Merge branch 'master' of https://github.com/eugenp/tutorials into task/BAEL-20665

# Conflicts:
#	core-java-modules/core-java-jndi/pom.xml

algorithms-miscellaneous-1/pom.xml

@@ -64,7 +64,7 @@
             <plugin>
                 <groupId>org.codehaus.mojo</groupId>
                 <artifactId>cobertura-maven-plugin</artifactId>
-                <version>2.7</version>
+                <version>${cobertura.plugin.version}</version>
                 <configuration>
                     <instrumentation>
                         <ignores>
@@ -85,6 +85,7 @@
         <commons-codec.version>1.11</commons-codec.version>
         <guava.version>27.0.1-jre</guava.version>
         <combinatoricslib3.version>3.3.0</combinatoricslib3.version>
+        <cobertura.plugin.version>2.7</cobertura.plugin.version>
     </properties>
 
 </project>

algorithms-miscellaneous-3/pom.xml

@@ -46,13 +46,13 @@
         <dependency>
             <groupId>org.apache.commons</groupId>
             <artifactId>commons-lang3</artifactId>
-            <version>3.8.1</version>
+            <version>${commons.lang3.version}</version>
         </dependency>
 
         <dependency>
             <groupId>pl.pragmatists</groupId>
             <artifactId>JUnitParams</artifactId>
-            <version>1.1.0</version>
+            <version>${JUnitParams.version}</version>
             <scope>test</scope>
         </dependency>
         <dependency>
@@ -91,6 +91,8 @@
         <retrofit.version>2.6.0</retrofit.version>
         <jmh-core.version>1.19</jmh-core.version>
         <jmh-generator.version>1.19</jmh-generator.version>
+        <commons.lang3.version>3.8.1</commons.lang3.version>
+        <JUnitParams.version>1.1.0</JUnitParams.version>
     </properties>
 
 </project>

algorithms-miscellaneous-5/pom.xml

@@ -37,7 +37,7 @@
         <dependency>
             <groupId>com.google.guava</groupId>
             <artifactId>guava</artifactId>
-            <version>28.1-jre</version>
+            <version>${guava.version}</version>
         </dependency>
 
         <dependency>
@@ -65,6 +65,7 @@
         <org.assertj.core.version>3.9.0</org.assertj.core.version>
         <commons-codec.version>1.11</commons-codec.version>
         <commons-math3.version>3.6.1</commons-math3.version>
+        <guava.version>28.1-jre</guava.version>
     </properties>
 
 </project>

apache-cxf/sse-jaxrs/sse-jaxrs-server/pom.xml

@@ -18,19 +18,19 @@
         <dependency>
             <groupId>javax.ws.rs</groupId>
             <artifactId>javax.ws.rs-api</artifactId>
-            <version>2.1</version>
+            <version>${rs-api.version}</version>
             <scope>provided</scope>
         </dependency>
         <dependency>
             <groupId>javax.enterprise</groupId>
             <artifactId>cdi-api</artifactId>
-            <version>2.0</version>
+            <version>${cdi-api.version}</version>
             <scope>provided</scope>
         </dependency>
         <dependency>
             <groupId>javax.json.bind</groupId>
             <artifactId>javax.json.bind-api</artifactId>
-            <version>1.0</version>
+            <version>${bind-api.version}</version>
             <scope>provided</scope>
         </dependency>
 
@@ -80,6 +80,9 @@
         <liberty-maven-plugin.version>2.4.2</liberty-maven-plugin.version>
         <failOnMissingWebXml>false</failOnMissingWebXml>
         <openliberty-version>18.0.0.2</openliberty-version>
+        <rs-api.version>2.1</rs-api.version>
+        <cdi-api.version>2.0</cdi-api.version>
+        <bind-api.version>1.0</bind-api.version>
     </properties>
 
