diff --git a/onboarding-java/.gitignore b/onboarding-java/.gitignore
new file mode 100644
index 0000000..549e00a
--- /dev/null
+++ b/onboarding-java/.gitignore
@@ -0,0 +1,33 @@
+HELP.md
+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**/target/
+!**/src/test/**/target/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### VS Code ###
+.vscode/
diff --git a/onboarding-java/.mvn/wrapper/maven-wrapper.jar b/onboarding-java/.mvn/wrapper/maven-wrapper.jar
new file mode 100644
index 0000000..c1dd12f
Binary files /dev/null and b/onboarding-java/.mvn/wrapper/maven-wrapper.jar differ
diff --git a/onboarding-java/.mvn/wrapper/maven-wrapper.properties b/onboarding-java/.mvn/wrapper/maven-wrapper.properties
new file mode 100644
index 0000000..b7cb93e
--- /dev/null
+++ b/onboarding-java/.mvn/wrapper/maven-wrapper.properties
@@ -0,0 +1,2 @@
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.8.4/apache-maven-3.8.4-bin.zip
+wrapperUrl=https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.1.0/maven-wrapper-3.1.0.jar
diff --git a/onboarding-java/mvnw b/onboarding-java/mvnw
new file mode 100644
index 0000000..8a8fb22
--- /dev/null
+++ b/onboarding-java/mvnw
@@ -0,0 +1,316 @@
+#!/bin/sh
+# ----------------------------------------------------------------------------
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements. See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership. The ASF licenses this file
+# to you 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.
+# ----------------------------------------------------------------------------
+
+# ----------------------------------------------------------------------------
+# Maven Start Up Batch script
+#
+# Required ENV vars:
+# ------------------
+# JAVA_HOME - location of a JDK home dir
+#
+# Optional ENV vars
+# -----------------
+# M2_HOME - location of maven2's installed home dir
+# MAVEN_OPTS - parameters passed to the Java VM when running Maven
+# e.g. to debug Maven itself, use
+# set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+# MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+# ----------------------------------------------------------------------------
+
+if [ -z "$MAVEN_SKIP_RC" ] ; then
+
+ if [ -f /usr/local/etc/mavenrc ] ; then
+ . /usr/local/etc/mavenrc
+ fi
+
+ if [ -f /etc/mavenrc ] ; then
+ . /etc/mavenrc
+ fi
+
+ if [ -f "$HOME/.mavenrc" ] ; then
+ . "$HOME/.mavenrc"
+ fi
+
+fi
+
+# OS specific support. $var _must_ be set to either true or false.
+cygwin=false;
+darwin=false;
+mingw=false
+case "`uname`" in
+ CYGWIN*) cygwin=true ;;
+ MINGW*) mingw=true;;
+ Darwin*) darwin=true
+ # Use /usr/libexec/java_home if available, otherwise fall back to /Library/Java/Home
+ # See https://developer.apple.com/library/mac/qa/qa1170/_index.html
+ if [ -z "$JAVA_HOME" ]; then
+ if [ -x "/usr/libexec/java_home" ]; then
+ export JAVA_HOME="`/usr/libexec/java_home`"
+ else
+ export JAVA_HOME="/Library/Java/Home"
+ fi
+ fi
+ ;;
+esac
+
+if [ -z "$JAVA_HOME" ] ; then
+ if [ -r /etc/gentoo-release ] ; then
+ JAVA_HOME=`java-config --jre-home`
+ fi
+fi
+
+if [ -z "$M2_HOME" ] ; then
+ ## resolve links - $0 may be a link to maven's home
+ 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"`/$link"
+ fi
+ done
+
+ saveddir=`pwd`
+
+ M2_HOME=`dirname "$PRG"`/..
+
+ # make it fully qualified
+ M2_HOME=`cd "$M2_HOME" && pwd`
+
+ cd "$saveddir"
+ # echo Using m2 at $M2_HOME
+fi
+
+# For Cygwin, ensure paths are in UNIX format before anything is touched
+if $cygwin ; then
+ [ -n "$M2_HOME" ] &&
+ M2_HOME=`cygpath --unix "$M2_HOME"`
+ [ -n "$JAVA_HOME" ] &&
+ JAVA_HOME=`cygpath --unix "$JAVA_HOME"`
+ [ -n "$CLASSPATH" ] &&
+ CLASSPATH=`cygpath --path --unix "$CLASSPATH"`
+fi
+
+# For Mingw, ensure paths are in UNIX format before anything is touched
+if $mingw ; then
+ [ -n "$M2_HOME" ] &&
+ M2_HOME="`(cd "$M2_HOME"; pwd)`"
+ [ -n "$JAVA_HOME" ] &&
+ JAVA_HOME="`(cd "$JAVA_HOME"; pwd)`"
+fi
+
+if [ -z "$JAVA_HOME" ]; then
+ javaExecutable="`which javac`"
+ if [ -n "$javaExecutable" ] && ! [ "`expr \"$javaExecutable\" : '\([^ ]*\)'`" = "no" ]; then
+ # readlink(1) is not available as standard on Solaris 10.
