diff --git a/gradle-6/.gitignore b/gradle-6/.gitignore
new file mode 100644
index 0000000000..6987887957
--- /dev/null
+++ b/gradle-6/.gitignore
@@ -0,0 +1,18 @@
+
+# Gradle
+
+.gradle
+build
+
+# Ignore Gradle GUI config
+gradle-app.setting
+
+# Avoid ignoring Gradle wrapper jar file (.jar files are usually ignored)
+!gradle-wrapper.jar
+
+# Cache of project
+.gradletasknamecache
+
+# # Work around https://youtrack.jetbrains.com/issue/IDEA-116898
+# gradle/wrapper/gradle-wrapper.properties
+
diff --git a/gradle-6/build.gradle.kts b/gradle-6/build.gradle.kts
new file mode 100644
index 0000000000..fb3c3f88a2
--- /dev/null
+++ b/gradle-6/build.gradle.kts
@@ -0,0 +1,5 @@
+subprojects {
+    repositories {
+        mavenCentral()
+    }
+}
\ No newline at end of file
diff --git a/gradle-6/configuration-avoidance/build.gradle.kts b/gradle-6/configuration-avoidance/build.gradle.kts
new file mode 100644
index 0000000000..e84f08bf93
--- /dev/null
+++ b/gradle-6/configuration-avoidance/build.gradle.kts
@@ -0,0 +1,37 @@
+plugins {
+    base
+}
+
+description = """
+    Demonstrates Gradle Configuraiton Avoidance API. Creates a new configuration "extralibs" to 
+    which we add dependencies. The custom task "copyExtraLibs" copies those dependencies to a new 
+    build directory "extra-libs". This build uses the Task Configuraion Avoidance APIs which have 
+    been marked stable in Gradle 6.0
+""".trimIndent()
+
+// extraLibs is a NamedDomainObjectProvider<Configuration!> - the Configuration object will not be
+// realized until it is needed. In the meantime, the build may reference it by name
+val extralibs by configurations.registering
+
+dependencies {
+    // we can call extralibs.name without causing the extralibs to be realized
+    add(extralibs.name, "junit:junit:4.12")
+}
+
+// extraLibsDir is a Provider<Directory!> - the Directory object will not be realized until it is
+// needed
+val extraLibsDir = project.layout.buildDirectory.dir("extra-libs")
+
+// copyExtraLibs is a TaskProvider<Copy!> - the task will not be realized until it is needed
+val copyExtraLibs by tasks.registering(Copy::class) {
+    // the copy task's "from" and "into" APIs accept Provider types to support configuration
+    // avoidance
+    from(extralibs)
+    into(extraLibsDir)
+}
+
+// configures the "build" task only if it needs to be
+tasks.build {
+    // dependsOn accepts a TaskProvider to avoid realizing the copyExtraLibs needlessly
+    dependsOn(copyExtraLibs)
+}
diff --git a/gradle-6/dependency-constraints/build.gradle.kts b/gradle-6/dependency-constraints/build.gradle.kts
new file mode 100644
index 0000000000..41336d3c91
--- /dev/null
+++ b/gradle-6/dependency-constraints/build.gradle.kts
@@ -0,0 +1,29 @@
+plugins {
+    `java-library`
+}
+
+group = "com.baeldung"
+version = "1.0.0"
+
+dependencies {
+    api("io.reactivex.rxjava2:rxjava:2.2.16")
+    implementation("com.google.guava:guava") {
+        version {
+            require("10.0")
+            prefer("28.1-jre")
+            because("Only uses ImmutableList type, so any version since 2.0 will do, but tested with 28.1-jre")
+        }
+    }
+
+    testImplementation("org.junit.jupiter:junit-jupiter-api:5.5.2")
+    testRuntimeOnly("org.junit.jupiter:junit-jupiter-engine:5.5.2")
+}
+
+tasks.compileJava {
+    sourceCompatibility = "1.8"
+    targetCompatibility = "1.8"
+}
+
+tasks.test {
+    useJUnitPlatform()
+}
diff --git a/gradle-6/dependency-constraints/src/main/java/com/baeldung/gradle/RxHelloWorld.java b/gradle-6/dependency-constraints/src/main/java/com/baeldung/gradle/RxHelloWorld.java
new file mode 100644
index 0000000000..e4ebd9ba6b
--- /dev/null
+++ b/gradle-6/dependency-constraints/src/main/java/com/baeldung/gradle/RxHelloWorld.java
@@ -0,0 +1,24 @@
+package com.baeldung.gradle;
+
+import com.google.common.collect.ImmutableList;
+import io.reactivex.Observable;
+
+import java.util.List;
+
+/**
+ * Demonstrates a library type that returns an RxJava type.
