diff --git a/core-java/pom.xml b/core-java/pom.xml
index 84a56c8bc7..295eabc265 100644
--- a/core-java/pom.xml
+++ b/core-java/pom.xml
@@ -1,420 +1,456 @@
 <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>
-    <groupId>com.baeldung</groupId>
-    <artifactId>core-java</artifactId>
-    <version>0.1.0-SNAPSHOT</version>
-    <packaging>jar</packaging>
+	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>
+	<groupId>com.baeldung</groupId>
+	<artifactId>core-java</artifactId>
+	<version>0.1.0-SNAPSHOT</version>
+	<packaging>jar</packaging>
 
-    <name>core-java</name>
+	<name>core-java</name>
 
-    <dependencies>
+	<dependencies>
 
-        <!-- utils -->
-        <dependency>
-            <groupId>net.sourceforge.collections</groupId>
-            <artifactId>collections-generic</artifactId>
-            <version>${collections-generic.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>com.google.guava</groupId>
-            <artifactId>guava</artifactId>
-            <version>${guava.version}</version>
-        </dependency>
+		<dependency>
+			<groupId>org.openjdk.jmh</groupId>
+			<artifactId>jmh-core</artifactId>
+			<version>1.19</version>
+		</dependency>
+		<dependency>
+			<groupId>org.openjdk.jmh</groupId>
+			<artifactId>jmh-generator-annprocess</artifactId>
+			<version>1.19</version>
+		</dependency>
 
-        <dependency>
-            <groupId>org.apache.commons</groupId>
-            <artifactId>commons-collections4</artifactId>
-            <version>${commons-collections4.version}</version>
-        </dependency>
+		<!-- utils -->
+		<dependency>
+			<groupId>net.sourceforge.collections</groupId>
+			<artifactId>collections-generic</artifactId>
+			<version>${collections-generic.version}</version>
+		</dependency>
+		<dependency>
+			<groupId>com.google.guava</groupId>
+			<artifactId>guava</artifactId>
+			<version>${guava.version}</version>
+		</dependency>
 
-        <dependency>
-            <groupId>commons-io</groupId>
-            <artifactId>commons-io</artifactId>
-            <version>${commons-io.version}</version>
-        </dependency>
+		<dependency>
+			<groupId>org.apache.commons</groupId>
+			<artifactId>commons-collections4</artifactId>
+			<version>${commons-collections4.version}</version>
+		</dependency>
 
-        <dependency>
-            <groupId>org.apache.commons</groupId>
-            <artifactId>commons-lang3</artifactId>
-            <version>${commons-lang3.version}</version>
-        </dependency>
+		<dependency>
+			<groupId>commons-io</groupId>
+			<artifactId>commons-io</artifactId>
+			<version>${commons-io.version}</version>
+		</dependency>
 
-        <dependency>
-            <groupId>org.apache.commons</groupId>
-            <artifactId>commons-math3</artifactId>
-            <version>${commons-math3.version}</version>
-        </dependency>
+		<dependency>
+			<groupId>org.apache.commons</groupId>
+			<artifactId>commons-lang3</artifactId>
+			<version>${commons-lang3.version}</version>
+		</dependency>
 
-        <dependency>
-            <groupId>org.decimal4j</groupId>
-            <artifactId>decimal4j</artifactId>
-            <version>${decimal4j.version}</version>
-        </dependency>
+		<dependency>
+			<groupId>org.apache.commons</groupId>
+			<artifactId>commons-math3</artifactId>
+			<version>${commons-math3.version}</version>
+		</dependency>
 
-        <dependency>
-            <groupId>org.bouncycastle</groupId>
-            <artifactId>bcprov-jdk15on</artifactId>
-            <version>${bouncycastle.version}</version>
-        </dependency>
+		<dependency>
+			<groupId>org.decimal4j</groupId>
+			<artifactId>decimal4j</artifactId>
+			<version>${decimal4j.version}</version>
+		</dependency>
 
-        <dependency>
-            <groupId>org.unix4j</groupId>
-            <artifactId>unix4j-command</artifactId>
-            <version>${unix4j.version}</version>
-        </dependency>
+		<dependency>
+			<groupId>org.bouncycastle</groupId>
+			<artifactId>bcprov-jdk15on</artifactId>
+			<version>${bouncycastle.version}</version>
+		</dependency>
 