+ readLink=`which readlink`
+ if [ ! `expr "$readLink" : '\([^ ]*\)'` = "no" ]; then
+ if $darwin ; then
+ javaHome="`dirname \"$javaExecutable\"`"
+ javaExecutable="`cd \"$javaHome\" && pwd -P`/javac"
+ else
+ javaExecutable="`readlink -f \"$javaExecutable\"`"
+ fi
+ javaHome="`dirname \"$javaExecutable\"`"
+ javaHome=`expr "$javaHome" : '\(.*\)/bin'`
+ JAVA_HOME="$javaHome"
+ export JAVA_HOME
+ fi
+ fi
+fi
+
+if [ -z "$JAVACMD" ] ; then
+ 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
+ else
+ JAVACMD="`\\unset -f command; \\command -v java`"
+ fi
+fi
+
+if [ ! -x "$JAVACMD" ] ; then
+ echo "Error: JAVA_HOME is not defined correctly." >&2
+ echo " We cannot execute $JAVACMD" >&2
+ exit 1
+fi
+
+if [ -z "$JAVA_HOME" ] ; then
+ echo "Warning: JAVA_HOME environment variable is not set."
+fi
+
+CLASSWORLDS_LAUNCHER=org.codehaus.plexus.classworlds.launcher.Launcher
+
+# traverses directory structure from process work directory to filesystem root
+# first directory with .mvn subdirectory is considered project base directory
+find_maven_basedir() {
+
+ if [ -z "$1" ]
+ then
+ echo "Path not specified to find_maven_basedir"
+ return 1
+ fi
+
+ basedir="$1"
+ wdir="$1"
+ while [ "$wdir" != '/' ] ; do
+ if [ -d "$wdir"/.mvn ] ; then
+ basedir=$wdir
+ break
+ fi
+ # workaround for JBEAP-8937 (on Solaris 10/Sparc)
+ if [ -d "${wdir}" ]; then
+ wdir=`cd "$wdir/.."; pwd`
+ fi
+ # end of workaround
+ done
+ echo "${basedir}"
+}
+
+# concatenates all lines of a file
+concat_lines() {
+ if [ -f "$1" ]; then
+ echo "$(tr -s '\n' ' ' < "$1")"
+ fi
+}
+
+BASE_DIR=`find_maven_basedir "$(pwd)"`
+if [ -z "$BASE_DIR" ]; then
+ exit 1;
+fi
+
+##########################################################################################
+# Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
+# This allows using the maven wrapper in projects that prohibit checking in binary data.
+##########################################################################################
+if [ -r "$BASE_DIR/.mvn/wrapper/maven-wrapper.jar" ]; then
+ if [ "$MVNW_VERBOSE" = true ]; then
+ echo "Found .mvn/wrapper/maven-wrapper.jar"
+ fi
+else
+ if [ "$MVNW_VERBOSE" = true ]; then
+ echo "Couldn't find .mvn/wrapper/maven-wrapper.jar, downloading it ..."
+ fi
+ if [ -n "$MVNW_REPOURL" ]; then
+ jarUrl="$MVNW_REPOURL/org/apache/maven/wrapper/maven-wrapper/3.1.0/maven-wrapper-3.1.0.jar"
+ else
+ jarUrl="https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.1.0/maven-wrapper-3.1.0.jar"
+ fi
+ while IFS="=" read key value; do
+ case "$key" in (wrapperUrl) jarUrl="$value"; break ;;
+ esac
+ done < "$BASE_DIR/.mvn/wrapper/maven-wrapper.properties"
+ if [ "$MVNW_VERBOSE" = true ]; then
+ echo "Downloading from: $jarUrl"
+ fi
+ wrapperJarPath="$BASE_DIR/.mvn/wrapper/maven-wrapper.jar"
+ if $cygwin; then
+ wrapperJarPath=`cygpath --path --windows "$wrapperJarPath"`
+ fi
+
+ if command -v wget > /dev/null; then
+ if [ "$MVNW_VERBOSE" = true ]; then
+ echo "Found wget ... using wget"
+ fi
+ if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+ wget "$jarUrl" -O "$wrapperJarPath" || rm -f "$wrapperJarPath"
+ else
+ wget --http-user=$MVNW_USERNAME --http-password=$MVNW_PASSWORD "$jarUrl" -O "$wrapperJarPath" || rm -f "$wrapperJarPath"
+ fi
+ elif command -v curl > /dev/null; then
+ if [ "$MVNW_VERBOSE" = true ]; then
+ echo "Found curl ... using curl"
+ fi
+ if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+ curl -o "$wrapperJarPath" "$jarUrl" -f
+ else
+ curl --user $MVNW_USERNAME:$MVNW_PASSWORD -o "$wrapperJarPath" "$jarUrl" -f
+ fi
+
+ else
+ if [ "$MVNW_VERBOSE" = true ]; then
+ echo "Falling back to using Java to download"
+ fi
+ javaClass="$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.java"
+ # For Cygwin, switch paths to Windows format before running javac
+ if $cygwin; then
+ javaClass=`cygpath --path --windows "$javaClass"`
+ fi
+ if [ -e "$javaClass" ]; then
+ if [ ! -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then
+ if [ "$MVNW_VERBOSE" = true ]; then
+ echo " - Compiling MavenWrapperDownloader.java ..."
