Merge branch 'master' of https://github.com/eugenp/tutorials into task/JAVA-13629

core-java-modules/core-java-11-2/README.md

@@ -12,5 +12,4 @@ This module contains articles about Java 11 core features
 - [Java HTTPS Client Certificate Authentication](https://www.baeldung.com/java-https-client-certificate-authentication)
 - [Call Methods at Runtime Using Java Reflection](https://www.baeldung.com/java-method-reflection)
 - [Java HttpClient Basic Authentication](https://www.baeldung.com/java-httpclient-basic-auth)
-- [Java HttpClient With SSL](https://www.baeldung.com/java-httpclient-ssl)
-- [Adding Parameters to Java HttpClient Requests](https://www.baeldung.com/java-httpclient-request-parameters)
+- [Java HttpClient With SSL](https://www.baeldung.com/java-httpclient-ssl)

core-java-modules/core-java-11-3/README.md

@@ -0,0 +1,6 @@
+## Core Java 11
+
+This module contains articles about Java 11 core features
+
+### Relevant articles
+- [Adding Parameters to Java HttpClient Requests](https://www.baeldung.com/java-httpclient-request-parameters)

core-java-modules/core-java-11-3/pom.xml

@@ -0,0 +1,37 @@
+<?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-11-3</artifactId>
+    <version>0.1.0-SNAPSHOT</version>
+    <name>core-java-11-3</name>
+    <packaging>jar</packaging>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-modules</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+        <relativePath>../../pom.xml</relativePath>
+    </parent>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>${maven-compiler-plugin.version}</version>
+                <configuration>
+                    <source>${maven.compiler.source.version}</source>
+                    <target>${maven.compiler.target.version}</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+    <properties>
+        <maven.compiler.source.version>11</maven.compiler.source.version>
+        <maven.compiler.target.version>11</maven.compiler.target.version>
+    </properties>
+
+</project>

core-java-modules/core-java-17/README.md

@@ -5,4 +5,4 @@
 - [Introduction to HexFormat in Java 17](https://www.baeldung.com/java-hexformat)
 - [New Features in Java 17](https://www.baeldung.com/java-17-new-features)
 - [Random Number Generators in Java 17](https://www.baeldung.com/java-17-random-number-generators)
-- [Sealed Classes and Interfaces in Java 17](https://www.baeldung.com/java-sealed-classes-interfaces)
+- [Sealed Classes and Interfaces in Java](https://www.baeldung.com/java-sealed-classes-interfaces)

core-java-modules/core-java-collections-list-4/src/test/java/com/baeldung/list/replace/ReplaceUsingIndexInArrayListUnitTest.java

@@ -0,0 +1,21 @@
+package com.baeldung.list.replace;
+
+import org.junit.jupiter.api.Test;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class ReplaceUsingIndexInArrayListUnitTest {
+
+    private static final List<Integer> EXPECTED = new ArrayList<>(Arrays.asList(1, 2, 3, 4, 5));
+
+    @Test void givenArrayList_updateUsingSet() {
+        List<Integer> aList = new ArrayList<>(Arrays.asList(1, 2, 7, 4, 5));
+        aList.set(2, 3);
+        assertThat(aList).isEqualTo(EXPECTED);
+    }
+}

core-java-modules/core-java-collections-maps-5/src/main/java/com/baeldung/map/multikey/BaseClassUserCache.java

@@ -0,0 +1,24 @@
+package com.baeldung.map.multikey;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class BaseClassUserCache {
+    private final Map<Object, User> cache = new HashMap<>();
+
+    public User getById(String id) {
+        return cache.get(id);
+    }
+
+    public User getById(Long id) {
+        return cache.get(id);
+    }
+
+    public void storeById(String id, User user) {
+        cache.put(id, user);
+    }
+
+    public void storeById(Long id, User user) {
+        cache.put(id, user);
+    }
+}

core-java-modules/core-java-collections-maps-5/src/main/java/com/baeldung/map/multikey/MultipleMapsUserCache.java

@@ -0,0 +1,25 @@
+package com.baeldung.map.multikey;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class MultipleMapsUserCache {
+    private final Map<String, User> stringCache = new HashMap<>();
+    private final Map<Long, User> longCache = new HashMap<>();
+
+    public User getById(String id) {
+        return stringCache.get(id);
+    }
+
+    public User getById(Long id) {
+        return longCache.get(id);
+    }
+
+    public void storeById(String id, User user) {
+        stringCache.put(id, user);
+    }
+
+    public void storeById(Long id, User user) {
+        longCache.put(id, user);
+    }
+}

core-java-modules/core-java-collections-maps-5/src/main/java/com/baeldung/map/multikey/User.java

