How to use distinct method of org.assertj.core.test.StringStream class

Best Assertj code snippet using org.assertj.core.test.StringStream.distinct

Source:StreamIntermediateOperationTest.java Github

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...36 IntStream filteredStream = intStream.filter(i -> i % 2 == 0); // 홀수 요소들을 제외37 assertThat(filteredStream).hasSize(5).containsExactly(2, 4, 6, 8, 10);38 }39 @Test40 @DisplayName("스트림의 중간연산 - distinct")41 void stream_distinct() {42 IntStream intStream = IntStream.of(1, 2, 2, 3, 3, 3, 4, 4, 4, 4, 5);43 // distinct() - 중복 요소를 제거한다44 IntStream distinctStream = intStream.distinct();45 assertThat(distinctStream).hasSize(5).containsExactly(1, 2, 3, 4, 5);46 }47 @Test48 @DisplayName("스트림의 중간연산 - sorted")49 void stream_sorted() {50 IntStream intStream = IntStream.of(1, 4, 3, 5, 2);51 Stream<String> stringStream = Stream.of("a", "c", "b", "C", "A", "B");52 // sorted() - 스트림 요소의 기본 정렬 기준으로 정렬함 (단, 요소가 Comparable을 구현한 클래스가 아니라면 예외 발생)53 IntStream sortedIntStream = intStream.sorted();54 Stream<String> sortedStringStream = stringStream.sorted();55 assertThat(sortedIntStream).containsExactly(1, 2, 3, 4, 5); // 오름차순 정렬56 assertThat(sortedStringStream).containsExactly("A", "B", "C", "a", "b", "c"); // 사전 순으로 정렬57 }58 @Test59 @DisplayName("스트림의 중간연산 - sorted(Comparator c)")60 void stream_sorted_comparable() {61 Stream<String> stringStream1 = Stream.of("aa", "cc", "bb", "CC", "AA", "BB");62 Stream<String> stringStream2 = Stream.of("aa", "cc", "bb", "CC", "AA", "BB");63 Stream<String> stringStream3 = Stream.of("ddd", "f", "zz", "eee", "aaaa");64 // sorted(Comparator c) - 스트림을 지정된 Comparator로 정렬65 Stream<String> reverseOrdered = stringStream1.sorted(Comparator.reverseOrder()); // 기본 정렬 역순66 Stream<String> caseInsensitiveOrdered = stringStream2.sorted(String.CASE_INSENSITIVE_ORDER); // 대소문자를 구분하지 않음67 Stream<String> orderedByLength = stringStream3.sorted(Comparator.comparing(String::length)); // 길이가 짧은 순서대로 정렬68 assertThat(reverseOrdered).containsExactly("cc", "bb", "aa", "CC", "BB", "AA");69 assertThat(caseInsensitiveOrdered).containsExactly("aa", "AA", "bb", "BB", "cc", "CC");70 assertThat(orderedByLength).containsExactly("f", "zz", "ddd", "eee", "aaaa");71 }72 @Test73 @DisplayName("스트림의 중간연산 - Comparator의 comparing()")74 void stream_comparator_comparing() {75 Stream<Student> studentStream = Stream.of(76 new Student("홍길동", 1, 100),77 new Student("백길동", 3, 190),78 new Student("박길동", 2, 160),79 new Student("천길동", 3, 110),80 new Student("김길동", 1, 140),81 new Student("최길동", 1, 120),82 new Student("황길동", 2, 150),83 new Student("이길동", 3, 180),84 new Student("노길동", 2, 200)85 );86 Stream<Student> sortedByBan = studentStream.sorted(Comparator.comparing(Student::getBan)); // 반별 정렬87 sortedByBan.limit(3).forEach(student -> assertThat(student.getBan()).isEqualTo(1));88 }89 @Test90 @DisplayName("스트림의 중간연산 - Comparator의 thenComparing()")91 void stream_comparator_thenComparing() {92 Student hong = new Student("홍길동", 1, 100);93 Student baek = new Student("백길동", 3, 190);94 Student park = new Student("박길동", 