+ fi
+ # Compiling the Java class
+ ("$JAVA_HOME/bin/javac" "$javaClass")
+ fi
+ if [ -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then
+ # Running the downloader
+ if [ "$MVNW_VERBOSE" = true ]; then
+ echo " - Running MavenWrapperDownloader.java ..."
+ fi
+ ("$JAVA_HOME/bin/java" -cp .mvn/wrapper MavenWrapperDownloader "$MAVEN_PROJECTBASEDIR")
+ fi
+ fi
+ fi
+fi
+##########################################################################################
+# End of extension
+##########################################################################################
+
+export MAVEN_PROJECTBASEDIR=${MAVEN_BASEDIR:-"$BASE_DIR"}
+if [ "$MVNW_VERBOSE" = true ]; then
+ echo $MAVEN_PROJECTBASEDIR
+fi
+MAVEN_OPTS="$(concat_lines "$MAVEN_PROJECTBASEDIR/.mvn/jvm.config") $MAVEN_OPTS"
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin; then
+ [ -n "$M2_HOME" ] &&
+ M2_HOME=`cygpath --path --windows "$M2_HOME"`
+ [ -n "$JAVA_HOME" ] &&
+ JAVA_HOME=`cygpath --path --windows "$JAVA_HOME"`
+ [ -n "$CLASSPATH" ] &&
+ CLASSPATH=`cygpath --path --windows "$CLASSPATH"`
+ [ -n "$MAVEN_PROJECTBASEDIR" ] &&
+ MAVEN_PROJECTBASEDIR=`cygpath --path --windows "$MAVEN_PROJECTBASEDIR"`
+fi
+
+# Provide a "standardized" way to retrieve the CLI args that will
+# work with both Windows and non-Windows executions.
+MAVEN_CMD_LINE_ARGS="$MAVEN_CONFIG $@"
+export MAVEN_CMD_LINE_ARGS
+
+WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+exec "$JAVACMD" \
+ $MAVEN_OPTS \
+ $MAVEN_DEBUG_OPTS \
+ -classpath "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar" \
+ "-Dmaven.home=${M2_HOME}" \
+ "-Dmaven.multiModuleProjectDirectory=${MAVEN_PROJECTBASEDIR}" \
+ ${WRAPPER_LAUNCHER} $MAVEN_CONFIG "$@"
diff --git a/onboarding-java/mvnw.cmd b/onboarding-java/mvnw.cmd
new file mode 100644
index 0000000..1d8ab01
--- /dev/null
+++ b/onboarding-java/mvnw.cmd
@@ -0,0 +1,188 @@
+@REM ----------------------------------------------------------------------------
+@REM Licensed to the Apache Software Foundation (ASF) under one
+@REM or more contributor license agreements. See the NOTICE file
+@REM distributed with this work for additional information
+@REM regarding copyright ownership. The ASF licenses this file
+@REM to you under the Apache License, Version 2.0 (the
+@REM "License"); you may not use this file except in compliance
+@REM with the License. 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,
+@REM software distributed under the License is distributed on an
+@REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+@REM KIND, either express or implied. See the License for the
+@REM specific language governing permissions and limitations
+@REM under the License.