 </project>

apache-rocketmq/pom.xml

@@ -17,11 +17,12 @@
         <dependency>
             <groupId>org.apache.rocketmq</groupId>
             <artifactId>rocketmq-spring-boot-starter</artifactId>
-            <version>2.0.4</version>
+            <version>${rocketmq.version}</version>
         </dependency>
     </dependencies>
 
     <properties>
         <geode.core>1.6.0</geode.core>
+        <rocketmq.version>2.0.4</rocketmq.version>
     </properties>
 </project>

apache-tapestry/pom.xml

@@ -81,10 +81,10 @@ of testing facilities designed for use with TestNG (http://testng.org/), so it's
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
-                <version>2.3.2</version>
+                <version>${compiler.plugin.version}</version>
                 <configuration>
-                    <source>1.8</source>
+                    <source>${source.version}</source>
-                    <target>1.8</target>
+                    <target>${target.version}</target>
                     <optimize>true</optimize>
                 </configuration>
             </plugin>
@@ -92,7 +92,7 @@ of testing facilities designed for use with TestNG (http://testng.org/), so it's
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-surefire-plugin</artifactId>
-                <version>2.7.2</version>
+                <version>${compiler.surefire.version}</version>
                 <configuration>
                     <systemPropertyVariables>
                         <tapestry.execution-mode>Qa</tapestry.execution-mode>
@@ -104,7 +104,7 @@ of testing facilities designed for use with TestNG (http://testng.org/), so it's
             <plugin>
                 <groupId>org.mortbay.jetty</groupId>
                 <artifactId>maven-jetty-plugin</artifactId>
-                <version>6.1.16</version>
+                <version>${compiler.jetty.version}</version>
                 <configuration>
                     <!-- Log to the console. -->
                     <requestLog implementation="org.mortbay.jetty.NCSARequestLog">
@@ -140,6 +140,11 @@ of testing facilities designed for use with TestNG (http://testng.org/), so it's
     </repositories>
 
     <properties>
+        <compiler.jetty.version>6.1.16</compiler.jetty.version>
+        <compiler.surefire.version>2.7.2</compiler.surefire.version>
+        <compiler.plugin.version>2.3.2</compiler.plugin.version>
+        <source.version>1.8</source.version>
+        <target.version>1.8</target.version>
         <tapestry-release-version>5.4.5</tapestry-release-version>
         <servlet-api-release-version>2.5</servlet-api-release-version>
         <testng-release-version>6.8.21</testng-release-version>

aws-reactive/pom.xml

@@ -17,6 +17,8 @@
 
 	<properties>
 		<java.version>1.8</java.version>
+        <spring.version>2.2.1.RELEASE</spring.version>
+        <awssdk.version>2.10.27</awssdk.version>
 	</properties>
 
 	<dependencyManagement>
@@ -26,7 +28,7 @@
 				<!-- Import dependency management from Spring Boot -->
 				<groupId>org.springframework.boot</groupId>
 				<artifactId>spring-boot-dependencies</artifactId>
-				<version>2.2.1.RELEASE</version>
+				<version>${spring.version}</version>
 				<type>pom</type>
 				<scope>import</scope>
 			</dependency>
@@ -34,7 +36,7 @@
 			<dependency>
 				<groupId>software.amazon.awssdk</groupId>
 				<artifactId>bom</artifactId>
-				<version>2.10.27</version>
+				<version>${awssdk.version}</version>
 				<type>pom</type>
 				<scope>import</scope>
 			</dependency>

blade/pom.xml

@@ -124,7 +124,7 @@
 
             <plugin>
                 <artifactId>maven-assembly-plugin</artifactId>
-                <version>3.1.0</version>
+                <version>${assembly.plugin.version}</version>
                 <configuration>
                     <finalName>${project.build.finalName}</finalName>
                     <appendAssemblyId>false</appendAssemblyId>
@@ -161,6 +161,7 @@
         <assertj-core.version>3.11.1</assertj-core.version>
         <maven-failsafe-plugin.version>3.0.0-M3</maven-failsafe-plugin.version>
         <process-exec-maven-plugin.version>0.7</process-exec-maven-plugin.version>
+        <assembly.plugin.version>3.1.0</assembly.plugin.version>
     </properties>
 
