByAge(List peopleList, int fromAge, int toAge) { return peopleList.stream() - .filter(p -> p.getSex() == Person.Sex.MAN - && p.getAge() >= fromAge && p.getAge() <= toAge) + .filter(p -> Person.Sex.MAN.equals(p.getSex()) + && p.getAge() >= fromAge && p.getAge() <= toAge) .toList(); } @@ -70,8 +70,8 @@ public List getWorkablePeople(int fromAge, int femaleToAge, int maleToAge, List peopleList) { return peopleList.stream() .filter(p -> p.getAge() >= fromAge) - .filter(p -> (p.getSex() == Person.Sex.MAN && p.getAge() <= maleToAge) - || (p.getSex() == Person.Sex.WOMAN && p.getAge() <= femaleToAge)) + .filter(p -> (Person.Sex.MAN.equals(p.getSex()) && p.getAge() <= maleToAge) + || (Person.Sex.WOMAN.equals(p.getSex()) && p.getAge() <= femaleToAge)) .toList(); } @@ -82,7 +82,7 @@ public List getWorkablePeople(int fromAge, int femaleToAge, */ public List getCatsNames(List peopleList, int femaleAge) { return peopleList.stream() - .filter(p -> p.getSex() == Person.Sex.WOMAN && p.getAge() > femaleAge) + .filter(p -> Person.Sex.WOMAN.equals(p.getSex()) && p.getAge() >= femaleAge) .flatMap(p -> p.getCats().stream()) .map(Cat::getName) .toList();