-        <dependency>
-            <groupId>com.googlecode.grep4j</groupId>
-            <artifactId>grep4j</artifactId>
-            <version>${grep4j.version}</version>
-        </dependency>
-        <!-- web -->
+		<dependency>
+			<groupId>org.unix4j</groupId>
+			<artifactId>unix4j-command</artifactId>
+			<version>${unix4j.version}</version>
+		</dependency>
 
-        <!-- marshalling -->
+		<dependency>
+			<groupId>com.googlecode.grep4j</groupId>
+			<artifactId>grep4j</artifactId>
+			<version>${grep4j.version}</version>
+		</dependency>
+		<!-- web -->
 
-        <dependency>
-            <groupId>com.fasterxml.jackson.core</groupId>
-            <artifactId>jackson-databind</artifactId>
-            <version>${jackson.version}</version>
-        </dependency>
+		<!-- marshalling -->
 
-        <!-- logging -->
+		<dependency>
+			<groupId>com.fasterxml.jackson.core</groupId>
+			<artifactId>jackson-databind</artifactId>
+			<version>${jackson.version}</version>
+		</dependency>
 
-        <dependency>
-            <groupId>org.slf4j</groupId>
-            <artifactId>slf4j-api</artifactId>
-            <version>${org.slf4j.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>ch.qos.logback</groupId>
-            <artifactId>logback-classic</artifactId>
-            <version>${logback.version}</version>
-            <!-- <scope>runtime</scope> -->
-        </dependency>
-        <dependency>
-            <groupId>org.slf4j</groupId>
-            <artifactId>jcl-over-slf4j</artifactId>
-            <version>${org.slf4j.version}</version>
-            <!-- <scope>runtime</scope> --> <!-- some spring dependencies need to compile against jcl -->
-        </dependency>
-        <dependency> <!-- needed to bridge to slf4j for projects that use the log4j APIs directly -->
-            <groupId>org.slf4j</groupId>
-            <artifactId>log4j-over-slf4j</artifactId>
-            <version>${org.slf4j.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>org.projectlombok</groupId>
-            <artifactId>lombok</artifactId>
-            <version>${lombok.version}</version>
-            <scope>provided</scope>
-        </dependency>
+		<!-- logging -->
 
-        <!-- test scoped -->
+		<dependency>
+			<groupId>org.slf4j</groupId>
+			<artifactId>slf4j-api</artifactId>
+			<version>${org.slf4j.version}</version>
+		</dependency>
+		<dependency>
+			<groupId>ch.qos.logback</groupId>
+			<artifactId>logback-classic</artifactId>
+			<version>${logback.version}</version>
+			<!-- <scope>runtime</scope> -->
+		</dependency>
+		<dependency>
+			<groupId>org.slf4j</groupId>
+			<artifactId>jcl-over-slf4j</artifactId>
+			<version>${org.slf4j.version}</version>
+			<!-- <scope>runtime</scope> --> <!-- some spring dependencies need to compile against jcl -->
+		</dependency>
+		<dependency> <!-- needed to bridge to slf4j for projects that use the log4j APIs directly -->
+			<groupId>org.slf4j</groupId>
+			<artifactId>log4j-over-slf4j</artifactId>
+			<version>${org.slf4j.version}</version>
+		</dependency>
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+			<version>${lombok.version}</version>
+			<scope>provided</scope>
+		</dependency>
 
-        <dependency>
-            <groupId>org.hamcrest</groupId>
-            <artifactId>hamcrest-all</artifactId>
-            <version>1.3</version>
-            <scope>test</scope>
-        </dependency>
+		<!-- test scoped -->
 
-        <dependency>
-            <groupId>junit</groupId>
-            <artifactId>junit</artifactId>
-            <version>${junit.version}</version>
-            <scope>test</scope>
-        </dependency>
+		<dependency>
+			<groupId>org.hamcrest</groupId>
+			<artifactId>hamcrest-all</artifactId>
+			<version>1.3</version>
+			<scope>test</scope>
+		</dependency>
 