@@ -0,0 +1,13 @@
+package com.baeldung.map.multikey;
+
+public class User {
+    private final String name;
+
+    public User(String name) {
+        this.name = name;
+    }
+
+    public String getName() {
+        return name;
+    }
+}

core-java-modules/core-java-collections-maps-5/src/main/java/com/baeldung/map/multikey/WrapperClassUserCache.java

@@ -0,0 +1,42 @@
+package com.baeldung.map.multikey;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Objects;
+
+public class WrapperClassUserCache {
+    private Map<CacheKey, User> cache = new HashMap<>();
+
+    public User getById(CacheKey key) {
+        return cache.get(key);
+    }
+
+    public void storeById(CacheKey key, User user) {
+        cache.put(key, user);
+    }
+
+    public static class CacheKey {
+        private final Object value;
+
+        public CacheKey(String value) {
+            this.value = value;
+        }
+
+        public CacheKey(Long value) {
+            this.value = value;
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            if (this == o) return true;
+            if (o == null || getClass() != o.getClass()) return false;
+            CacheKey cacheKey = (CacheKey) o;
+            return value.equals(cacheKey.value);
+        }
+
+        @Override
+        public int hashCode() {
+            return Objects.hash(value);
+        }
+    }
+}

core-java-modules/core-java-collections-maps-5/src/main/java/com/baeldung/map/multikey/WrapperInterfaceUserCache.java

@@ -0,0 +1,62 @@
+package com.baeldung.map.multikey;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Objects;
+
+public class WrapperInterfaceUserCache {
+    private Map<CacheKey, User> cache = new HashMap<>();
+
+    public User getById(CacheKey key) {
+        return cache.get(key);
+    }
+
+    public void storeById(CacheKey key, User user) {
+        cache.put(key, user);
+    }
+
+    public interface CacheKey {
+    }
+
+    public static class StringCacheKey implements CacheKey{
+        private final String value;
+
+        public StringCacheKey(String value) {
+            this.value = value;
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            if (this == o) return true;
+            if (o == null || getClass() != o.getClass()) return false;
+            StringCacheKey that = (StringCacheKey) o;
+            return value.equals(that.value);
+        }
+
+        @Override
+        public int hashCode() {
+            return Objects.hash(value);
+        }
+    }
+
+    public static class LongCacheKey implements CacheKey {
+        private final Long value;
+
+        public LongCacheKey(Long value) {
+            this.value = value;
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            if (this == o) return true;
+            if (o == null || getClass() != o.getClass()) return false;
+            LongCacheKey that = (LongCacheKey) o;
+            return value.equals(that.value);
+        }
+
+        @Override
+        public int hashCode() {
+            return Objects.hash(value);
+        }
+    }
+}

core-java-modules/core-java-collections-maps-5/src/test/java/com/baeldung/map/multikey/BaseClassUserCacheUnitTest.java

@@ -0,0 +1,32 @@
+package com.baeldung.map.multikey;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class BaseClassUserCacheUnitTest {
+    private BaseClassUserCache cache = new BaseClassUserCache();
+
+    @BeforeEach
+    public void setup() {
+        cache.storeById("a", new User("User A"));
+        cache.storeById("b", new User("User B"));
+        cache.storeById(3L, new User("User 3"));
+        cache.storeById(4L, new User("User 4"));
+    }
+
+    @Test
+    public void getByString() {
+        User user = cache.getById("b");
+        assertNotNull(user);
+        assertEquals("User B", user.getName());
+    }
+
+    @Test
+    public void getByLong() {
+        User user = cache.getById(4L);
+        assertNotNull(user);
+        assertEquals("User 4", user.getName());
+    }
+}

core-java-modules/core-java-collections-maps-5/src/test/java/com/baeldung/map/multikey/MultipleMapsUserCacheUnitTest.java