 </project>

core-groovy-2/pom.xml

@@ -62,12 +62,12 @@
             <plugin>
                 <groupId>org.codehaus.groovy</groupId>
                 <artifactId>groovy-eclipse-compiler</artifactId>
-                <version>3.3.0-01</version>
+                <version>${groovy.compiler.version}</version>
                 <extensions>true</extensions>
             </plugin>
             <plugin>
                 <artifactId>maven-compiler-plugin</artifactId>
-                <version>3.8.0</version>
+                <version>${compiler.plugin.version}</version>
                 <configuration>
                     <compilerId>groovy-eclipse-compiler</compilerId>
                     <source>${java.version}</source>
@@ -113,7 +113,7 @@
             </plugin>
             <plugin>
                 <artifactId>maven-surefire-plugin</artifactId>
-                <version>2.20.1</version>
+                <version>${surefire.plugin.version}</version>
                 <configuration>
                     <useFile>false</useFile>
                     <includes>
@@ -126,7 +126,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-assembly-plugin</artifactId>
-                <version>3.1.0</version>
+                <version>${assembly.plugin.version}</version>
                 <configuration>
                     <!-- get all project dependencies -->
                     <descriptorRefs>
@@ -183,6 +183,10 @@
         <groovy-wslite.version>1.1.3</groovy-wslite.version>
         <logback.version>1.2.3</logback.version>
         <groovy.version>2.5.7</groovy.version>
+        <assembly.plugin.version>3.1.0</assembly.plugin.version>
+        <surefire.plugin.version>2.20.1</surefire.plugin.version>
+        <compiler.plugin.version>3.8.0</compiler.plugin.version>
+        <groovy.compiler.version>3.3.0-01</groovy.compiler.version>
     </properties>
 
 </project>

core-groovy-collections/pom.xml

@@ -99,7 +99,7 @@
             </plugin>
             <plugin>
                 <artifactId>maven-surefire-plugin</artifactId>
-                <version>2.20.1</version>
+                <version>${surefire.plugin.version}</version>
                 <configuration>
                     <useFile>false</useFile>
                     <includes>
@@ -126,6 +126,7 @@
         <hsqldb.version>2.4.0</hsqldb.version>
         <spock-core.version>1.1-groovy-2.4</spock-core.version>
         <gmavenplus-plugin.version>1.6</gmavenplus-plugin.version>
+        <surefire.plugin.version>2.20.1</surefire.plugin.version>
     </properties>
 
 </project>

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

@@ -42,12 +42,12 @@
         <dependency>
             <groupId>org.eclipse.collections</groupId>
             <artifactId>eclipse-collections</artifactId>
-            <version>10.0.0</version>
+            <version>${eclipse.collections.version}</version>
         </dependency>
         <dependency>
             <groupId>org.eclipse.collections</groupId>
             <artifactId>eclipse-collections-api</artifactId>
-            <version>10.0.0</version>
+            <version>${eclipse.collections.version}</version>
         </dependency>
     </dependencies>
 
@@ -108,6 +108,7 @@
         <assertj.version>3.11.1</assertj.version>
         <uberjar.name>benchmarks</uberjar.name>
         <jmh.version>1.22</jmh.version>
+        <eclipse.collections.version>10.0.0</eclipse.collections.version>
     </properties>
 
 </project>

core-java-modules/core-java-13/pom.xml

@@ -41,7 +41,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-surefire-plugin</artifactId>
-                <version>3.0.0-M3</version>
+                <version>${surefire.plugin.version}</version>
                 <configuration>
                     <argLine>--enable-preview</argLine>
                 </configuration>
@@ -53,6 +53,7 @@
         <maven.compiler.source.version>13</maven.compiler.source.version>
         <maven.compiler.target.version>13</maven.compiler.target.version>
         <assertj.version>3.6.1</assertj.version>
+        <surefire.plugin.version>3.0.0-M3</surefire.plugin.version>
     </properties>
 