+@REM ----------------------------------------------------------------------------
+
+@REM ----------------------------------------------------------------------------
+@REM Maven Start Up Batch script
+@REM
+@REM Required ENV vars:
+@REM JAVA_HOME - location of a JDK home dir
+@REM
+@REM Optional ENV vars
+@REM M2_HOME - location of maven2's installed home dir
+@REM MAVEN_BATCH_ECHO - set to 'on' to enable the echoing of the batch commands
+@REM MAVEN_BATCH_PAUSE - set to 'on' to wait for a keystroke before ending
+@REM MAVEN_OPTS - parameters passed to the Java VM when running Maven
+@REM e.g. to debug Maven itself, use
+@REM set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+@REM MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+@REM ----------------------------------------------------------------------------
+
+@REM Begin all REM lines with '@' in case MAVEN_BATCH_ECHO is 'on'
+@echo off
+@REM set title of command window
+title %0
+@REM enable echoing by setting MAVEN_BATCH_ECHO to 'on'
+@if "%MAVEN_BATCH_ECHO%" == "on" echo %MAVEN_BATCH_ECHO%
+
+@REM set %HOME% to equivalent of $HOME
+if "%HOME%" == "" (set "HOME=%HOMEDRIVE%%HOMEPATH%")
+
+@REM Execute a user defined script before this one
+if not "%MAVEN_SKIP_RC%" == "" goto skipRcPre
+@REM check for pre script, once with legacy .bat ending and once with .cmd ending
+if exist "%USERPROFILE%\mavenrc_pre.bat" call "%USERPROFILE%\mavenrc_pre.bat" %*
+if exist "%USERPROFILE%\mavenrc_pre.cmd" call "%USERPROFILE%\mavenrc_pre.cmd" %*
+:skipRcPre
+
+@setlocal
+
+set ERROR_CODE=0
+
+@REM To isolate internal variables from possible post scripts, we use another setlocal
+@setlocal
+
+@REM ==== START VALIDATION ====
+if not "%JAVA_HOME%" == "" goto OkJHome
+
+echo.
+echo Error: JAVA_HOME not found in your environment. >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+:OkJHome
+if exist "%JAVA_HOME%\bin\java.exe" goto init
+
+echo.
+echo Error: JAVA_HOME is set to an invalid directory. >&2
+echo JAVA_HOME = "%JAVA_HOME%" >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+@REM ==== END VALIDATION ====
+
+:init
+
+@REM Find the project base dir, i.e. the directory that contains the folder ".mvn".
+@REM Fallback to current working directory if not found.
+
+set MAVEN_PROJECTBASEDIR=%MAVEN_BASEDIR%
+IF NOT "%MAVEN_PROJECTBASEDIR%"=="" goto endDetectBaseDir
+
+set EXEC_DIR=%CD%
+set WDIR=%EXEC_DIR%
+:findBaseDir
+IF EXIST "%WDIR%"\.mvn goto baseDirFound
+cd ..
+IF "%WDIR%"=="%CD%" goto baseDirNotFound
+set WDIR=%CD%
+goto findBaseDir
+
+:baseDirFound
+set MAVEN_PROJECTBASEDIR=%WDIR%
+cd "%EXEC_DIR%"
+goto endDetectBaseDir
+
+:baseDirNotFound
+set MAVEN_PROJECTBASEDIR=%EXEC_DIR%
+cd "%EXEC_DIR%"
+
+:endDetectBaseDir
+
+IF NOT EXIST "%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config" goto endReadAdditionalConfig
+
+@setlocal EnableExtensions EnableDelayedExpansion
+for /F "usebackq delims=" %%a in ("%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config") do set JVM_CONFIG_MAVEN_PROPS=!JVM_CONFIG_MAVEN_PROPS! %%a
+@endlocal & set JVM_CONFIG_MAVEN_PROPS=%JVM_CONFIG_MAVEN_PROPS%
+
+:endReadAdditionalConfig
+
+SET MAVEN_JAVA_EXE="%JAVA_HOME%\bin\java.exe"
+set WRAPPER_JAR="%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.jar"
+set WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+set DOWNLOAD_URL="https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.1.0/maven-wrapper-3.1.0.jar"
+
+FOR /F "usebackq tokens=1,2 delims==" %%A IN ("%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.properties") DO (
+ IF "%%A"=="wrapperUrl" SET DOWNLOAD_URL=%%B
+)
+
+@REM Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
+@REM This allows using the maven wrapper in projects that prohibit checking in binary data.
+if exist %WRAPPER_JAR% (
+ if "%MVNW_VERBOSE%" == "true" (
+ echo Found %WRAPPER_JAR%
+ )
+) else (
+ if not "%MVNW_REPOURL%" == "" (
+ SET DOWNLOAD_URL="%MVNW_REPOURL%/org/apache/maven/wrapper/maven-wrapper/3.1.0/maven-wrapper-3.1.0.jar"
+ )
+ if "%MVNW_VERBOSE%" == "true" (
+ echo Couldn't find %WRAPPER_JAR%, downloading it ...