@@ -0,0 +1,33 @@
+package com.baeldung.map.multikey;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+class MultipleMapsUserCacheUnitTest {
+    private MultipleMapsUserCache cache = new MultipleMapsUserCache();
+
+    @BeforeEach
+    public void setup() {
+        cache.storeById("a", new User("User A"));
+        cache.storeById("b", new User("User B"));
+        cache.storeById(3L, new User("User 3"));
+        cache.storeById(4L, new User("User 4"));
+    }
+
+    @Test
+    public void getByString() {
+        User user = cache.getById("b");
+        assertNotNull(user);
+        assertEquals("User B", user.getName());
+    }
+
+    @Test
+    public void getByLong() {
+        User user = cache.getById(4L);
+        assertNotNull(user);
+        assertEquals("User 4", user.getName());
+    }
+}

core-java-modules/core-java-collections-maps-5/src/test/java/com/baeldung/map/multikey/WrapperClassUserCacheUnitTest.java

@@ -0,0 +1,33 @@
+package com.baeldung.map.multikey;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+class WrapperClassUserCacheUnitTest {
+    private WrapperClassUserCache cache = new WrapperClassUserCache();
+
+    @BeforeEach
+    public void setup() {
+        cache.storeById(new WrapperClassUserCache.CacheKey("a"), new User("User A"));
+        cache.storeById(new WrapperClassUserCache.CacheKey("b"), new User("User B"));
+        cache.storeById(new WrapperClassUserCache.CacheKey(3L), new User("User 3"));
+        cache.storeById(new WrapperClassUserCache.CacheKey(4L), new User("User 4"));
+    }
+
+    @Test
+    public void getByString() {
+        User user = cache.getById(new WrapperClassUserCache.CacheKey("b"));
+        assertNotNull(user);
+        assertEquals("User B", user.getName());
+    }
+
+    @Test
+    public void getByLong() {
+        User user = cache.getById(new WrapperClassUserCache.CacheKey(4L));
+        assertNotNull(user);
+        assertEquals("User 4", user.getName());
+    }
+}

core-java-modules/core-java-collections-maps-5/src/test/java/com/baeldung/map/multikey/WrapperInterfaceUserCacheUnitTest.java

@@ -0,0 +1,33 @@
+package com.baeldung.map.multikey;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+class WrapperInterfaceUserCacheUnitTest {
+    private WrapperInterfaceUserCache cache = new WrapperInterfaceUserCache();
+
+    @BeforeEach
+    public void setup() {
+        cache.storeById(new WrapperInterfaceUserCache.StringCacheKey("a"), new User("User A"));
+        cache.storeById(new WrapperInterfaceUserCache.StringCacheKey("b"), new User("User B"));
+        cache.storeById(new WrapperInterfaceUserCache.LongCacheKey(3L), new User("User 3"));
+        cache.storeById(new WrapperInterfaceUserCache.LongCacheKey(4L), new User("User 4"));
+    }
+
+    @Test
+    public void getByString() {
+        User user = cache.getById(new WrapperInterfaceUserCache.StringCacheKey("b"));
+        assertNotNull(user);
+        assertEquals("User B", user.getName());
+    }
+
+    @Test
+    public void getByLong() {
+        User user = cache.getById(new WrapperInterfaceUserCache.LongCacheKey(4L));
+        assertNotNull(user);
+        assertEquals("User 4", user.getName());
+    }
+}

core-java-modules/core-java-lang-oop-constructors/src/main/java/com/baeldung/initializerblock/instanceblock/InstanceBlockExample.java

@@ -0,0 +1,22 @@
+package com.baeldung.initializerblock.instanceblock;
+
+public class InstanceBlockExample {
+
+    {
+        System.out.println("Instance initializer block 1");
+    }
+    
+    {
+        System.out.println("Instance initializer block 2");
+    }
+    
+    public InstanceBlockExample() {
+        System.out.println("Class constructor");
+    }
+
+    public static void main(String[] args) {
+        InstanceBlockExample iib = new InstanceBlockExample();
+        System.out.println("Main Method");
+    }
+}
+

core-java-modules/core-java-lang-oop-constructors/src/main/java/com/baeldung/initializerblock/staticblock/StaticBlockExample.java

@@ -0,0 +1,17 @@
+package com.baeldung.initializerblock.staticblock;
+
+public class StaticBlockExample {
+
+    static {
+        System.out.println("static block 1");
+    }
+    
+    static {
+        System.out.println("static block 2");
+    }
+
+    public static void main(String[] args) {
+        System.out.println("Main Method");
+    }
+}
+

core-java-modules/core-java-numbers-5/pom.xml

@@ -22,4 +22,22 @@
         </resources>
     </build>
 
+    <dependencies>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-engine</artifactId>
+            <version>${junit-jupiter.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-lang3</artifactId>
+            <version>${commons-lang3.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>com.google.guava</groupId>
+            <artifactId>guava</artifactId>
+            <version>${guava.version}</version>
+        </dependency>
+    </dependencies>
 </project>

core-java-modules/core-java-numbers-5/src/main/java/com/baeldung/intrange/IntRangeApacheCommons.java

