Merge pull request #34 from cwiki-us-docs/code_bank

ArrayList and List
2022-04-16 08:45:59 -04:00
parent 7cae38ad9f cb5ea25333
commit 4bdec0a84d
653 changed files with 29031 additions and 186 deletions
@@ -6,15 +6,69 @@
        <sourceOutputDir name="target/generated-sources/annotations" />
        <sourceTestOutputDir name="target/generated-test-sources/test-annotations" />
        <outputRelativeToContentRoot value="true" />
+        <module name="jmh" />
+        <module name="assertion-libraries" />
+        <module name="cucumber" />
+        <module name="core-java-annotations" />
+        <module name="jackson-simple" />
+        <module name="spring-testing-2" />
+        <module name="test-containers" />
+        <module name="mockserver" />
+        <module name="spring-testing" />
+        <module name="xml" />
+        <module name="core-java-datetime-conversion" />
+        <module name="testing-libraries" />
+        <module name="mocks" />
+        <module name="load-testing-comparison" />
+        <module name="junit-5-basics" />
+        <module name="mockito-2" />
+        <module name="testing-assertions" />
+        <module name="easymock" />
+        <module name="core-java-collections-list" />
+        <module name="junit5-migration" />
+        <module name="core-java-io" />
+        <module name="easy-random" />
+        <module name="junit-5" />
+        <module name="junit-4" />
+        <module name="junit-5-advanced" />
+        <module name="rest-testing" />
+        <module name="jackson-exceptions" />
+        <module name="core-java-8" />
+        <module name="jackson-conversions" />
+        <module name="math-test-functions" />
+        <module name="java-numbers-2" />
+        <module name="jackson-annotations" />
+        <module name="java-numbers" />
+        <module name="mockito" />
+        <module name="jackson" />
+        <module name="groovy-spock" />
+        <module name="jackson-conversions-2" />
        <module name="codebank" />
+        <module name="selenium-junit-testng" />
+        <module name="junit5-annotations" />
+        <module name="mockito-3" />
+        <module name="powermock" />
+        <module name="zerocode" />
+        <module name="gatling" />
        <module name="discourse" />
+        <module name="rest-assured" />
+        <module name="jackson-custom-conversions" />
+        <module name="testing-libraries-2" />
+        <module name="string-test-functions" />
+        <module name="xmlunit-2" />
+        <module name="testng" />
+        <module name="hamcrest" />
      </profile>
    </annotationProcessing>
-    <bytecodeTargetLevel>
-      <module name="codebank" target="11" />
-      <module name="discourse" target="11" />
-      <module name="parent-modules" target="11" />
-      <module name="toolkits" target="1.5" />
-    </bytecodeTargetLevel>
+  </component>
+  <component name="JavacSettings">
+    <option name="ADDITIONAL_OPTIONS_OVERRIDE">
+      <module name="codebank" options="" />
+      <module name="discourse" options="" />
+      <module name="java-numbers" options="" />
+      <module name="java-numbers-2" options="" />
+      <module name="jmh" options="--add-exports java.base/jdk.internal.vm.annotation=ALL-UNNAMED" />
+      <module name="xml" options="" />
+    </option>
  </component>
 </project>
@@ -1,9 +1,64 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
  <component name="Encoding">
+    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-8/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-8/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-annotations/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-annotations/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-collections-list/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-collections-list/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-datetime-conversion/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-datetime-conversion/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-io/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-io/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/core-java-modules/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/core-java-modules/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/jackson-modules/jackson-annotations/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/jackson-modules/jackson-annotations/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/jackson-modules/jackson-conversions-2/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/jackson-modules/jackson-conversions-2/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/jackson-modules/jackson-conversions/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/jackson-modules/jackson-conversions/