+ echo Downloading from: %DOWNLOAD_URL%
+ )
+
+ powershell -Command "&{"^
+ "$webclient = new-object System.Net.WebClient;"^
+ "if (-not ([string]::IsNullOrEmpty('%MVNW_USERNAME%') -and [string]::IsNullOrEmpty('%MVNW_PASSWORD%'))) {"^
+ "$webclient.Credentials = new-object System.Net.NetworkCredential('%MVNW_USERNAME%', '%MVNW_PASSWORD%');"^
+ "}"^
+ "[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; $webclient.DownloadFile('%DOWNLOAD_URL%', '%WRAPPER_JAR%')"^
+ "}"
+ if "%MVNW_VERBOSE%" == "true" (
+ echo Finished downloading %WRAPPER_JAR%
+ )
+)
+@REM End of extension
+
+@REM Provide a "standardized" way to retrieve the CLI args that will
+@REM work with both Windows and non-Windows executions.
+set MAVEN_CMD_LINE_ARGS=%*
+
+%MAVEN_JAVA_EXE% ^
+ %JVM_CONFIG_MAVEN_PROPS% ^
+ %MAVEN_OPTS% ^
+ %MAVEN_DEBUG_OPTS% ^
+ -classpath %WRAPPER_JAR% ^
+ "-Dmaven.multiModuleProjectDirectory=%MAVEN_PROJECTBASEDIR%" ^
+ %WRAPPER_LAUNCHER% %MAVEN_CONFIG% %*
+if ERRORLEVEL 1 goto error
+goto end
+
+:error
+set ERROR_CODE=1
+
+:end
+@endlocal & set ERROR_CODE=%ERROR_CODE%
+
+if not "%MAVEN_SKIP_RC%"=="" goto skipRcPost
+@REM check for post script, once with legacy .bat ending and once with .cmd ending
+if exist "%USERPROFILE%\mavenrc_post.bat" call "%USERPROFILE%\mavenrc_post.bat"
+if exist "%USERPROFILE%\mavenrc_post.cmd" call "%USERPROFILE%\mavenrc_post.cmd"
+:skipRcPost
+
+@REM pause the script if MAVEN_BATCH_PAUSE is set to 'on'
+if "%MAVEN_BATCH_PAUSE%"=="on" pause
+
+if "%MAVEN_TERMINATE_CMD%"=="on" exit %ERROR_CODE%
+
+cmd /C exit /B %ERROR_CODE%
diff --git a/onboarding-java/pom.xml b/onboarding-java/pom.xml
new file mode 100644
index 0000000..7e9f31a
--- /dev/null
+++ b/onboarding-java/pom.xml
@@ -0,0 +1,41 @@
+
+
+ 4.0.0
+
+ org.springframework.boot
+ spring-boot-starter-parent
+ 2.6.4
+
+
+ com.gdn.onboarding.java
+ onboarding-java
+ 0.0.1-SNAPSHOT
+ Onboarding Java
+ Demo project for Spring Boot
+
+ 1.8
+
+
+
+ org.springframework.boot
+ spring-boot-starter
+
+
+
+ org.springframework.boot
+ spring-boot-starter-test
+ test
+
+
+
+
+
+
+ org.springframework.boot
+ spring-boot-maven-plugin
+
+
+
+
+
diff --git a/onboarding-java/src/main/java/com/gdn/onboarding/java/onboardingjava/OnboardingJavaApplication.java b/onboarding-java/src/main/java/com/gdn/onboarding/java/onboardingjava/OnboardingJavaApplication.java
new file mode 100644
index 0000000..cdcf6c2
--- /dev/null
+++ b/onboarding-java/src/main/java/com/gdn/onboarding/java/onboardingjava/OnboardingJavaApplication.java
@@ -0,0 +1,13 @@
+package com.gdn.onboarding.java.onboardingjava;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class OnboardingJavaApplication {
+
+ public static void main(String[] args) {
+ SpringApplication.run(OnboardingJavaApplication.class, args);
+ }
+
+}
diff --git a/onboarding-java/src/main/java/com/gdn/onboarding/java/onboardingjava/calcApp/Calculator.java b/onboarding-java/src/main/java/com/gdn/onboarding/java/onboardingjava/calcApp/Calculator.java
new file mode 100644
index 0000000..bfd0780
--- /dev/null
+++ b/onboarding-java/src/main/java/com/gdn/onboarding/java/onboardingjava/calcApp/Calculator.java
@@ -0,0 +1,31 @@
+package com.gdn.onboarding.java.onboardingjava.calcApp;
+
+public class Calculator {
+ public Integer add(Integer a, Integer b) {
+ if (a == null || b == null) {
+ throw new IllegalArgumentException("Parameter cannot be null");
+ }
+ return a + b;
+ }
+
+ public Integer substract(Integer a, Integer b){
+ if (a == null || b == null) {
+ throw new IllegalArgumentException("Parameter cannot be null");
+ }
+ return a - b;
+ }
+
+ public Integer multiply(Integer a, Integer b){
+ if (a == null || b == null) {
+ throw new IllegalArgumentException("Parameter cannot be null");
+ }
+ return a * b;
+ }
+
+ public Integer divide(Integer a, Integer b){
+ if (a == null || b == null) {