+ */
+public class RxHelloWorld {
+
+    /**
+     * @return an {@link Observable} that emits events "hello" and "world" before completing.
+     */
+    public static Observable<String> hello() {
+        // Guava ImmutableList class is an implementation detail.
+        List<String> values = ImmutableList.of("hello", "world");
+        return Observable.fromIterable(values);
+    }
+
+    private RxHelloWorld() {
+    }
+}
diff --git a/gradle-6/dependency-constraints/src/test/java/com/baeldung/gradle/RxHelloWorldUnitTest.java b/gradle-6/dependency-constraints/src/test/java/com/baeldung/gradle/RxHelloWorldUnitTest.java
new file mode 100644
index 0000000000..8a05fcfda3
--- /dev/null
+++ b/gradle-6/dependency-constraints/src/test/java/com/baeldung/gradle/RxHelloWorldUnitTest.java
@@ -0,0 +1,14 @@
+package com.baeldung.gradle;
+
+import org.junit.jupiter.api.Test;
+
+import static com.baeldung.gradle.RxHelloWorld.hello;
+
+/**
+ * Unit test for {@link RxHelloWorld}.
+ */
+final class RxHelloWorldUnitTest {
+    @Test void it_emits_hello_world_values() {
+        hello().test().assertValues("hello", "world").assertComplete();
+    }
+}
diff --git a/gradle-6/fibonacci-recursive/build.gradle.kts b/gradle-6/fibonacci-recursive/build.gradle.kts
new file mode 100644
index 0000000000..0872a52472
--- /dev/null
+++ b/gradle-6/fibonacci-recursive/build.gradle.kts
@@ -0,0 +1,17 @@
+plugins {
+    `java-library`
+}
+
+dependencies {
+    api(project(":fibonacci-spi"))
+    compileOnly("com.google.auto.service:auto-service-annotations:1.0-rc6")
+    annotationProcessor("com.google.auto.service:auto-service:1.0-rc6")
+
+    testImplementation(testFixtures(project(":fibonacci-spi")))
+    testImplementation("org.junit.jupiter:junit-jupiter-api:5.5.2")
+    testRuntimeOnly("org.junit.jupiter:junit-jupiter-engine:5.5.2")
+}
+
+tasks.test {
+    useJUnitPlatform()
+}
\ No newline at end of file
diff --git a/gradle-6/fibonacci-recursive/src/main/java/com/baeldung/fibonacci/impl/RecursiveFibonacci.java b/gradle-6/fibonacci-recursive/src/main/java/com/baeldung/fibonacci/impl/RecursiveFibonacci.java
new file mode 100644
index 0000000000..def79521bd
--- /dev/null
+++ b/gradle-6/fibonacci-recursive/src/main/java/com/baeldung/fibonacci/impl/RecursiveFibonacci.java
@@ -0,0 +1,20 @@
+package com.baeldung.fibonacci.impl;
+
+import com.baeldung.fibonacci.FibonacciSequenceGenerator;
+import com.google.auto.service.AutoService;
+
+/**
+ * Recursive implementation of the {@link FibonacciSequenceGenerator}.