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/jackson-modules/jackson-custom-conversions/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/jackson-modules/jackson-custom-conversions/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/jackson-modules/jackson-exceptions/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/jackson-modules/jackson-exceptions/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/jackson-modules/jackson/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/jackson-modules/jackson/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/jackson-modules/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/jackson-modules/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/jackson-simple/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/jackson-simple/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/parent-java/java-numbers-2/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/parent-java/java-numbers-2/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/parent-java/java-numbers/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/parent-java/java-numbers/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/parent-java/jmh/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/parent-java/jmh/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/parent-java/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/parent-java/src/main/resources" charset="UTF-8" />
    <file url="file://$PROJECT_DIR$/src/main/java" charset="UTF-8" />
    <file url="file://$PROJECT_DIR$/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/testing-modules/easy-random/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/testing-modules/easy-random/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/testing-modules/junit-5-basics/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/testing-modules/junit-5-basics/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/testing-modules/junit-5-basics/src/test/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/testing-modules/mockito-2/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/testing-modules/mockito-2/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/testing-modules/mockserver/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/testing-modules/mockserver/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/testing-modules/rest-testing/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/testing-modules/rest-testing/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/testing-modules/spring-testing/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/testing-modules/spring-testing/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/testing-modules/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/testing-modules/src/main/resources" charset="UTF-8" />
    <file url="file://$PROJECT_DIR$/toolkits/codebank/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/toolkits/codebank/src/main/resources" charset="UTF-8" />
    <file url="file://$PROJECT_DIR$/toolkits/discourse/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/toolkits/discourse/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/xml/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/xml/src/main/resources" charset="UTF-8" />
  </component>
 </project>
@@ -6,6 +6,11 @@
      <option name="name" value="Central Repository" />
      <option name="url" value="https://repo.maven.apache.org/maven2" />
    </remote-repository>
+    <remote-repository>
+      <option name="id" value="m2-ossez-com-m2" />
+      <option name="name" value="m2-ossez-com-m2" />
+      <option name="url" value="https://m2-ossez-com-206755003006.d.codeartifact.us-east-2.amazonaws.com/maven/m2/" />
+    </remote-repository>
    <remote-repository>
      <option name="id" value="central" />
      <option name="name" value="Maven Central repository" />
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="JpaBuddyIdeaProjectConfig">
+    <option name="defaultUnitInitialized" value="true" />
+  </component>
+</project>
@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
+  <component name="ExternalStorageConfigurationManager" enabled="true" />
  <component name="MavenProjectsManager">
    <option name="originalFiles">
      <list>
@@ -1,11 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="ProjectModuleManager">
-    <modules>
-      <module fileurl="file://$PROJECT_DIR$/toolkits/codebank/codebank.iml" filepath="$PROJECT_DIR$/toolkits/codebank/codebank.iml" />
-      <module fileurl="file://$PROJECT_DIR$/toolkits/discourse/discourse.iml" filepath="$PROJECT_DIR$/toolkits/discourse/discourse.iml" />
-      <module fileurl="file://$PROJECT_DIR$/parent-modules.iml" filepath="$PROJECT_DIR$/parent-modules.iml" />
-      <module fileurl="file://$PROJECT_DIR$/toolkits/toolkits.iml" filepath="$PROJECT_DIR$/toolkits/toolkits.iml" />