-        <dependency>
-            <groupId>org.hamcrest</groupId>
-            <artifactId>hamcrest-core</artifactId>
-            <version>${org.hamcrest.version}</version>
-            <scope>test</scope>
-        </dependency>
-        <dependency>
-            <groupId>org.hamcrest</groupId>
-            <artifactId>hamcrest-library</artifactId>
-            <version>${org.hamcrest.version}</version>
-            <scope>test</scope>
-        </dependency>
+		<dependency>
+			<groupId>junit</groupId>
+			<artifactId>junit</artifactId>
+			<version>${junit.version}</version>
+			<scope>test</scope>
+		</dependency>
 
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
+		<dependency>
+			<groupId>org.hamcrest</groupId>
+			<artifactId>hamcrest-core</artifactId>
+			<version>${org.hamcrest.version}</version>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.hamcrest</groupId>
+			<artifactId>hamcrest-library</artifactId>
+			<version>${org.hamcrest.version}</version>
+			<scope>test</scope>
+		</dependency>
 
-        <dependency>
-            <groupId>org.mockito</groupId>
-            <artifactId>mockito-core</artifactId>
-            <version>${mockito.version}</version>
-            <scope>test</scope>
-        </dependency>
-        <dependency>
-            <groupId>com.jayway.awaitility</groupId>
-            <artifactId>awaitility</artifactId>
-            <version>${avaitility.version}</version>
-            <scope>test</scope>
-        </dependency>
+		<dependency>
+			<groupId>org.assertj</groupId>
+			<artifactId>assertj-core</artifactId>
+			<version>${assertj.version}</version>
+			<scope>test</scope>
+		</dependency>
 
-        <dependency>
-            <groupId>commons-codec</groupId>
-            <artifactId>commons-codec</artifactId>
-            <version>${commons-codec.version}</version>
-        </dependency>
+		<dependency>
+			<groupId>org.mockito</groupId>
+			<artifactId>mockito-core</artifactId>
+			<version>${mockito.version}</version>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>com.jayway.awaitility</groupId>
+			<artifactId>awaitility</artifactId>
+			<version>${avaitility.version}</version>
+			<scope>test</scope>
+		</dependency>
 
-        <dependency>
-            <groupId>org.javamoney</groupId>
-            <artifactId>moneta</artifactId>
-            <version>1.1</version>
-        </dependency>
+		<dependency>
+			<groupId>commons-codec</groupId>
+			<artifactId>commons-codec</artifactId>
+			<version>${commons-codec.version}</version>
+		</dependency>
 
-        <dependency>
-            <groupId>org.owasp.esapi</groupId>
-            <artifactId>esapi</artifactId>
-            <version>2.1.0.1</version>
-        </dependency>
+		<dependency>
+			<groupId>org.javamoney</groupId>
+			<artifactId>moneta</artifactId>
+			<version>1.1</version>
+		</dependency>
 
-        <dependency>
-            <groupId>com.sun.messaging.mq</groupId>
-            <artifactId>fscontext</artifactId>
-            <version>${fscontext.version}</version>
-        </dependency>
-    </dependencies>
+		<dependency>
+			<groupId>org.owasp.esapi</groupId>
+			<artifactId>esapi</artifactId>
+			<version>2.1.0.1</version>
+		</dependency>
 
-    <build>
-        <finalName>core-java</finalName>
-        <resources>
-            <resource>
-                <directory>src/main/resources</directory>
-                <filtering>true</filtering>
-            </resource>
-        </resources>
+		<dependency>
+			<groupId>com.sun.messaging.mq</groupId>
+			<artifactId>fscontext</artifactId>
+			<version>${fscontext.version}</version>
+		</dependency>
+	</dependencies>
 
-        <plugins>
+	<build>
+		<finalName>core-java</finalName>
+		<resources>
+			<resource>
+				<directory>src/main/resources</directory>
+				<filtering>true</filtering>
+			</resource>
+		</resources>
 
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-compiler-plugin</artifactId>
-                <version>${maven-compiler-plugin.version}</version>
-                <configuration>
-                    <source>1.8</source>
-                    <target>1.8</target>
-                </configuration>
-            </plugin>
+		<plugins>
 