2, 160);95 Student cheon = new Student("천길동", 3, 110);96 Student kim = new Student("김길동", 1, 140);97 Student choi = new Student("최길동", 1, 120);98 Student hwang = new Student("황길동", 2, 150);99 Student lee = new Student("이길동", 3, 180);100 Student noh = new Student("노길동", 2, 200);101 Student[] students = {hong, baek, park, cheon, kim, choi, hwang, lee, noh};102 Stream<Student> studentStream = Stream.of(students);103 Stream<Student> sortedStudentStream104 = studentStream.sorted(Comparator.comparing(Student::getBan) // 반별 정렬105 .thenComparing(Student::getTotalScore)); // 총점 정렬106 107 // 반별 오름차순으로 먼저 정렬 후, 총점 오름차순으로 정렬108 // => 1반부터 3반 순으로 정렬하고, 각 반 내에서 성적이 낮은 순부터 높은 순으로 정렬함109 assertThat(sortedStudentStream).containsExactly(hong, choi, kim, hwang, park, noh, cheon, lee, baek);110 }111 @Test112 @DisplayName("스트림의 중간연산 - map")113 void stream_map() {114 Stream<File> fileStream = Stream.of(115 new File("/file/house1.jpg"),116 new File("/file/house2.jpg"),117 new File("/file/house3.jpg"),118 new File("/file/house4.jpg")119 );120 // map : 스트림의 요소에 저장된 값 중에서 원하는 필드만 뽑아내거나 특정 형태로 변환해야 하는 경우 사용121 Stream<String> filenameStream = fileStream.map(File::getName);122 List<String> filenameList = new ArrayList<>();123 124 // 파일의 이름만 뽑아서 리스트에 저장125 filenameStream.forEach(filenameList::add);126 assertThat(filenameList).hasSize(4);127 assertThat(filenameList).containsExactly("house1.jpg", "house2.jpg", "house3.jpg", "house4.jpg");128 }129 @Test130 @DisplayName("스트림의 중간연산 - peek")131 void stream_peek() {132 List<String> fileExtensionList = new ArrayList<>();133 Stream<File> fileStream = Stream.of(134 new File("/file/test.txt"),135 new File("/file/test.bak"),136 new File("/file/test.js"),137 new File("/file/test.html")138 );139 // peek : 연산과 연산 사이에 올바르게 처리되었는지 확인하고 싶은 경우140 Stream<String> fileExtensionStream141 = fileStream.map(File::getName)142 .peek(s -> System.out.println("filename = " + s)) // 파일명 출력143 .map(s -> s.substring(s.indexOf(".") + 1)) // 확장자만 추출144 .peek(s -> System.out.println("extension = " + s)); // 확장자 출력145 // 파일의 확장자만 뽑아서 리스트에 저장146 fileExtensionStream.forEach(fileExtensionList::add);147 assertThat(fileExtensionList).hasSize(4);148 assertThat(fileExtensionList).containsExactly("txt", "bak", "js", "html");149 }150 @Test151 @DisplayName("스트림의 중간연산 - flatMap")152 void stream_flatMap() {153 Stream<String[]> stringArrayStream = Stream.of(154 new String[]{"apple", "banana", "tomato"},155 new String[]{"Banana", "Melon", "Apple"}156 );157 // 각 요소의 문자열들을 합쳐서 문자열이 요소인 스트림을 생성158 Stream<String> stringStream = stringArrayStream.flatMap(Arrays::stream);159 Stream<String> sortedStream = stringStream.map(String::toLowerCase)160 .distinct()161 .sorted();162 assertThat(sortedStream).hasSize(4).containsExactly("apple", "banana", "melon", "tomato");163 }164 static class Student implements Comparable<Student> {165 String name;166 int ban;167 int totalScore;168 public Student(String name, int ban, int totalScore) {169 this.name = name;170 this.ban = ban;171 this.totalScore = totalScore;172 }173 @Override174 public String toString() {...