@@ -0,0 +1,26 @@
+package com.baeldung.intrange;
+
+import org.apache.commons.lang3.Range;
+
+public class IntRangeApacheCommons {
+
+    public static boolean isInClosedRange(Integer number, Integer lowerBound, Integer upperBound) {
+        final Range<Integer> range = Range.between(lowerBound, upperBound);
+        return range.contains(number);
+    }
+
+    public static boolean isInOpenRange(Integer number, Integer lowerBound, Integer upperBound) {
+        final Range<Integer> range = Range.between(lowerBound + 1, upperBound - 1);
+        return range.contains(number);
+    }
+
+    public static boolean isInOpenClosedRange(Integer number, Integer lowerBound, Integer upperBound) {
+        final Range<Integer> range = Range.between(lowerBound + 1, upperBound);
+        return range.contains(number);
+    }
+
+    public static boolean isInClosedOpenRange(Integer number, Integer lowerBound, Integer upperBound) {
+        final Range<Integer> range = Range.between(lowerBound, upperBound - 1);
+        return range.contains(number);
+    }
+}

core-java-modules/core-java-numbers-5/src/main/java/com/baeldung/intrange/IntRangeGoogleGuava.java

@@ -0,0 +1,26 @@
+package com.baeldung.intrange;
+
+import com.google.common.collect.Range;
+
+public class IntRangeGoogleGuava {
+
+    public static boolean isInClosedRange(Integer number, Integer lowerBound, Integer upperBound) {
+        final Range<Integer> range = Range.closed(lowerBound, upperBound);
+        return range.contains(number);
+    }
+
+    public static boolean isInOpenRange(Integer number, Integer lowerBound, Integer upperBound) {
+        final Range<Integer> range = Range.open(lowerBound, upperBound);
+        return range.contains(number);
+    }
+
+    public static boolean isInOpenClosedRange(Integer number, Integer lowerBound, Integer upperBound) {
+        final Range<Integer> range = Range.openClosed(lowerBound, upperBound);
+        return range.contains(number);
+    }
+
+    public static boolean isInClosedOpenRange(Integer number, Integer lowerBound, Integer upperBound) {
+        final Range<Integer> range = Range.closedOpen(lowerBound, upperBound);
+        return range.contains(number);
+    }
+}

core-java-modules/core-java-numbers-5/src/main/java/com/baeldung/intrange/IntRangeOperators.java

@@ -0,0 +1,20 @@
+package com.baeldung.intrange;
+
+public class IntRangeOperators {
+
+    public static boolean isInClosedRange(Integer number, Integer lowerBound, Integer upperBound) {
+        return (lowerBound <= number && number <= upperBound);
+    }
+
+    public static boolean isInOpenRange(Integer number, Integer lowerBound, Integer upperBound) {
+        return (lowerBound < number && number < upperBound);
+    }
+
+    public static boolean isInOpenClosedRange(Integer number, Integer lowerBound, Integer upperBound) {
+        return (lowerBound < number && number <= upperBound);
+    }
+
+    public static boolean isInClosedOpenRange(Integer number, Integer lowerBound, Integer upperBound) {
+        return (lowerBound <= number && number < upperBound);
+    }
+}

core-java-modules/core-java-numbers-5/src/main/java/com/baeldung/intrange/IntRangeValueRange.java

@@ -0,0 +1,26 @@
+package com.baeldung.intrange;
+
+import java.time.temporal.ValueRange;
+
+public class IntRangeValueRange {
+
+    public static boolean isInClosedRange(Integer number, Integer lowerBound, Integer upperBound) {
+        final ValueRange range = ValueRange.of(lowerBound, upperBound);
+        return range.isValidIntValue(number);
+    }
+
+    public static boolean isInOpenRange(Integer number, Integer lowerBound, Integer upperBound) {
+        final ValueRange range = ValueRange.of(lowerBound + 1, upperBound - 1);
+        return range.isValidIntValue(number);
+    }
+
+    public static boolean isInOpenClosedRange(Integer number, Integer lowerBound, Integer upperBound) {
+        final ValueRange range = ValueRange.of(lowerBound + 1, upperBound);
+        return range.isValidIntValue(number);
+    }
+
+    public static boolean isInClosedOpenRange(Integer number, Integer lowerBound, Integer upperBound) {
+        final ValueRange range = ValueRange.of(lowerBound, upperBound - 1);
+        return range.isValidIntValue(number);
+    }
+}

core-java-modules/core-java-numbers-5/src/test/java/com/baeldung/intrange/IntRangeApacheCommonsUnitTest.java