 </project>

core-java-modules/core-java-13/src/test/java/com/baeldung/newfeatures/SwitchExpressionsWithYieldUnitTest.java

@@ -0,0 +1,27 @@
+package com.baeldung.newfeatures;
+
+import static org.junit.Assert.assertEquals;
+
+import org.junit.Test;
+
+public class SwitchExpressionsWithYieldUnitTest {
+
+    @Test
+    @SuppressWarnings("preview")
+    public void whenSwitchingOnOperationSquareMe_thenWillReturnSquare() {
+        var me = 4;
+        var operation = "squareMe";
+        var result = switch (operation) {
+        case "doubleMe" -> {
+            yield me * 2;
+        }
+        case "squareMe" -> {
+            yield me * me;
+        }
+        default -> me;
+        };
+
+        assertEquals(16, result);
+    }
+
+}

core-java-modules/core-java-13/src/test/java/com/baeldung/newfeatures/TextBlocksUnitTest.java

@@ -0,0 +1,39 @@
+package com.baeldung.newfeatures;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import org.junit.Test;
+
+public class TextBlocksUnitTest {
+
+    private static final String JSON_STRING = "{\r\n" + "\"name\" : \"Baeldung\",\r\n" + "\"website\" : \"https://www.%s.com/\"\r\n" + "}";
+
+    @SuppressWarnings("preview")
+    private static final String TEXT_BLOCK_JSON = """
+            {
+            "name" : "Baeldung",
+            "website" : "https://www.%s.com/"
+            }
+        """;
+
+    @Test
+    public void whenTextBlocks_thenStringOperationsWork() {
+
+        assertThat(TEXT_BLOCK_JSON.contains("Baeldung")).isTrue();
+        assertThat(TEXT_BLOCK_JSON.indexOf("www")).isGreaterThan(0);
+        assertThat(TEXT_BLOCK_JSON.length()).isGreaterThan(0);
+
+    }
+
+    @SuppressWarnings("removal")
+    @Test
+    public void whenTextBlocks_thenFormattedWorksAsFormat() {
+        assertThat(TEXT_BLOCK_JSON.formatted("baeldung")
+            .contains("www.baeldung.com")).isTrue();
+
+        assertThat(String.format(JSON_STRING, "baeldung")
+            .contains("www.baeldung.com")).isTrue();
+
+    }
+   
+}

core-java-modules/core-java-14/pom.xml

@@ -36,7 +36,7 @@
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-surefire-plugin</artifactId>
-				<version>3.0.0-M3</version>
+				<version>${surefire.plugin.version}</version>
 				<configuration>
 					<argLine>--enable-preview</argLine>
 				</configuration>
@@ -47,6 +47,7 @@
 	<properties>
 		<maven.compiler.source.version>14</maven.compiler.source.version>
 		<maven.compiler.target.version>14</maven.compiler.target.version>
+        <surefire.plugin.version>3.0.0-M3</surefire.plugin.version>
 	</properties>
 
 </project>

core-java-modules/core-java-arrays-2/pom.xml

@@ -51,7 +51,7 @@
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-shade-plugin</artifactId>
-				<version>3.2.0</version>
+				<version>${shade.plugin.version}</version>
 				<executions>
 					<execution>
 						<phase>package</phase>
@@ -79,6 +79,7 @@
         <commons-lang3.version>3.9</commons-lang3.version>
         <!-- testing -->
         <assertj-core.version>3.10.0</assertj-core.version>
+        <shade.plugin.version>3.2.0</shade.plugin.version>
     </properties>
 