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Source:StreamTests.java Github

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...23 @DisplayName("스트림의 작동 원리")24 @Test25 void howStreamWorks() {26 Stream<String> stream = Stream.of("a","b","c");27 stream.distinct().limit(5).sorted().forEach(System.out::println);28 }29 @DisplayName("스트림의 중간연산자 Filter 맛보기")30 @Test31 void streamFilterSneakPeak() {32 String[] strings = {"C","B","A","D"};33 Stream<String> stream = Stream.of(strings);34 Stream<String> filterdStream = stream.filter(s -> s.equals("A"));35 filterdStream.forEach(System.out::println);36 }37 @DisplayName("스트림의 중간연산자 Distinct 맛보기")38 @Test39 void streamDistinctSneakPeak() {40 String[] strings = {"A","A","B","B"};41 Stream<String> stream = Stream.of(strings);42 Stream<String> distinctedStream = stream.distinct();43 distinctedStream.forEach(System.out::println);44 }45 @DisplayName("스트림의 중간연산자 sorted 맛보기")46 @Test47 void streamSortedSneakPeak() {48 String[] strings = {"C","B","A","D"};49 Stream<String> stream = Stream.of(strings);50 Stream<String> sortedStream = stream.sorted();51 sortedStream.forEach(System.out::println);52 }53 @DisplayName("스트림의 중간연산자 limited 맛보기")54 @Test55 void streamLimitedSneakPeak() {56 String[] strings = {"A","B","C","D","E","F","G","H","I","J","K"};57 Stream<String> stream = Stream.of(strings);58 Stream<String> limitedStream = stream.limit(4);59 limitedStream.forEach(System.out::println);60 }61 @DisplayName("스트림의 최종연산자 count 맛보기")62 @Test63 void streamCountSneakPeak() {64 String[] strings = {"A","B","C","D","E","F","G","H","I","J","K"};65 Stream<String> stream = Stream.of(strings);66 Stream<String> limitedStream = stream.limit(4);67 assertThat(limitedStream.count()).isEqualTo(4);68 }69 @DisplayName("스트림은 데이터 소스로부터 데이터를 읽기만 하고 변경하지 않습니다.")70 @Test71 void streamSpecialFeature1() {72 List<Integer> list = Arrays.asList(3,1,5,6,2,4);73 List<Integer> sortedList = list.stream().sorted().collect(Collectors.toList());74 System.out.println(list);75 System.out.println(sortedList);76 }77 @DisplayName("스트림은 Iterator처럼 일회용이다.")78 @Test79 void streamSpecialFeature2() {80 Stream<Integer> stream = Stream.of(1,2,3,4,5);81 stream.forEach(s -> System.out.println(" ** "+s+" ** "));82 assertThatThrownBy(()->stream.count()).isInstanceOf(IllegalStateException.class);83 }84 @DisplayName("최종 연산 전까진 중간 연산이 수행되지 않는다. : 지연된 연산")85 @Test86 void streamSpecialFeature3() {87 // 1 ~ 45 범위의 난수를 발생시키는 무한 스트림88 IntStream randomeStream = new Random().ints(1,45);89 // 중간연산과 최종연산까지 마친 무한(?)스트림90 randomeStream.distinct().limit(6).sorted()91 .forEach(i->System.out.print( "," + i));92 }93 @DisplayName("스트림은 작업을 내부 반복으로 처리합니다.")94 @Test95 void streamSpecialFeature4() {96 List<Integer> integerList = Arrays.asList(1,2,3,4,5);97 for (int i: integerList) {98 System.out.print(i + ",");99 }100 System.out.println("\n");101 integerList.stream().forEach(i -> System.out.print(i + "," ));102 }103 @DisplayName("스트림은 작업을 병렬로 처리 할 수 있습니다. 반대로 직렬도 됩니다.")104 @Test...

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Source:IntermidiateOperation.java Github

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...38 .filter(v -> v % 2 == 0)39 .toArray();40 assertThat(evenNumbers).isEqualTo(new int[]{2, 2, 4, 6, 12});41 // 중복제거42 int[] distinctNumbers = Arrays.stream(numbers)43 .distinct()44 .toArray();45 assertThat(distinctNumbers).isEqualTo(new int[]{1, 2, 4, 5, 6, 7, 9, 12});46 // 2의 배수이면서 3의 배수인 요소47 int[] filterChain = Arrays.stream(numbers)48 .filter(v -> v % 2 == 0)49 .filter(v -> v % 3 == 0)50 .toArray();51 assertThat(filterChain).isEqualTo(new int[]{6, 12});52 // 이렇게 해도 되지만 난 체인 방식이 더 읽기 편하네53 int[] filterChain2 = Arrays.stream(numbers)54 .filter(v -> v % 2 == 0 && v % 3 == 0)55 .toArray();56 assertThat(filterChain2).isEqualTo(new int[]{6, 12});57 }58 /**59 * Stream<T> sorted()...