+ throw new IllegalArgumentException("Parameter cannot be null");
+ }
+ return a / b;
+ }
+}
diff --git a/onboarding-java/src/main/java/com/gdn/onboarding/java/onboardingjava/collection/ListTest.java b/onboarding-java/src/main/java/com/gdn/onboarding/java/onboardingjava/collection/ListTest.java
new file mode 100644
index 0000000..155f656
--- /dev/null
+++ b/onboarding-java/src/main/java/com/gdn/onboarding/java/onboardingjava/collection/ListTest.java
@@ -0,0 +1,18 @@
+package com.gdn.onboarding.java.onboardingjava.collection;
+
+import java.util.List;
+import java.util.ArrayList;
+
+public class ListTest {
+ public static void main(String[] args) {
+ List list = new ArrayList<>();
+ list.add("String 1");
+ list.add("String 3");
+ list.add("String 2");
+ list.add(1, "String tambahan di index 1");
+
+ for (String str : list) {
+ System.out.println(str);
+ }
+ }
+}
diff --git a/onboarding-java/src/main/java/com/gdn/onboarding/java/onboardingjava/collection/MapTest.java b/onboarding-java/src/main/java/com/gdn/onboarding/java/onboardingjava/collection/MapTest.java
new file mode 100644
index 0000000..4d24a60
--- /dev/null
+++ b/onboarding-java/src/main/java/com/gdn/onboarding/java/onboardingjava/collection/MapTest.java
@@ -0,0 +1,17 @@
+package com.gdn.onboarding.java.onboardingjava.collection;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class MapTest {
+ public static void main(String[] args) {
+ Map mapStrings = new HashMap<>();
+ mapStrings.put("1", "Vincent Low");
+ mapStrings.put("2", "Bambang Jamet");
+ mapStrings.put("1", "Bambang Jamet");
+
+ for (Map.Entry entry : mapStrings.entrySet()) {
+ System.out.println(entry.getKey() + " " + entry.getValue());
+ }
+ }
+}
diff --git a/onboarding-java/src/main/java/com/gdn/onboarding/java/onboardingjava/collection/SetTest.java b/onboarding-java/src/main/java/com/gdn/onboarding/java/onboardingjava/collection/SetTest.java
new file mode 100644
index 0000000..a70d0ff
--- /dev/null
+++ b/onboarding-java/src/main/java/com/gdn/onboarding/java/onboardingjava/collection/SetTest.java
@@ -0,0 +1,82 @@
+package com.gdn.onboarding.java.onboardingjava.collection;
+
+import java.util.HashSet;
+import java.util.Set;
+
+public class SetTest {
+ public static void main(String[] args) {
+ Human human = new Human<>();
+ human.setId(100);
+ human.setName("Vincent Low");
+ human.setData("Ini data generic");
+
+// System.out.println(human.getData());
+ setHumans();
+ }
+
+ private static void setHumans() {
+ Set setHumans = new HashSet<>();
+
+ Human a = new Human();
+ a.setId(1);
+ a.setName("Vincent");
+ setHumans.add(a);
+
+ Human b = new Human();
+ b.setId(2);
+ b.setName("Wow");
+ setHumans.add(b);
+
+// for (Human human : setHumans) {
+// System.out.println(human.getId() + " " + human.getName());
+// }
+
+ setHumans.stream().forEach(h -> {
+ System.out.println(h.getId());
+ System.out.println(h.getName());
+ });
+ }
+
+ private static void setStrings() {
+ Set setStr = new HashSet<>();
+ setStr.add("String 01");
+ setStr.add("String 03");
+ setStr.add("String 04");
+ setStr.add("String 02");
+ setStr.add("String 04");
+
+ for (String str : setStr) {
+ System.out.println(str);
+ }
+ }
+
+ public static class Human {
+ private Integer id;
+ private String name;
+ private T data;
+
+ public Integer getId() {
+ return id;
+ }
+
+ public void setId(Integer id) {
+ this.id = id;
+ }
+
+ public String getName() {
+ return name;
+ }
+
+ public void setName(String name) {
+ this.name = name;
+ }
+
+ public T getData() {
+ return data;
+ }
+
+ public void setData(T data) {
+ this.data = data;
+ }
+ }
+}
diff --git a/onboarding-java/src/main/java/com/gdn/onboarding/java/onboardingjava/project/pseudocode/Pseudocode.java b/onboarding-java/src/main/java/com/gdn/onboarding/java/onboardingjava/project/pseudocode/Pseudocode.java
new file mode 100644
index 0000000..8642633
--- /dev/null