+ */
+@AutoService(FibonacciSequenceGenerator.class) public final class RecursiveFibonacci implements FibonacciSequenceGenerator {
+
+    @Override public int generate(int nth) {
+        if (nth < 0) {
+            throw new IllegalArgumentException("sequence number must be 0 or greater");
+        }
+        if (nth <= 1) {
+            return nth;
+        }
+        return generate(nth - 1) + generate(nth - 2);
+    }
+}
diff --git a/gradle-6/fibonacci-recursive/src/test/java/com/baeldung/fibonacci/impl/RecursiveFibonacciUnitTest.java b/gradle-6/fibonacci-recursive/src/test/java/com/baeldung/fibonacci/impl/RecursiveFibonacciUnitTest.java
new file mode 100644
index 0000000000..766f3b251b
--- /dev/null
+++ b/gradle-6/fibonacci-recursive/src/test/java/com/baeldung/fibonacci/impl/RecursiveFibonacciUnitTest.java
@@ -0,0 +1,13 @@
+package com.baeldung.fibonacci.impl;
+
+import com.baeldung.fibonacci.FibonacciSequenceGenerator;
+import com.baeldung.fibonacci.FibonacciSequenceGeneratorFixture;
+
+/**
+ * Unit test which reuses the {@link FibonacciSequenceGeneratorFixture} test mix-in exported from the fibonacci-spi project.
+ */
+final class RecursiveFibonacciUnitTest implements FibonacciSequenceGeneratorFixture {
+    @Override public FibonacciSequenceGenerator provide() {
+        return new RecursiveFibonacci();
+    }
+}
diff --git a/gradle-6/fibonacci-spi/build.gradle.kts b/gradle-6/fibonacci-spi/build.gradle.kts
new file mode 100644
index 0000000000..e571f329a9
--- /dev/null
+++ b/gradle-6/fibonacci-spi/build.gradle.kts
@@ -0,0 +1,13 @@
+plugins {
+    `java-library`
+    `java-test-fixtures`
+}
+
+dependencies {
+    testFixturesApi("org.junit.jupiter:junit-jupiter-api:5.5.2")
+    testFixturesImplementation("org.junit.jupiter:junit-jupiter-engine:5.5.2")
+}
+
+tasks.test {
+    useJUnitPlatform()
+}
\ No newline at end of file
diff --git a/gradle-6/fibonacci-spi/src/main/java/com/baeldung/fibonacci/FibonacciSequenceGenerator.java b/gradle-6/fibonacci-spi/src/main/java/com/baeldung/fibonacci/FibonacciSequenceGenerator.java
new file mode 100644
index 0000000000..5fd99100fc
--- /dev/null
+++ b/gradle-6/fibonacci-spi/src/main/java/com/baeldung/fibonacci/FibonacciSequenceGenerator.java
@@ -0,0 +1,13 @@
+package com.baeldung.fibonacci;
+
+/**
+ * Describes an SPI for a Fibonacci sequence generator function.
+ */
+public interface FibonacciSequenceGenerator {
+
+    /**
+     * @param nth the index of the number in the fibonacci sequence
+     * @return the nth number in the fibonacci sequence
+     */
+    int generate(int nth);
+}
diff --git a/gradle-6/fibonacci-spi/src/testFixtures/java/com/baeldung/fibonacci/FibonacciSequenceGeneratorFixture.java b/gradle-6/fibonacci-spi/src/testFixtures/java/com/baeldung/fibonacci/FibonacciSequenceGeneratorFixture.java
new file mode 100644
index 0000000000..5394590c03
--- /dev/null
+++ b/gradle-6/fibonacci-spi/src/testFixtures/java/com/baeldung/fibonacci/FibonacciSequenceGeneratorFixture.java
@@ -0,0 +1,30 @@
+package com.baeldung.fibonacci;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+/**
+ * Reusable test fixture for {@link FibonacciSequenceGenerator} implementations. Tests will be skipped if no such implementation exists.