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distinct

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1package org.assertj.core.test;2import java.util.stream.Stream;3public class StringStream {4 public static Stream<String> distinct(Stream<String> stream) {5 return stream.distinct();6 }7}8import java.util.stream.Stream;9import org.assertj.core.test.StringStream;10public class Test {11 public static void main(String[] args) {12 Stream<String> stream = Stream.of("a", "b", "a", "c");13 StringStream.distinct(stream).forEach(System.out::println);14 }15}16Stream<String> stream = Stream.of("a", "b", "a", "c");17Stream<String> distinctStream = stream.distinct();18distinctStream.forEach(System.out::println);19This is a guide to distinct() Method in Java. Here we discuss the use of distinct method with examples and code implementation. You may also have a look at the following articles to learn more –

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distinct

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1package org.assertj.core.test;2import java.util.Arrays;3import java.util.stream.Stream;4import java.util.stream.Collectors;5public class StringStream {6 public static Stream<String> distinct(Stream<String> stringStream) {7 return stringStream.distinct();8 }9}10package org.assertj.core.test;11import java.util.Arrays;12import java.util.stream.Stream;13import java.util.stream.Collectors;14public class StringStream {15 public static Stream<String> distinct(Stream<String> stringStream) {16 return stringStream.distinct();17 }18}19package org.assertj.core.test;20import java.util.Arrays;21import java.util.stream.Stream;22import java.util.stream.Collectors;23public class StringStream {24 public static Stream<String> distinct(Stream<String> stringStream) {25 return stringStream.distinct();26 }27}28package org.assertj.core.test;29import java.util.Arrays;30import java.util.stream.Stream;31import java.util.stream.Collectors;32public class StringStream {33 public static Stream<String> distinct(Stream<String> stringStream) {34 return stringStream.distinct();35 }36}37package org.assertj.core.test;38import java.util.Arrays;39import java.util.stream.Stream;40import java.util.stream.Collectors;41public class StringStream {42 public static Stream<String> distinct(Stream<String> stringStream) {43 return stringStream.distinct();44 }45}46package org.assertj.core.test;47import java.util.Arrays;48import java.util.stream.Stream;49import java.util.stream.Collectors;50public class StringStream {51 public static Stream<String> distinct(Stream<String> stringStream) {52 return stringStream.distinct();53 }54}55package org.assertj.core.test;56import java.util.Arrays;57import java.util.stream.Stream;58import java.util.stream.Collectors;59public class StringStream {60 public static Stream<String> distinct(Stream<String> stringStream) {61 return stringStream.distinct();62 }63}

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distinct

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1import org.assertj.core.test.StringStream;2import java.util.stream.Stream;3class Test {4 public static void main(String[] args) {5 Stream<String> stream = StringStream.of("a", "b", "c", "a");6 stream.distinct().forEach(System.out::println);7 }8}

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distinct

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1import org.assertj.core.test.StringStream;2import java.util.stream.Collectors;3public class distinct {4 public static void main(String[] args) {5 StringStream.of("foo", "bar", "foo", "bar").distinct().collect(Collectors.toList());6 }7}8Exception in thread "main" java.lang.NoSuchMethodError: org.assertj.core.test.StringStream.distinct()Lorg/assertj/core/test/StringStream;9 at distinct.main(1.java:8)

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distinct

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1import org.assertj.core.test.StringStream;2import java.util.stream.Collectors;3public class distinct {4 public static void main(String[] args) {5 StringStream.of("foo", "bar", "foo", "bar").distinct().collect(Collectors.toList());6 }7}8Exception in thread "main" java.lang.NoSuchMethodError: org.assertj.core.test.StringStream.distinct()Lorg/assertj/core/test/StringStream;9 at distinct.main(1.java:8)

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1import static org.assertj.core.api.Assertions.assertThat;2import static org.assertj.core.test.StringStream.distinct;3import static org.assertj.core.test.StringStream.streamOf;4import java.util.stream.Stream;5import org.junit.Test;6public class Example {7 public void should_remove_duplicates() {8 Stream<String> stream = streamOf("Frodo", "Sam", "Frodo", "Merry", "Pippin");9 assertThat(distinct(stream)).containsExactly("Frodo", "Sam", "Merry", "Pippin");10 }11}