+++ b/onboarding-java/src/main/java/com/gdn/onboarding/java/onboardingjava/project/pseudocode/Pseudocode.java
@@ -0,0 +1,86 @@
+package com.gdn.onboarding.java.onboardingjava.project.pseudocode;
+
+public class Pseudocode {
+ public static void main(String[] args) {
+ new Pseudocode();
+ }
+
+ public Pseudocode(){
+// System.out.println(letterGrade(10));
+// System.out.println(calendar(12));
+// System.out.println(factorial(5));
+//
+// Integer[] arr = {1, 3, 5, 2, 7, 4};
+// arr = bubbleSort(arr);
+// for (int num: arr) System.out.print(num + " ");
+ }
+
+ private void validate(Integer value) {
+ if (value == null) throw new IllegalArgumentException("Parameter cannot be null");
+ }
+
+ private void validateArr(Integer[] arr) {
+ if (arr == null) throw new IllegalArgumentException("Array cannot be null");
+ }
+
+ public String letterGrade(Integer value) {
+ validate(value);
+ if (value > 90) return "A";
+ else if (value >= 80 && value < 90) return "B";
+ else if (value >= 70 && value < 80) return "C";
+ else if (value >= 60 && value < 70) return "D";
+ else return "E";
+ }
+
+ public String calendar(Integer monthNumber) {
+ validate(monthNumber);
+ switch (monthNumber) {
+ case 1:
+ return "Januari";
+ case 2:
+ return "Februari";
+ case 3:
+ return "Maret";
+ case 4:
+ return "April";
+ case 5:
+ return "Mei";
+ case 6:
+ return "Juni";
+ case 7:
+ return "Juli";
+ case 8:
+ return "Agustus";
+ case 9:
+ return "September";
+ case 10:
+ return "Oktober";
+ case 11:
+ return "November";
+ case 12:
+ return "Desember";
+ default: throw new IllegalArgumentException("Bulan harus di antara angka 1 - 12");
+ }
+ }
+
+ public Integer factorial(Integer n) {
+ validate(n);
+ if (n > 1) return n*factorial(n-1);
+ else if (n>=0) return 1;
+ else throw new IllegalArgumentException("Angka tidak boleh negatif [0-n]");
+ }
+
+ public Integer[] bubbleSort(Integer[] arr) {
+ validateArr(arr);
+ int n = arr.length;
+ for (int i = 0; i < n-1; i++){
+ for (int j = 0; j < n-i-1; j++)
+ if (arr[j] > arr[j+1]) {
+ int temp = arr[j];
+ arr[j] = arr[j+1];
+ arr[j+1] = temp;
+ }
+ }
+ return arr;
+ }
+}
diff --git a/onboarding-java/src/main/java/com/gdn/onboarding/java/onboardingjava/project/todoList/Todo.java b/onboarding-java/src/main/java/com/gdn/onboarding/java/onboardingjava/project/todoList/Todo.java
new file mode 100644
index 0000000..8d4d5b9
--- /dev/null
+++ b/onboarding-java/src/main/java/com/gdn/onboarding/java/onboardingjava/project/todoList/Todo.java
@@ -0,0 +1,17 @@
+package com.gdn.onboarding.java.onboardingjava.project.todoList;
+
+public class Todo {
+ private String body;
+
+ public Todo(String body) {
+ this.body = body;
+ }
+
+ public String getBody() {
+ return body;
+ }
+
+ public void setBody(String body) {
+ this.body = body;
+ }
+}
diff --git a/onboarding-java/src/main/java/com/gdn/onboarding/java/onboardingjava/project/todoList/TodoList.java b/onboarding-java/src/main/java/com/gdn/onboarding/java/onboardingjava/project/todoList/TodoList.java
new file mode 100644
index 0000000..e5eb524
--- /dev/null
+++ b/onboarding-java/src/main/java/com/gdn/onboarding/java/onboardingjava/project/todoList/TodoList.java
@@ -0,0 +1,102 @@
+package com.gdn.onboarding.java.onboardingjava.project.todoList;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Scanner;
+import java.util.concurrent.atomic.AtomicInteger;
+
+public class TodoList {
+ public Scanner scan = new Scanner(System.in);
+ private List todoList = new ArrayList<>();
+
+ public static void main(String[] args) {
+ new TodoList();
+ }
+
+ public TodoList() {
+// codeApp();
+ }
+
+ private void codeApp() {
+ int choose;
+ do {
+ menu();
+ choose = scan.nextInt();
+ scan.nextLine();
+
+ switch (choose) {
+ case 1:
+ System.out.print("Body: ");
+ String body = scan.nextLine();
+ addTodo(body);
+ break;
+ case 2:
+ printAllTodo();
+ if (!todoList.isEmpty()) {
+ System.out.print("Todo Number: ");
