From 54b0a8be13af01daa344f67eadb4077333bc9962 Mon Sep 17 00:00:00 2001 From: Maksym Date: Sun, 21 Jun 2026 21:28:37 +0300 Subject: [PATCH 1/5] Maksym Gorodnychyi --- .../java/practice/CandidateValidator.java | 23 ++++++++- src/main/java/practice/StreamPractice.java | 48 ++++++++++++++++--- 2 files changed, 62 insertions(+), 9 deletions(-) diff --git a/src/main/java/practice/CandidateValidator.java b/src/main/java/practice/CandidateValidator.java index 8d2e56c0e..0fa90cbc2 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 model.Candidate; + +import java.util.function.Predicate; + +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 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 yearsInUkraine = endYear - startYear; + return candidate.getAge() > MIN_AGE + && candidate.isAllowedToVote() + && NATIONALITY.equals(candidate.getNationality()) + && yearsInUkraine >= MIN_YEARS_IN_UKRAINE; + } + } diff --git a/src/main/java/practice/StreamPractice.java b/src/main/java/practice/StreamPractice.java index 57b1ca2e2..09adb25aa 100644 --- a/src/main/java/practice/StreamPractice.java +++ b/src/main/java/practice/StreamPractice.java @@ -1,8 +1,12 @@ package practice; -import java.util.Collections; +import java.util.Arrays; import java.util.List; +import java.util.stream.Collectors; +import java.util.stream.IntStream; + import model.Candidate; +import model.Cat; import model.Person; public class StreamPractice { @@ -14,7 +18,14 @@ 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() + .map(a -> a.split(",")) + .flatMap(Arrays::stream) + .mapToInt(Integer::parseInt) + .filter(r -> (r % 2) == 0) + .min() + .orElseThrow(() -> new RuntimeException("Can't get min value from list: " + numbers)); + } /** @@ -23,7 +34,11 @@ 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 & 1) == 1 ? numbers.get(i) - 1 : numbers.get(i)) + .filter(n -> (n & 1) == 1) + .average() + .orElseThrow(); } /** @@ -35,7 +50,11 @@ 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) + .collect(Collectors.toList()); } /** @@ -50,7 +69,10 @@ 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 + && p.getAge() <= (p.getSex() == Person.Sex.MAN ? maleToAge : femaleToAge)) + .collect(Collectors.toList()); } /** @@ -59,7 +81,13 @@ 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(w -> w.getSex() == Person.Sex.WOMAN + && w.getAge() >= femaleAge) + .flatMap(p -> p.getCats().stream()) + .map(Cat::getName) + .collect(Collectors.toList()); + } /** @@ -75,6 +103,12 @@ public List getCatsNames(List peopleList, int femaleAge) { * parametrized with Candidate in CandidateValidator. */ public List validateCandidates(List candidates) { - return Collections.emptyList(); + CandidateValidator candidateValidator = new CandidateValidator(); + return candidates.stream() + .filter(candidateValidator::test) + .map(Candidate::getName) + .sorted() + .collect(Collectors.toList()); + } } From 4dba690759acccb287a985d3afcbf738f373a98b Mon Sep 17 00:00:00 2001 From: Maksym Date: Sun, 21 Jun 2026 21:34:38 +0300 Subject: [PATCH 2/5] Maksym Gorodnychyi --- src/main/java/practice/CandidateValidator.java | 3 +-- src/main/java/practice/StreamPractice.java | 4 ---- 2 files changed, 1 insertion(+), 6 deletions(-) diff --git a/src/main/java/practice/CandidateValidator.java b/src/main/java/practice/CandidateValidator.java index 0fa90cbc2..9d8747130 100644 --- a/src/main/java/practice/CandidateValidator.java +++ b/src/main/java/practice/CandidateValidator.java @@ -1,7 +1,6 @@ package practice; import model.Candidate; - import java.util.function.Predicate; public class CandidateValidator implements Predicate { @@ -15,7 +14,7 @@ public boolean test(Candidate candidate) { int startYear = Integer.parseInt(years[0]); int endYear = Integer.parseInt(years[1]); int yearsInUkraine = endYear - startYear; - return candidate.getAge() > MIN_AGE + return candidate.getAge() >= MIN_AGE && candidate.isAllowedToVote() && NATIONALITY.equals(candidate.getNationality()) && yearsInUkraine >= MIN_YEARS_IN_UKRAINE; diff --git a/src/main/java/practice/StreamPractice.java b/src/main/java/practice/StreamPractice.java index 09adb25aa..ca5872760 100644 --- a/src/main/java/practice/StreamPractice.java +++ b/src/main/java/practice/StreamPractice.java @@ -4,7 +4,6 @@ import java.util.List; import java.util.stream.Collectors; import java.util.stream.IntStream; - import model.Candidate; import model.Cat; import model.Person; @@ -25,7 +24,6 @@ public int findMinEvenNumber(List numbers) { .filter(r -> (r % 2) == 0) .min() .orElseThrow(() -> new RuntimeException("Can't get min value from list: " + numbers)); - } /** @@ -87,7 +85,6 @@ public List getCatsNames(List peopleList, int femaleAge) { .flatMap(p -> p.getCats().stream()) .map(Cat::getName) .collect(Collectors.toList()); - } /** @@ -109,6 +106,5 @@ public List validateCandidates(List candidates) { .map(Candidate::getName) .sorted() .collect(Collectors.toList()); - } } From a3ea43a5bbf7d9a4d66d55b0198774f869941270 Mon Sep 17 00:00:00 2001 From: Maksym Date: Sun, 21 Jun 2026 21:42:45 +0300 Subject: [PATCH 3/5] Maksym Gorodnychyi --- src/main/java/practice/StreamPractice.java | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/src/main/java/practice/StreamPractice.java b/src/main/java/practice/StreamPractice.java index ca5872760..7c6ce4b3f 100644 --- a/src/main/java/practice/StreamPractice.java +++ b/src/main/java/practice/StreamPractice.java @@ -4,6 +4,7 @@ import java.util.List; import java.util.stream.Collectors; import java.util.stream.IntStream; + import model.Candidate; import model.Cat; import model.Person; @@ -33,8 +34,8 @@ public int findMinEvenNumber(List numbers) { */ public Double getOddNumsAverage(List numbers) { return IntStream.range(0, numbers.size()) - .map(i -> (i & 1) == 1 ? numbers.get(i) - 1 : numbers.get(i)) - .filter(n -> (n & 1) == 1) + .map(i -> (i % 2) != 0 ? numbers.get(i) - 1 : numbers.get(i)) + .filter(n -> (n % 2) != 0) .average() .orElseThrow(); } From 11c0407adefa5c9dccfca7fed41ebc859cf746a6 Mon Sep 17 00:00:00 2001 From: Maksym Date: Sun, 21 Jun 2026 21:49:52 +0300 Subject: [PATCH 4/5] Maksym Gorodnychyi --- src/main/java/practice/CandidateValidator.java | 2 +- src/main/java/practice/StreamPractice.java | 3 ++- 2 files changed, 3 insertions(+), 2 deletions(-) diff --git a/src/main/java/practice/CandidateValidator.java b/src/main/java/practice/CandidateValidator.java index 9d8747130..3f38da736 100644 --- a/src/main/java/practice/CandidateValidator.java +++ b/src/main/java/practice/CandidateValidator.java @@ -1,7 +1,7 @@ package practice; -import model.Candidate; import java.util.function.Predicate; +import model.Candidate; public class CandidateValidator implements Predicate { private static final int MIN_AGE = 35; diff --git a/src/main/java/practice/StreamPractice.java b/src/main/java/practice/StreamPractice.java index 7c6ce4b3f..15d93e24d 100644 --- a/src/main/java/practice/StreamPractice.java +++ b/src/main/java/practice/StreamPractice.java @@ -24,7 +24,8 @@ public int findMinEvenNumber(List numbers) { .mapToInt(Integer::parseInt) .filter(r -> (r % 2) == 0) .min() - .orElseThrow(() -> new RuntimeException("Can't get min value from list: " + numbers)); + .orElseThrow(() -> new RuntimeException("Can't get min value from list: " + + numbers)); } /** From 10bf0db2a224f80b42d6ab15218459f6ea0950a4 Mon Sep 17 00:00:00 2001 From: Maksym Date: Thu, 25 Jun 2026 16:49:14 +0300 Subject: [PATCH 5/5] Maksym Gorodnychyi --- src/main/java/practice/StreamPractice.java | 1 - 1 file changed, 1 deletion(-) diff --git a/src/main/java/practice/StreamPractice.java b/src/main/java/practice/StreamPractice.java index 15d93e24d..587f25fb8 100644 --- a/src/main/java/practice/StreamPractice.java +++ b/src/main/java/practice/StreamPractice.java @@ -4,7 +4,6 @@ import java.util.List; import java.util.stream.Collectors; import java.util.stream.IntStream; - import model.Candidate; import model.Cat; import model.Person;