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-surefire-plugin</artifactId>
-                <configuration>
-                    <excludes>
-                        <exclude>**/*IntegrationTest.java</exclude>
-                        <exclude>**/*LongRunningUnitTest.java</exclude>
-                        <exclude>**/*ManualTest.java</exclude>
-                    </excludes>
-                    <testFailureIgnore>true</testFailureIgnore>
-                </configuration>
-            </plugin>
+			<plugin>
+				<groupId>org.codehaus.mojo</groupId>
+				<artifactId>exec-maven-plugin</artifactId>
 
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-dependency-plugin</artifactId>
-                <executions>
-                    <execution>
-                        <id>copy-dependencies</id>
-                        <phase>prepare-package</phase>
-                        <goals>
-                            <goal>copy-dependencies</goal>
-                        </goals>
-                        <configuration>
-                            <outputDirectory>${project.build.directory}/libs</outputDirectory>
-                        </configuration>
-                    </execution>
-                </executions>
-            </plugin>
+				<executions>
+					<execution>
+						<id>run-benchmarks</id>
+						<phase>integration-test</phase>
+						<goals>
+							<goal>exec</goal>
+						</goals>
+						<configuration>
+							<classpathScope>test</classpathScope>
+							<executable>java</executable>
+							<arguments>
+								<argument>-classpath</argument>
+								<classpath />
+								<argument>org.openjdk.jmh.Main</argument>
+								<argument>.*</argument>
+							</arguments>
+						</configuration>
+					</execution>
+				</executions>
+			</plugin>
 
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-jar-plugin</artifactId>
-                <configuration>
-                    <archive>
-                        <manifest>
-                            <addClasspath>true</addClasspath>
-                            <classpathPrefix>libs/</classpathPrefix>
-                            <mainClass>org.baeldung.executable.ExecutableMavenJar</mainClass>
-                        </manifest>
-                    </archive>
-                </configuration>
-            </plugin>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-compiler-plugin</artifactId>
+				<version>${maven-compiler-plugin.version}</version>
+				<configuration>
+					<source>1.8</source>
+					<target>1.8</target>
+				</configuration>
+			</plugin>
 
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-assembly-plugin</artifactId>
-                <executions>
-                    <execution>
-                        <phase>package</phase>
-                        <goals>
-                            <goal>single</goal>
-                        </goals>
-                        <configuration>
-                            <archiveBaseDirectory>${project.basedir}</archiveBaseDirectory>
-                            <archive>
-                                <manifest>
-                                    <mainClass>org.baeldung.executable.ExecutableMavenJar</mainClass>
-                                </manifest>
-                            </archive>
-                            <descriptorRefs>
-                                <descriptorRef>jar-with-dependencies</descriptorRef>
-                            </descriptorRefs>
-                        </configuration>
-                    </execution>
-                </executions>
-            </plugin>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-surefire-plugin</artifactId>
+				<configuration>
+					<excludes>
+						<exclude>**/*IntegrationTest.java</exclude>
+						<exclude>**/*LongRunningUnitTest.java</exclude>
+						<exclude>**/*ManualTest.java</exclude>
+					</excludes>
+					<testFailureIgnore>true</testFailureIgnore>
+				</configuration>
+			</plugin>
 
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-shade-plugin</artifactId>
-                <executions>
-                    <execution>
-                        <goals>
-                            <goal>shade</goal>
-                        </goals>
-                        <configuration>
-                            <shadedArtifactAttached>true</shadedArtifactAttached>
-                            <transformers>
-                                <transformer
-                                        implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
-                                    <mainClass>org.baeldung.executable.ExecutableMavenJar</mainClass>
-                                </transformer>
-                            </transformers>
-                        </configuration>
-                    </execution>
-                </executions>
-            </plugin>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-dependency-plugin</artifactId>
+				<executions>
+					<execution>
+						<id>copy-dependencies</id>
+						<phase>prepare-package</phase>
+						<goals>
+							<goal>copy-dependencies</goal>
+						</goals>
+						<configuration>
+							<outputDirectory>${project.build.directory}/libs</outputDirectory>
+						</configuration>
+					</execution>
+				</executions>
+			</plugin>
 