-    </modules>
-  </component>
-</project>
@@ -0,0 +1,26 @@
+*.class
+
+0.*
+
+#folders#
+/target
+/neoDb*
+/data
+/src/main/webapp/WEB-INF/classes
+*/META-INF/*
+.resourceCache
+
+# Packaged files #
+*.jar
+*.war
+*.ear
+
+# Files generated by integration tests
+*.txt
+backup-pom.xml
+/bin/
+/temp
+
+#IntelliJ specific
+.idea/
+*.iml
@@ -0,0 +1,15 @@
+## Core Java 8
+
+This module contains articles about Java 8 core features
+
+### Relevant Articles: 
+- [New Features in Java 8](https://www.baeldung.com/java-8-new-features)
+- [Guide to Java 8 groupingBy Collector](https://www.baeldung.com/java-groupingby-collector)
+- [Strategy Design Pattern in Java 8](https://www.baeldung.com/java-strategy-pattern)
+- [Guide to Java 8 Comparator.comparing()](https://www.baeldung.com/java-8-comparator-comparing)
+- [Guide to the Java 8 forEach](https://www.baeldung.com/foreach-java)
+- [Introduction to Spliterator in Java](https://www.baeldung.com/java-spliterator)
+- [Finding Min/Max in an Array with Java](https://www.baeldung.com/java-array-min-max)
+- [Internationalization and Localization in Java 8](https://www.baeldung.com/java-8-localization)
+- [Generalized Target-Type Inference in Java](https://www.baeldung.com/java-generalized-target-type-inference)
+- [[More -->]](/core-java-modules/core-java-8-2)
@@ -0,0 +1,55 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>core-java-8</artifactId>
+    <version>0.1.0-SNAPSHOT</version>
+    <name>core-java-8</name>
+    <packaging>jar</packaging>
+
+    <parent>
+        <groupId>com.ossez.core-java-modules</groupId>
+        <artifactId>core-java-modules</artifactId>
+        <version>0.0.2-SNAPSHOT</version>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-collections4</artifactId>
+            <version>${commons-collections4.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <version>${lombok.version}</version>
+            <scope>provided</scope>
+        </dependency>
+        <!-- test scoped -->
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <version>${assertj.version}</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <finalName>core-java-8</finalName>
+        <resources>
+            <resource>
+                <directory>src/main/resources</directory>
+                <filtering>true</filtering>
+            </resource>
+        </resources>
+    </build>
+
+    <properties>
+        <!-- util -->
+        <commons-collections4.version>4.1</commons-collections4.version>
+        <!-- testing -->
+        <assertj.version>3.6.1</assertj.version>
+    </properties>
+
+</project>
@@ -0,0 +1,9 @@
+package com.baeldung.aspect;
+
+public aspect ChangeCallsToCurrentTimeInMillisMethod {
+    long around():
+            call(public static native long java.lang.System.currentTimeMillis())
+                    && within(user.code.base.pckg.*) {
+        return 0;
+    }
+}
@@ -0,0 +1,14 @@
+package com.ossez.java_8_features;
+
+public class Address {
+
+    private String street;
+
+    public String getStreet() {
+        return street;
+    }
+
+    public void setStreet(String street) {
+        this.street = street;
+    }
+}
@@ -0,0 +1,4 @@
+package com.ossez.java_8_features;
+
+public class CustomException extends RuntimeException {
+}
@@ -0,0 +1,16 @@
+package com.ossez.java_8_features;
+
+import java.util.Optional;
+
+public class OptionalAddress {
+
+    private String street;
+
+    public Optional<String> getStreet() {
+        return Optional.ofNullable(street);
+    }
+
+    public void setStreet(String street) {
+        this.street = street;
+    }
+}
@@ -0,0 +1,16 @@
+package com.ossez.java_8_features;
+
+import java.util.Optional;
+
+public class OptionalUser {
+
+    private OptionalAddress address;
+
+    public Optional<OptionalAddress> getAddress() {
+        return Optional.of(address);
+    }
+
+    public void setAddress(OptionalAddress address) {
+        this.address = address;
+    }
+}
@@ -0,0 +1,40 @@
+package com.ossez.java_8_features;
+
+import java.util.Optional;
+
+public class User {
+
+    private String name;
+
+    private Address address;
+
+    public Address getAddress() {
+        return address;
+    }
+
+    public void setAddress(Address address) {
+        this.address = address;
+    }
+
+    public User() {
+    }
+
+    public User(String name) {
+        this.name = name;
+    }
+
+    public static boolean isRealUser(User user) {
+        return true;
+    }
+
+    public String getOrThrow() {
+        String value = null;
+        Optional<String> valueOpt = Optional.ofNullable(value);
+        String result = valueOpt.orElseThrow(CustomException::new).toUpperCase();
+        return result;
+    }
+
+    public boolean isLegalName(String name) {
+        return name.length() > 3 && name.length() < 16;
+    }
+}