 </project>

core-java-modules/core-java-arrays/pom.xml

@@ -183,8 +183,8 @@
                 <artifactId>maven-javadoc-plugin</artifactId>
                 <version>${maven-javadoc-plugin.version}</version>
                 <configuration>
-                    <source>1.8</source>
+                    <source>${source.version}</source>
-                    <target>1.8</target>
+                    <target>${target.version}</target>
                 </configuration>
             </plugin>
         </plugins>
@@ -373,6 +373,8 @@
         <maven-shade-plugin.version>3.1.1</maven-shade-plugin.version>
         <spring-boot-maven-plugin.version>2.0.3.RELEASE</spring-boot-maven-plugin.version>
         <exec-maven-plugin.version>1.6.0</exec-maven-plugin.version>
+        <source.version>1.8</source.version>
+        <target.version>1.8</target.version>
     </properties>
 
 </project>

core-java-modules/core-java-jar/pom.xml

@@ -207,8 +207,8 @@
                 <artifactId>maven-javadoc-plugin</artifactId>
                 <version>${maven-javadoc-plugin.version}</version>
                 <configuration>
-                    <source>1.8</source>
+                    <source>${source.version}</source>
-                    <target>1.8</target>
+                    <target>${target.version}</target>
                 </configuration>
             </plugin>
         </plugins>
@@ -397,6 +397,8 @@
         <maven-shade-plugin.version>3.1.1</maven-shade-plugin.version>
         <spring-boot-maven-plugin.version>2.0.3.RELEASE</spring-boot-maven-plugin.version>
         <exec-maven-plugin.version>1.6.0</exec-maven-plugin.version>
+        <source.version>1.8</source.version>
+        <target.version>1.8</target.version>
     </properties>
 
 </project>

core-java-modules/core-java-jndi/pom.xml

@@ -18,7 +18,7 @@
         <dependency>
             <groupId>org.junit.jupiter</groupId>
             <artifactId>junit-jupiter</artifactId>
-            <version>5.5.1</version>
+            <version>${jupiter.version}</version>
             <scope>test</scope>
         </dependency>
         <dependency>
@@ -30,29 +30,50 @@
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-core</artifactId>
-            <version>5.0.9.RELEASE</version>
+            <version>${spring.version}</version>
         </dependency>
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-context</artifactId>
-            <version>5.0.9.RELEASE</version>
+            <version>${spring.version}</version>
         </dependency>
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-jdbc</artifactId>
-            <version>5.0.9.RELEASE</version>
+            <version>${spring.version}</version>
         </dependency>
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-test</artifactId>
-            <version>5.0.9.RELEASE</version>
+            <version>${spring.version}</version>
             <scope>test</scope>
         </dependency>
         <dependency>
             <groupId>com.h2database</groupId>
             <artifactId>h2</artifactId>
-            <version>1.4.199</version>
+            <version>${h2.version}</version>
         </dependency>
     </dependencies>
 
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>${source.version}</source>
+                    <target>${target.version}</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+    
+    <properties>
+        <spring.version>5.0.9.RELEASE</spring.version>
+        <h2.version>1.4.199</h2.version>
+        <jupiter.version>5.5.1</jupiter.version>
+        <source.version>1.8</source.version>
+        <target.version>1.8</target.version>
+    </properties>
+
 </project>

core-java-modules/core-java-jpms/decoupling-pattern1/consumermodule/pom.xml

@@ -16,7 +16,7 @@
         <dependency>
             <groupId>com.baeldung.servicemodule</groupId>
             <artifactId>servicemodule</artifactId>
-            <version>1.0</version>
+            <version>${servicemodule.version}</version>
         </dependency>
     </dependencies>
 
@@ -29,4 +29,8 @@
         </plugins>
     </build>
 
+    <properties>
+        <servicemodule.version>1.0</servicemodule.version>
+    </properties>
+
 </project>

core-java-modules/core-java-jpms/decoupling-pattern1/pom.xml

@@ -19,10 +19,10 @@
                 <plugin>
                     <groupId>org.apache.maven.plugins</groupId>
                     <artifactId>maven-compiler-plugin</artifactId>
-                    <version>3.8.0</version>
+                    <version>${compiler.plugin.version}</version>
                     <configuration>
-                        <source>11</source>
+                        <source>${source.version}</source>
-                        <target>11</target>
+                        <target>${target.version}</target>
                     </configuration>
                 </plugin>
             </plugins>
@@ -31,6 +31,9 @@
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <compiler.plugin.version>3.8.0</compiler.plugin.version>
+        <source.version>11</source.version>
+        <target.version>11</target.version>
     </properties>
 