-            <plugin>
-                <groupId>com.jolira</groupId>
-                <artifactId>onejar-maven-plugin</artifactId>
-                <executions>
-                    <execution>
-                        <configuration>
-                            <mainClass>org.baeldung.executable.ExecutableMavenJar</mainClass>
-                            <attachToBuild>true</attachToBuild>
-                            <filename>${project.build.finalName}-onejar.${project.packaging}</filename>
-                        </configuration>
-                        <goals>
-                            <goal>one-jar</goal>
-                        </goals>
-                    </execution>
-                </executions>
-            </plugin>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-jar-plugin</artifactId>
+				<configuration>
+					<archive>
+						<manifest>
+							<addClasspath>true</addClasspath>
+							<classpathPrefix>libs/</classpathPrefix>
+							<mainClass>org.baeldung.executable.ExecutableMavenJar</mainClass>
+						</manifest>
+					</archive>
+				</configuration>
+			</plugin>
 
-            <plugin>
-                <groupId>org.springframework.boot</groupId>
-                <artifactId>spring-boot-maven-plugin</artifactId>
-                <executions>
-                    <execution>
-                        <goals>
-                            <goal>repackage</goal>
-                        </goals>
-                        <configuration>
-                            <classifier>spring-boot</classifier>
-                            <mainClass>org.baeldung.executable.ExecutableMavenJar</mainClass>
-                        </configuration>
-                    </execution>
-                </executions>
-            </plugin>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-assembly-plugin</artifactId>
+				<executions>
+					<execution>
+						<phase>package</phase>
+						<goals>
+							<goal>single</goal>
+						</goals>
+						<configuration>
+							<archiveBaseDirectory>${project.basedir}</archiveBaseDirectory>
+							<archive>
+								<manifest>
+									<mainClass>org.baeldung.executable.ExecutableMavenJar</mainClass>
+								</manifest>
+							</archive>
+							<descriptorRefs>
+								<descriptorRef>jar-with-dependencies</descriptorRef>
+							</descriptorRefs>
+						</configuration>
+					</execution>
+				</executions>
+			</plugin>
 
-            <plugin>
-                <groupId>org.codehaus.mojo</groupId>
-                <artifactId>exec-maven-plugin</artifactId>
-                <version>1.6.0</version>
-                <configuration>
-                    <executable>java</executable>
-                    <mainClass>com.baeldung.outofmemoryerror.OutOfMemoryGCLimitExceed</mainClass>
-                    <arguments>
-                        <argument>-Xmx300m</argument>
-                        <argument>-XX:+UseParallelGC</argument>
-                        <argument>-classpath</argument>
-                        <classpath/>
-                        <argument>com.baeldung.outofmemoryerror.OutOfMemoryGCLimitExceed</argument>
-                    </arguments>
-                </configuration>
-            </plugin>
-        </plugins>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-shade-plugin</artifactId>
+				<executions>
+					<execution>
+						<goals>
+							<goal>shade</goal>
+						</goals>
+						<configuration>
+							<shadedArtifactAttached>true</shadedArtifactAttached>
+							<transformers>
+								<transformer
+									implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
+									<mainClass>org.baeldung.executable.ExecutableMavenJar</mainClass>
+								</transformer>
+							</transformers>
+						</configuration>
+					</execution>
+				</executions>
+			</plugin>
 
-    </build>
+			<plugin>
+				<groupId>com.jolira</groupId>
+				<artifactId>onejar-maven-plugin</artifactId>
+				<executions>
+					<execution>
+						<configuration>
+							<mainClass>org.baeldung.executable.ExecutableMavenJar</mainClass>
+							<attachToBuild>true</attachToBuild>
+							<filename>${project.build.finalName}-onejar.${project.packaging}</filename>
+						</configuration>
+						<goals>
+							<goal>one-jar</goal>
+						</goals>
+					</execution>
+				</executions>
+			</plugin>
 