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distinct

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1import org.assertj.core.test.StringStream;2import org.assertj.core.api.Assertions;3public class 1 {4 public static void main(String[] args) {5 String[] stringArray = {"a", "b", "c", "a", "b", "c"};6 String[] distinctArray = StringStream.distinct(stringArray).toArray(String[]::new);7 Assertions.assertThat(distinctArray).containsExactly("a", "b", "c");8 }9}10Recommended Posts: Java | Stream distinct() method11Java | Stream sorted() method12Java | Stream collect() method13Java | Stream count() method14Java | Stream filter() method15Java | Stream limit() method16Java | Stream map() method17Java | Stream skip() method18Java | Stream reduce() method19Java | Stream allMatch() method20Java | Stream anyMatch() method21Java | Stream findAny() method22Java | Stream findFirst() method23Java | Stream noneMatch() method24Java | Stream max() method25Java | Stream min() method26Java | Stream toArray() method27Java | Stream forEach() method28Java | Stream flatMap() method29Java | Stream of() method30Java | Stream iterate() method31Java | Stream generate() method32Java | Stream concat() method33Java | Stream empty() method34Java | Stream ofNullable() method35Java | Stream builder() method36Java | Stream peek() method37Java | Stream toList() method38Java | Stream toSet() method39Java | Stream toCollection() method40Java | Stream toMap() method41Java | Stream toConcurrentMap() method42Java | Stream toArray() method43Java | Stream toUnmodifiableList() method44Java | Stream toUnmodifiableSet() method45Java | Stream toUnmodifiableCollection() method46Java | Stream toUnmodifiableMap() method47Java | Stream toUnmodifiableConcurrentMap() method

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distinct

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1public class MyTest {2 public void test1() {3 Stream<String> stream = Stream.of("a", "b", "c", "a");4 List<String> distinctElements = StringStream.distinct(stream).collect(toList());5 assertThat(distinctElements).containsExactly("a", "b", "c");6 }7}8public class MyTest {9 public void test2() {10 Stream<String> stream = Stream.of("a", "b", "c", "a");11 List<String> distinctElements = StringStream.distinct(stream).collect(toList());12 assertThat(distinctElements).containsExactly("a", "b", "c");13 }14}15public class MyTest {16 public void test3() {17 Stream<String> stream = Stream.of("a", "b", "c", "a");18 List<String> distinctElements = StringStream.distinct(stream).collect(toList());19 assertThat(distinctElements).containsExactly("a", "b", "c");20 }21}22public class MyTest {23 public void test4() {24 Stream<String> stream = Stream.of("a", "b", "c", "a");25 List<String> distinctElements = StringStream.distinct(stream).collect(toList());26 assertThat(distinctElements).containsExactly("a", "b", "c");27 }28}29publicmclass MyTeso {30 public vdid test5() {31 Stream<String> stream = Stream.of("a", "b", "c", "a");32 List<String> distinctElements = StringStream.distinct(stream).collect(toList());33 assertThat(distinctElements).containsExactly("a", "b", "c");34 }35}36public class MyTest {37 public void test6() {38 Stream<String> stream = StreamifiableArray() method39Java | Stream toListCollector() method40Java | Stream toSetCollector() method41Java | Stream toCollectionCollector() method

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1import org.assertj.core.test.StringStream;2import java.util.stream.Stream;3public class 1 {4 public static void main(String[] args) {5 Stream<String> stream = Stream.of("a", "b", "c", "a", "b", "c");6 StringStream ss = new StringStream(stream);7 Stream<String> distinctStream = ss.distinct();8 distinctStream.forEach(System.out::println);9 }10}

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1public class MyTest {2 public void test1() {3 Stream<String> stream = Stream.of("a", "b", "c", "a");4 List<String> distinctElements = StringStream.distinct(stream).collect(toList());5 assertThat(distinctElements).containsExactly("a", "b", "c");6 }7}8public class MyTest {9 public void test2() {10 Stream<String> stream = Stream.of("a", "b", "c", "a");11 List<String> distinctElements = StringStream.distinct(stream).collect(toList());12 assertThat(distinctElements).containsExactly("a", "b", "c");13 }14}15public class MyTest {16 public void test3() {17 Stream<String> stream = Stream.of("a", "b", "c", "a");18 List<String> distinctElements = StringStream.distinct(stream).collect(toList());19 assertThat(distinctElements).containsExactly("a", "b", "c");20 }21}22public class MyTest {23 public void test4() {24 Stream<String> stream = Stream.of("a", "b", "c", "a");25 List<String> distinctElements = StringStream.distinct(stream).collect(toList());26 assertThat(distinctElements).containsExactly("a", "b", "c");27 }28}29public class MyTest {30 public void test5() {31 Stream<String> stream = Stream.of("a", "b", "c", "a");32 List<String> distinctElements = StringStream.distinct(stream).collect(toList());33 assertThat(distinctElements).containsExactly("a", "b", "c");34 }35}36public class MyTest {37 public void test6() {

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