 </project>

core-java-modules/core-java-jpms/decoupling-pattern2/consumermodule/pom.xml

@@ -17,12 +17,12 @@
         <dependency>
             <groupId>com.baeldung.servicemodule</groupId>
             <artifactId>servicemodule</artifactId>
-            <version>1.0</version>
+            <version>${servicemodule.version}</version>
         </dependency>
         <dependency>
             <groupId>com.baeldung.providermodule</groupId>
             <artifactId>providermodule</artifactId>
-            <version>1.0</version>
+            <version>${providermodule.version}</version>
         </dependency>
     </dependencies>
 
@@ -34,5 +34,10 @@
             </plugin>
         </plugins>
     </build>
+	
+    <properties>
+        <servicemodule.version>1.0</servicemodule.version>
+        <providermodule.version>1.0</providermodule.version>
+    </properties>
 
 </project>

core-java-modules/core-java-jpms/decoupling-pattern2/pom.xml

@@ -20,14 +20,20 @@
                 <plugin>
                     <groupId>org.apache.maven.plugins</groupId>
                     <artifactId>maven-compiler-plugin</artifactId>
-                    <version>3.8.0</version>
+                    <version>${compiler.plugin.version}</version>
                     <configuration>
-                        <source>11</source>
+                        <source>${source.version}</source>
-                        <target>11</target>
+                        <target>${target.version}</target>
                     </configuration>
                 </plugin>
             </plugins>
         </pluginManagement>
     </build>
+	
+    <properties>
+        <compiler.plugin.version>3.8.0</compiler.plugin.version>
+        <source.version>11</source.version>
+        <target.version>11</target.version>
+    </properties>
 
 </project>

core-java-modules/core-java-jpms/decoupling-pattern2/providermodule/pom.xml

@@ -17,7 +17,7 @@
         <dependency>
             <groupId>com.baeldung.servicemodule</groupId>
             <artifactId>servicemodule</artifactId>
-            <version>1.0</version>
+            <version>${servicemodule.version}</version>
         </dependency>
     </dependencies>
 
@@ -30,4 +30,9 @@
         </plugins>
     </build>
 
+    <properties>
+        <servicemodule.version>1.0</servicemodule.version>
+	</properties>
+
+
 </project>

core-java-modules/core-java-lang-2/pom.xml

@@ -18,7 +18,7 @@
         <dependency>
             <groupId>commons-beanutils</groupId>
             <artifactId>commons-beanutils</artifactId>
-            <version>1.9.4</version>
+            <version>${commons.beanutils.version}</version>
         </dependency>
         <dependency>
             <groupId>org.openjdk.jmh</groupId>
@@ -57,6 +57,7 @@
         <jmh-core.version>1.19</jmh-core.version>
         <jmh-generator.version>1.19</jmh-generator.version>
         <assertj.version>3.12.2</assertj.version>
+        <commons.beanutils.version>1.9.4</commons.beanutils.version>
     </properties>
 
 </project>

core-java-modules/core-java-optional/src/main/java/com/baeldung/optional/Person.java

@@ -1,6 +1,8 @@
 package com.baeldung.optional;
 
+import java.util.List;
 import java.util.Optional;
+import java.util.stream.Collectors;
 
 public class Person {
     private String name;
@@ -21,7 +23,7 @@ public class Person {
     }
 
     public Optional<Integer> getAge() {
-        return Optional.ofNullable(age);
+        return Optional.of(age);
     }
 
     public void setAge(int age) {
@@ -36,4 +38,37 @@ public class Person {
         return Optional.ofNullable(password);
     }
 