+ */
+public interface FibonacciSequenceGeneratorFixture {
+
+    /**
+     * @return the implementation of {@link FibonacciSequenceGenerator} to test. Must not be null
+     */
+    FibonacciSequenceGenerator provide();
+
+    @Test default void when_sequence_index_is_negative_then_throws() {
+        final FibonacciSequenceGenerator generator = provide();
+        assertThrows(IllegalArgumentException.class, () -> generator.generate(-1));
+    }
+
+    @Test default void when_given_index_then_generates_fibonacci_number() {
+        final FibonacciSequenceGenerator generator = provide();
+        final int[] sequence = { 0, 1, 1, 2, 3, 5, 8 };
+        for (int i = 0; i < sequence.length; i++) {
+            assertEquals(sequence[i], generator.generate(i));
+        }
+    }
+}
diff --git a/gradle-6/gradle.properties b/gradle-6/gradle.properties
new file mode 100644
index 0000000000..7da8b3d72a
--- /dev/null
+++ b/gradle-6/gradle.properties
@@ -0,0 +1,2 @@
+org.gradle.parallel=true
+org.gradle.configureondemand=true
diff --git a/gradle-6/gradle/wrapper/gradle-wrapper.jar b/gradle-6/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000000..cc4fdc293d
Binary files /dev/null and b/gradle-6/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle-6/gradle/wrapper/gradle-wrapper.properties b/gradle-6/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000000..94920145f3
--- /dev/null
+++ b/gradle-6/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.0.1-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/gradle-6/gradlew b/gradle-6/gradlew
new file mode 100755
index 0000000000..2fe81a7d95
--- /dev/null
+++ b/gradle-6/gradlew
@@ -0,0 +1,183 @@
+#!/usr/bin/env sh
+
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=`expr $i + 1`
+    done
+    case $i in
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=`save "$@"`
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+exec "$JAVACMD" "$@"
diff --git a/gradle-6/gradlew.bat b/gradle-6/gradlew.bat
new file mode 100644
index 0000000000..24467a141f
--- /dev/null
+++ b/gradle-6/gradlew.bat
@@ -0,0 +1,100 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/gradle-6/httpclient-platform/build.gradle.kts b/gradle-6/httpclient-platform/build.gradle.kts
new file mode 100644
index 0000000000..a021bff013
--- /dev/null
+++ b/gradle-6/httpclient-platform/build.gradle.kts
@@ -0,0 +1,11 @@
+plugins {
+    `java-platform`
+}
+
+dependencies {
+    constraints {
+        api("org.apache.httpcomponents:fluent-hc:4.5.10")
+        api("org.apache.httpcomponents:httpclient:4.5.10")
+        runtime("commons-logging:commons-logging:1.2")
+    }
+}
\ No newline at end of file
diff --git a/gradle-6/module-metadata-publishing/build.gradle.kts b/gradle-6/module-metadata-publishing/build.gradle.kts
new file mode 100644
index 0000000000..9812c72f6f
--- /dev/null
+++ b/gradle-6/module-metadata-publishing/build.gradle.kts
@@ -0,0 +1,12 @@
+plugins {
+    java
+    `maven-publish`
+}
+
+publishing {
+    publications {
+        register<MavenPublication>("mavenJava") {
+            from(components["java"])
+        }
+    }
+}
\ No newline at end of file
diff --git a/gradle-6/person-rest-client/build.gradle.kts b/gradle-6/person-rest-client/build.gradle.kts
new file mode 100644
index 0000000000..c562b3e164
--- /dev/null
+++ b/gradle-6/person-rest-client/build.gradle.kts
@@ -0,0 +1,8 @@
+plugins {
+    `java-library`
+}
+
+dependencies {
+    api(platform(project(":httpclient-platform")))
+    implementation("org.apache.httpcomponents:fluent-hc")
+}
\ No newline at end of file
diff --git a/gradle-6/settings.gradle.kts b/gradle-6/settings.gradle.kts
new file mode 100644
index 0000000000..88cf74c4d7
--- /dev/null
+++ b/gradle-6/settings.gradle.kts
@@ -0,0 +1,10 @@
+rootProject.name = "gradle-6"
+
+include("configuration-avoidance")
+include("dependency-constraints")
+include("fibonacci-spi")
+include("fibonacci-recursive")
+include("httpclient-platform")
+include("module-metadata-publishing")
+include("person-rest-client")
+include("widget-rest-client")
\ No newline at end of file
diff --git a/gradle-6/widget-rest-client/build.gradle.kts b/gradle-6/widget-rest-client/build.gradle.kts
new file mode 100644
index 0000000000..e1af4b7f71
--- /dev/null
+++ b/gradle-6/widget-rest-client/build.gradle.kts
@@ -0,0 +1,8 @@
+plugins {
+    `java-library`
+}
+
+dependencies {
+    api(platform(project(":httpclient-platform")))
+    implementation("org.apache.httpcomponents:httpclient")
+}
\ No newline at end of file