@@ -0,0 +1,18 @@
+package com.ossez.java_8_features;
+
+public interface Vehicle {
+
+    void moveTo(long altitude, long longitude);
+
+    static String producer() {
+        return "N&F Vehicles";
+    }
+
+    default long[] startPosition() {
+        return new long[] { 23, 15 };
+    }
+
+    default String getOverview() {
+        return "ATV made by " + producer();
+    }
+}
@@ -0,0 +1,9 @@
+package com.ossez.java_8_features;
+
+public class VehicleImpl implements Vehicle {
+
+    @Override
+    public void moveTo(long altitude, long longitude) {
+        // do nothing
+    }
+}
@@ -0,0 +1,36 @@
+package com.ossez.java_8_features.groupingby;
+
+public class BlogPost {
+    private String title;
+    private String author;
+    private BlogPostType type;
+    private int likes;
+
+    public BlogPost(String title, String author, BlogPostType type, int likes) {
+        this.title = title;
+        this.author = author;
+        this.type = type;
+        this.likes = likes;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public String getAuthor() {
+        return author;
+    }
+
+    public BlogPostType getType() {
+        return type;
+    }
+
+    public int getLikes() {
+        return likes;
+    }
+
+    @Override
+    public String toString() {
+        return "BlogPost{" + "title='" + title + '\'' + ", type=" + type + ", likes=" + likes + '}';
+    }
+}
@@ -0,0 +1,5 @@
+package com.ossez.java_8_features.groupingby;
+
+public enum BlogPostType {
+    NEWS, REVIEW, GUIDE
+}
@@ -0,0 +1,41 @@
+package com.ossez.java_8_features.groupingby;
+
+import java.util.Objects;
+
+public class Tuple {
+    private final BlogPostType type;
+    private final String author;
+
+    public Tuple(BlogPostType type, String author) {
+        this.type = type;
+        this.author = author;
+    }
+
+    public BlogPostType getType() {
+        return type;
+    }
+
+    public String getAuthor() {
+        return author;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o)
+            return true;
+        if (o == null || getClass() != o.getClass())
+            return false;
+        Tuple tuple = (Tuple) o;
+        return type == tuple.type && author.equals(tuple.author);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(type, author);
+    }
+
+    @Override
+    public String toString() {
+        return "Tuple{" + "type=" + type + ", author='" + author + '\'' + '}';
+    }
+}
@@ -0,0 +1,19 @@
+package com.ossez.nullsafecollectionstreams;
+
+import java.util.Collection;
+import java.util.stream.Stream;
+import static org.apache.commons.collections4.CollectionUtils.emptyIfNull;
+
+public class NullSafeCollectionStreamsUsingCommonsEmptyIfNull {
+
+    /**
+    * This method shows how to make a null safe stream from a collection through the use of 
+    * emptyIfNull() method from Apache Commons CollectionUtils library
+    * 
+     * @param collection The collection that is to be converted into a stream
+     * @return The stream that has been created from the collection or an empty stream if the collection is null
+    */
+    public Stream<String> collectionAsStream(Collection<String> collection) {
+        return emptyIfNull(collection).stream();
+    }
+}
@@ -0,0 +1,21 @@
+package com.ossez.nullsafecollectionstreams;
+
+import java.util.Collection;
+import java.util.Optional;
+import java.util.stream.Stream;
+
+public class NullSafeCollectionStreamsUsingJava8OptionalContainer {
+
+    /**
+    * This method shows how to make a null safe stream from a collection  through the use of 
+    * Java SE 8’s Optional Container
+    * 
+     * @param collection The collection that is to be converted into a stream
+     * @return The stream that has been created from the collection or an empty stream if the collection is null
+    */
+    public Stream<String> collectionAsStream(Collection<String> collection) {
+        return Optional.ofNullable(collection)
+            .map(Collection::stream)
+            .orElseGet(Stream::empty);
+    }
+}
@@ -0,0 +1,20 @@
+package com.ossez.nullsafecollectionstreams;
+
+import java.util.Collection;
+import java.util.stream.Stream;
+
+public class NullSafeCollectionStreamsUsingNullDereferenceCheck {
+    
+    /**
+    * This method shows how to make a null safe stream from a collection through the use of a check 
+    * to prevent null dereferences
+    * 
+    * @param collection The collection that is to be converted into a stream
+    * @return The stream that has been created from the collection or an empty stream if the collection is null
+    */
+    public Stream<String> collectionAsStream(Collection<String> collection) {
+        return collection == null ? Stream.empty() : collection.stream();
+    }    
+
+
+}
@@ -0,0 +1,44 @@
+package com.ossez.spliteratorAPI;
+
+import java.util.List;