-    <profiles>
-        <profile>
-            <id>integration</id>
-            <build>
-                <plugins>
-                    <plugin>
-                        <groupId>org.apache.maven.plugins</groupId>
-                        <artifactId>maven-surefire-plugin</artifactId>
-                        <executions>
-                            <execution>
-                                <phase>integration-test</phase>
-                                <goals>
-                                    <goal>test</goal>
-                                </goals>
-                                <configuration>
-                                    <excludes>
-                                        <exclude>**/*ManualTest.java</exclude>
-                                    </excludes>
-                                    <includes>
-                                        <include>**/*IntegrationTest.java</include>
-                                    </includes>
-                                </configuration>
-                            </execution>
-                        </executions>
-                        <configuration>
-                            <systemPropertyVariables>
-                                <test.mime>json</test.mime>
-                            </systemPropertyVariables>
-                        </configuration>
-                    </plugin>
-                </plugins>
-            </build>
-        </profile>
-    </profiles>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+				<executions>
+					<execution>
+						<goals>
+							<goal>repackage</goal>
+						</goals>
+						<configuration>
+							<classifier>spring-boot</classifier>
+							<mainClass>org.baeldung.executable.ExecutableMavenJar</mainClass>
+						</configuration>
+					</execution>
+				</executions>
+			</plugin>
 
-    <properties>
-        <!-- marshalling -->
-        <jackson.version>2.8.5</jackson.version>
+			<plugin>
+				<groupId>org.codehaus.mojo</groupId>
+				<artifactId>exec-maven-plugin</artifactId>
+				<version>1.6.0</version>
+				<configuration>
+					<executable>java</executable>
+					<mainClass>com.baeldung.outofmemoryerror.OutOfMemoryGCLimitExceed</mainClass>
+					<arguments>
+						<argument>-Xmx300m</argument>
+						<argument>-XX:+UseParallelGC</argument>
+						<argument>-classpath</argument>
+						<classpath />
+						<argument>com.baeldung.outofmemoryerror.OutOfMemoryGCLimitExceed</argument>
+					</arguments>
+				</configuration>
+			</plugin>
+		</plugins>
 
-        <!-- logging -->
-        <org.slf4j.version>1.7.21</org.slf4j.version>
-        <logback.version>1.1.7</logback.version>
+	</build>
 
-        <!-- util -->
-        <guava.version>21.0</guava.version>
-        <commons-lang3.version>3.5</commons-lang3.version>
-        <bouncycastle.version>1.55</bouncycastle.version>
-        <commons-codec.version>1.10</commons-codec.version>
-        <commons-math3.version>3.6.1</commons-math3.version>
-        <decimal4j.version>1.0.3</decimal4j.version>
-        <commons-io.version>2.5</commons-io.version>
-        <commons-collections4.version>4.1</commons-collections4.version>
-        <collections-generic.version>4.01</collections-generic.version>
-        <unix4j.version>0.4</unix4j.version>
-        <grep4j.version>1.8.7</grep4j.version>
-        <lombok.version>1.16.12</lombok.version>
-        <fscontext.version>4.6-b01</fscontext.version>
+	<profiles>
+		<profile>
+			<id>integration</id>
+			<build>
+				<plugins>
+					<plugin>
+						<groupId>org.apache.maven.plugins</groupId>
+						<artifactId>maven-surefire-plugin</artifactId>
+						<executions>
+							<execution>
+								<phase>integration-test</phase>
+								<goals>
+									<goal>test</goal>
+								</goals>
+								<configuration>
+									<excludes>
+										<exclude>**/*ManualTest.java</exclude>
+									</excludes>
+									<includes>
+										<include>**/*IntegrationTest.java</include>
+									</includes>
+								</configuration>
+							</execution>
+						</executions>
+						<configuration>
+							<systemPropertyVariables>
+								<test.mime>json</test.mime>
+							</systemPropertyVariables>
+						</configuration>
+					</plugin>
+				</plugins>
+			</build>
+		</profile>
+	</profiles>
 
-        <!-- testing -->
-        <org.hamcrest.version>1.3</org.hamcrest.version>
-        <junit.version>4.12</junit.version>
-        <mockito.version>1.10.19</mockito.version>
-        <assertj.version>3.6.1</assertj.version>
-        <avaitility.version>1.7.0</avaitility.version>
+	<properties>
+		<!-- marshalling -->
+		<jackson.version>2.8.5</jackson.version>
 
-        <!-- maven plugins -->
-        <maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
-        <maven-surefire-plugin.version>2.19.1</maven-surefire-plugin.version>
+		<!-- logging -->
+		<org.slf4j.version>1.7.21</org.slf4j.version>
+		<logback.version>1.1.7</logback.version>
 