@@ -0,0 +1,97 @@
+package com.baeldung.intrange;
+
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import org.junit.jupiter.api.Test;
+
+public class IntRangeApacheCommonsUnitTest {
+
+    @Test
+    void givenIntRangeApacheCommons_whenIsInClosedRange_thenSuccess() {
+        // when
+        boolean resultLowerBound = IntRangeApacheCommons.isInClosedRange(10, 10, 20);
+        boolean resultUpperBound = IntRangeApacheCommons.isInClosedRange(20, 10, 20);
+
+        // then
+        assertTrue(resultLowerBound);
+        assertTrue(resultUpperBound);
+    }
+
+    @Test
+    void givenIntRangeApacheCommons_whenIsNotInClosedRange_thenFailure() {
+        // when
+        boolean resultLowerBound = IntRangeApacheCommons.isInClosedRange(8, 10, 20);
+        boolean resultUpperBound = IntRangeApacheCommons.isInClosedRange(22, 10, 20);
+
+        // then
+        assertFalse(resultLowerBound);
+        assertFalse(resultUpperBound);
+    }
+
+    @Test
+    void givenIntRangeApacheCommons_whenIsInOpenRange_thenSuccess() {
+        // when
+        boolean resultLowerBound = IntRangeApacheCommons.isInOpenRange(11, 10, 20);
+        boolean resultUpperBound = IntRangeApacheCommons.isInOpenRange(19, 10, 20);
+
+        // then
+        assertTrue(resultLowerBound);
+        assertTrue(resultUpperBound);
+    }
+
+    @Test
+    void givenIntRangeApacheCommons_whenIsNotInOpenRange_thenFailure() {
+        // when
+        boolean resultLowerBound = IntRangeApacheCommons.isInOpenRange(10, 10, 20);
+        boolean resultUpperBound = IntRangeApacheCommons.isInOpenRange(20, 10, 20);
+
+        // then
+        assertFalse(resultLowerBound);
+        assertFalse(resultUpperBound);
+    }
+
+    @Test
+    void givenIntRangeApacheCommons_whenIsInOpenClosedRange_thenSuccess() {
+        // when
+        boolean resultLowerBound = IntRangeApacheCommons.isInOpenClosedRange(11, 10, 20);
+        boolean resultUpperBound = IntRangeApacheCommons.isInOpenClosedRange(20, 10, 20);
+
+        // then
+        assertTrue(resultLowerBound);
+        assertTrue(resultUpperBound);
+    }
+
+    @Test
+    void givenIntRangeApacheCommons_whenIsNotInOpenClosedRange_thenFailure() {
+        // when
+        boolean resultLowerBound = IntRangeApacheCommons.isInOpenClosedRange(10, 10, 20);
+        boolean resultUpperBound = IntRangeApacheCommons.isInOpenClosedRange(21, 10, 20);
+
+        // then
+        assertFalse(resultLowerBound);
+        assertFalse(resultUpperBound);
+    }
+
+    @Test
+    void givenIntRangeApacheCommons_whenIsInClosedOpenRange_thenSuccess() {
+        // when
+        boolean resultLowerBound = IntRangeApacheCommons.isInClosedOpenRange(10, 10, 20);
+        boolean resultUpperBound = IntRangeApacheCommons.isInClosedOpenRange(19, 10, 20);
+
+        // then
+        assertTrue(resultLowerBound);
+        assertTrue(resultUpperBound);
+    }
+
+    @Test
+    void givenIntRangeApacheCommons_whenIsNotInClosedOpenRange_thenFailure() {
+        // when
+        boolean resultLowerBound = IntRangeApacheCommons.isInClosedOpenRange(9, 10, 20);
+        boolean resultUpperBound = IntRangeApacheCommons.isInClosedOpenRange(20, 10, 20);
+
+        // then
+        assertFalse(resultLowerBound);
+        assertFalse(resultUpperBound);
+    }
+}