+
+public class Article {
+    private List<Author> listOfAuthors;
+    private int id;
+    private String name;
+
+    public Article(String name) {
+        this.name = name;
+    }
+
+    public Article(List<Author> listOfAuthors, int id) {
+        super();
+        this.listOfAuthors = listOfAuthors;
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public void setId(int id) {
+        this.id = id;
+    }
+
+    public List<Author> getListOfAuthors() {
+        return listOfAuthors;
+    }
+
+    public void setListOfAuthors(List<Author> listOfAuthors) {
+        this.listOfAuthors = listOfAuthors;
+    }
+
+}
@@ -0,0 +1,33 @@
+package com.ossez.spliteratorAPI;
+
+public class Author {
+    private String name;
+    private int relatedArticleId;
+
+    public Author(String name, int relatedArticleId) {
+        this.name = name;
+        this.relatedArticleId = relatedArticleId;
+    }
+
+    public int getRelatedArticleId() {
+        return relatedArticleId;
+    }
+
+    public void setRelatedArticleId(int relatedArticleId) {
+        this.relatedArticleId = relatedArticleId;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    @Override
+    public String toString() {
+        return "[name: " + name + ", relatedId: " + relatedArticleId + "]";
+    }
+}
+
@@ -0,0 +1,19 @@
+package com.ossez.spliteratorAPI;
+
+import java.util.List;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+public class Executor {
+
+	public static int countAutors(Stream<Author> stream) {
+		RelatedAuthorCounter wordCounter = stream.reduce(new RelatedAuthorCounter(0, true),
+				RelatedAuthorCounter::accumulate, RelatedAuthorCounter::combine);
+		return wordCounter.getCounter();
+	}
+
+	public static List<Article> generateElements() {
+		return Stream.generate(() -> new Article("Java")).limit(35000).collect(Collectors.toList());
+	}
+
+}
@@ -0,0 +1,27 @@
+package com.ossez.spliteratorAPI;
+
+public class RelatedAuthorCounter {
+    private final int counter;
+    private final boolean isRelated;
+
+    public RelatedAuthorCounter(int counter, boolean isRelated) {
+        this.counter = counter;
+        this.isRelated = isRelated;
+    }
+
+    public RelatedAuthorCounter accumulate(Author author) {
+        if (author.getRelatedArticleId() == 0) {
+            return isRelated ? this : new RelatedAuthorCounter(counter, true);
+        } else {
+            return isRelated ? new RelatedAuthorCounter(counter + 1, false) : this;
+        }
+    }
+
+    public RelatedAuthorCounter combine(RelatedAuthorCounter RelatedAuthorCounter) {
+        return new RelatedAuthorCounter(counter + RelatedAuthorCounter.counter, RelatedAuthorCounter.isRelated);
+    }
+
+    public int getCounter() {
+        return counter;
+    }
+}
@@ -0,0 +1,49 @@
+package com.ossez.spliteratorAPI;
+
+import java.util.List;
+import java.util.Spliterator;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.function.Consumer;
+
+public class RelatedAuthorSpliterator implements Spliterator<Author> {
+	private final List<Author> list;
+	AtomicInteger current = new AtomicInteger();
+
+	public RelatedAuthorSpliterator(List<Author> list) {
+		this.list = list;
+	}
+
+	@Override
+	public boolean tryAdvance(Consumer<? super Author> action) {
+
+		action.accept(list.get(current.getAndIncrement()));
+		return current.get() < list.size();
+	}
+
+	@Override
+	public Spliterator<Author> trySplit() {
+		int currentSize = list.size() - current.get();
+		if (currentSize < 10) {
+			return null;
+		}
+		for (int splitPos = currentSize / 2 + current.intValue(); splitPos < list.size(); splitPos++) {
+			if (list.get(splitPos).getRelatedArticleId() == 0) {
+				Spliterator<Author> spliterator = new RelatedAuthorSpliterator(list.subList(current.get(), splitPos));
+				current.set(splitPos);
+				return spliterator;
+			}
+		}
+		return null;
+	}
+
+	@Override
+	public long estimateSize() {
+		return list.size() - current.get();
+	}
+
+	@Override
+	public int characteristics() {
+		return CONCURRENT;
+	}
+
+}
@@ -0,0 +1,27 @@
+package com.ossez.spliteratorAPI;
+
+import java.util.Spliterator;
+import java.util.concurrent.Callable;
+
+public class Task implements Callable<String> {
+    private Spliterator<Article> spliterator;
+    private final static String SUFFIX = "- published by Baeldung";
+
+    public Task(Spliterator<Article> spliterator) {
+        this.spliterator = spliterator;
+    }
+
+    @Override
+    public String call() {
+        int current = 0;
+        while (spliterator.tryAdvance(article -> {
+            article.setName(article.getName()
+                .concat(SUFFIX));
+        })) {
+            current++;
+        }
+        ;
+        return Thread.currentThread()
+            .getName() + ":" + current;
+    }
+}
--- a/Show More
+++ b/Show More