-    </properties>
+		<!-- util -->
+		<guava.version>21.0</guava.version>
+		<commons-lang3.version>3.5</commons-lang3.version>
+		<bouncycastle.version>1.55</bouncycastle.version>
+		<commons-codec.version>1.10</commons-codec.version>
+		<commons-math3.version>3.6.1</commons-math3.version>
+		<decimal4j.version>1.0.3</decimal4j.version>
+		<commons-io.version>2.5</commons-io.version>
+		<commons-collections4.version>4.1</commons-collections4.version>
+		<collections-generic.version>4.01</collections-generic.version>
+		<unix4j.version>0.4</unix4j.version>
+		<grep4j.version>1.8.7</grep4j.version>
+		<lombok.version>1.16.12</lombok.version>
+		<fscontext.version>4.6-b01</fscontext.version>
+
+		<!-- testing -->
+		<org.hamcrest.version>1.3</org.hamcrest.version>
+		<junit.version>4.12</junit.version>
+		<mockito.version>1.10.19</mockito.version>
+		<assertj.version>3.6.1</assertj.version>
+		<avaitility.version>1.7.0</avaitility.version>
+
+		<!-- maven plugins -->
+		<maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
+		<maven-surefire-plugin.version>2.19.1</maven-surefire-plugin.version>
+
+	</properties>
 </project>
\ No newline at end of file
diff --git a/core-java/src/main/java/com/baeldung/string/StringBufferStringBuilder.java b/core-java/src/main/java/com/baeldung/string/StringBufferStringBuilder.java
index 4623b83de0..74f489d57f 100644
--- a/core-java/src/main/java/com/baeldung/string/StringBufferStringBuilder.java
+++ b/core-java/src/main/java/com/baeldung/string/StringBufferStringBuilder.java
@@ -1,25 +1,46 @@
 package com.baeldung.string;
 
+import org.openjdk.jmh.annotations.Benchmark;
+import org.openjdk.jmh.annotations.Scope;
+import org.openjdk.jmh.annotations.State;
+import org.openjdk.jmh.runner.Runner;
+import org.openjdk.jmh.runner.RunnerException;
+import org.openjdk.jmh.runner.options.Options;
+import org.openjdk.jmh.runner.options.OptionsBuilder;
+
 public class StringBufferStringBuilder {
 
-    public static void main(String[] args) {
+    public static void main(String[] args) throws RunnerException {
 
-        int iterations = 10000000;
+        Options opt = new OptionsBuilder()
+            .include(StringBufferStringBuilder.class.getSimpleName())
+            .build();
 
-        System.gc();
-        long startTime = System.currentTimeMillis();
-        StringBuffer stringBuffer = new StringBuffer("abc");
-        for (int i = 0; i < iterations; i++) {
-            stringBuffer.append("def");
-        }
-        System.out.println("Time taken by StringBuffer: " + (System.currentTimeMillis() - startTime) + "ms"); // Time taken by StringBuffer: 394ms
-
-        System.gc();
-        startTime = System.currentTimeMillis();
-        StringBuilder stringBuilder = new StringBuilder("abc");
-        for (int i = 0; i < iterations; i++) {
-            stringBuilder.append("def");
-        }
-        System.out.println("Time taken by StringBuilder: " + (System.currentTimeMillis() - startTime) + "ms"); // Time taken by StringBuilder: 129ms
+        new Runner(opt).run();
     }
-}
+    
+    @State(Scope.Benchmark)
+    public static class MyState {
+        int iterations = 1000;
+        String initial = "abc";
+        String suffix = "def";
+    }
+     
+    @Benchmark
+    public StringBuffer benchmarkStringBuffer(MyState state) {
+        StringBuffer stringBuffer = new StringBuffer(state.initial);
+        for (int i = 0; i < state.iterations; i++) {
+            stringBuffer.append(state.suffix);
+        }
+        return stringBuffer;
+    }
+
+    @Benchmark
+    public StringBuilder benchmarkStringBuilder(MyState state) {
+        StringBuilder stringBuilder = new StringBuilder(state.initial);
+        for (int i = 0; i < state.iterations; i++) {
+            stringBuilder.append(state.suffix);
+        }
+        return stringBuilder;
+    }
+}
\ No newline at end of file