+    public static List<Person> search(List<Person> people, String name, Optional<Integer> age) {
+        // Null checks for people and name
+        return people.stream()
+                .filter(p -> p.getName().equals(name))
+                .filter(p -> p.getAge().get() >= age.orElse(0))
+                .collect(Collectors.toList());
+    }
+
+    public static List<Person> search(List<Person> people, String name, Integer age) {
+        // Null checks for people and name
+        final Integer ageFilter = age != null ? age : 0;
+
+        return people.stream()
+                .filter(p -> p.getName().equals(name))
+                .filter(p -> p.getAge().get() >= ageFilter)
+                .collect(Collectors.toList());
+    }
+
+    public static List<Person> search(List<Person> people, String name) {
+        return doSearch(people, name, 0);
+    }
+
+    public static List<Person> search(List<Person> people, String name, int age) {
+        return doSearch(people, name, age);
+    }
+
+    private static List<Person> doSearch(List<Person> people, String name, int age) {
+        // Null checks for people and name
+        return people.stream()
+                .filter(p -> p.getName().equals(name))
+                .filter(p -> p.getAge().get().intValue() >= age)
+                .collect(Collectors.toList());
+    }
 }

core-java-modules/core-java-reflection/pom.xml

@@ -37,8 +37,8 @@
                 <artifactId>maven-compiler-plugin</artifactId>
                 <version>${maven-compiler-plugin.version}</version>
                 <configuration>
-                    <source>1.8</source>
+                    <source>${source.version}</source>
-                    <target>1.8</target>
+                    <target>${target.version}</target>
                     <compilerArgument>-parameters</compilerArgument>
                 </configuration>
             </plugin>
@@ -48,5 +48,7 @@
     <properties>
         <maven-compiler-plugin.version>3.8.0</maven-compiler-plugin.version>
         <assertj-core.version>3.10.0</assertj-core.version>
+        <source.version>1.8</source.version>
+        <target.version>1.8</target.version>
     </properties>
 </project>

core-java-modules/core-java-reflection/src/main/java/com/baeldung/reflection/exception/invocationtarget/InvocationTargetExample.java

@@ -0,0 +1,7 @@
+package com.baeldung.reflection.exception.invocationtarget;
+
+public class InvocationTargetExample {
+    public int divideByZeroExample() {
+        return 1 / 0;
+    }
+}

core-java-modules/core-java-reflection/src/test/java/com/baeldung/reflection/exception/invocationtarget/InvocationTargetUnitTest.java

@@ -0,0 +1,23 @@
+package com.baeldung.reflection.exception.invocationtarget;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+
+import org.junit.jupiter.api.Test;
+
+public class InvocationTargetUnitTest {
+
+    @Test
+    public void whenCallingMethodThrowsException_thenAssertCauseOfInvocationTargetException() throws Exception {
+
+        InvocationTargetExample targetExample = new InvocationTargetExample();
+        Method method = InvocationTargetExample.class.getMethod("divideByZeroExample");
+        
+        Exception exception = assertThrows(InvocationTargetException.class, () -> method.invoke(targetExample));
+        
+        assertEquals(ArithmeticException.class, exception.getCause().getClass());
+    }
+}

core-java-modules/core-java-string-algorithms-3/pom.xml

@@ -25,7 +25,7 @@
 		<dependency>
 			<groupId>com.google.guava</groupId>
 			<artifactId>guava</artifactId>
-			<version>28.1-jre</version>
+			<version>${guava.version}</version>
 		</dependency>
 
 		<dependency>
@@ -62,7 +62,7 @@
 	<properties>
 		<commons-lang3.version>3.8.1</commons-lang3.version>
 		<assertj.version>3.6.1</assertj.version>
-		<guava.version>27.0.1-jre</guava.version>
+		<guava.version>28.1-jre</guava.version>
 		<junit-jupiter-api.version>5.3.1</junit-jupiter-api.version>
 	</properties>