+ Integer index = scan.nextInt();
+ scan.nextLine();
+ removeTodo(index - 1);
+ }
+ break;
+ case 3:
+ printAllTodo();
+ break;
+ default:
+ System.out.println("Choose between 1-3");
+ }
+ System.out.println("\n");
+ } while (true);
+ }
+
+ private void menu() {
+ System.out.println("TODO LIST APP");
+ System.out.println("-------------");
+ System.out.println("1. Add Todo");
+ System.out.println("2. Remove Todo");
+ System.out.println("3. Print All Todo");
+ System.out.print(">> ");
+ }
+
+ private void validateString(String body) {
+ if (body == null) throw new IllegalArgumentException("Parameter cannot be null");
+ else if (body.length() == 0) throw new IllegalArgumentException("Body cannot be empty");
+ }
+
+ private void validateTodoIndex(Integer index) {
+ if (index == null || index < 0 || index > todoList.size() - 1)
+ throw new IllegalArgumentException("Index must be between 1-" + todoList.size());
+ }
+
+ public Boolean addTodo(String body) {
+ validateString(body);
+ Todo newTodo = new Todo(body);
+ todoList.add(newTodo);
+ return true;
+ }
+
+ public Boolean removeTodo(Integer index) {
+ validateTodoIndex(index);
+ todoList.remove(index.intValue());
+ return true;
+ }
+
+ public List getAllTodo() {
+ if (todoList.isEmpty()) {
+ return null;
+ }
+ return todoList;
+ }
+
+ public void printAllTodo() {
+ List todos = getAllTodo();
+ if (todos == null || todos.isEmpty()) {
+ System.out.println("Empty...");
+ return;
+ }
+ AtomicInteger index = new AtomicInteger(1);
+ todoList.stream().forEach(t -> {
+ System.out.println((index.getAndIncrement()) + ". " + t.getBody());
+ });
+ }
+}
diff --git a/onboarding-java/src/main/resources/application.properties b/onboarding-java/src/main/resources/application.properties
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/onboarding-java/src/main/resources/application.properties
@@ -0,0 +1 @@
+
diff --git a/onboarding-java/src/test/java/com/gdn/onboarding/java/onboardingjava/OnboardingJavaApplicationTests.java b/onboarding-java/src/test/java/com/gdn/onboarding/java/onboardingjava/OnboardingJavaApplicationTests.java
new file mode 100644
index 0000000..81da910
--- /dev/null
+++ b/onboarding-java/src/test/java/com/gdn/onboarding/java/onboardingjava/OnboardingJavaApplicationTests.java
@@ -0,0 +1,13 @@
+package com.gdn.onboarding.java.onboardingjava;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class OnboardingJavaApplicationTests {
+
+ @Test
+ void contextLoads() {
+ }
+
+}
diff --git a/onboarding-java/src/test/java/com/gdn/onboarding/java/onboardingjava/calcApp/calculatorTest.java b/onboarding-java/src/test/java/com/gdn/onboarding/java/onboardingjava/calcApp/calculatorTest.java
new file mode 100644
index 0000000..fc790d3
--- /dev/null
+++ b/onboarding-java/src/test/java/com/gdn/onboarding/java/onboardingjava/calcApp/calculatorTest.java
@@ -0,0 +1,73 @@
+package com.gdn.onboarding.java.onboardingjava.calcApp;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+import org.springframework.test.util.AssertionErrors;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class calculatorTest {
+ @Test
+ public void testAdd_success() {
+ Calculator calculator = new Calculator();
+ Integer result = calculator.add(10, 5);
+ Assertions.assertEquals(15, result);
+ }
+
+ @Test
+ public void testAdd_failed() {
+ Assertions.assertThrows(IllegalArgumentException.class, () -> {
+ Calculator calculator = new Calculator();
+ Integer result = calculator.add(null, 5);
+ Assertions.assertEquals(15, result);
+ });
+ }
+
+ @Test
+ public void testSubstract_success() {
+ Calculator calculator = new Calculator();
+ Integer result = calculator.substract(10, 5);
+ Assertions.assertEquals(5, result);
+ }
+
+ @Test
+ public void testSubstract_failed() {
+ Assertions.assertThrows(IllegalArgumentException.class, () -> {
+ Calculator calculator = new Calculator();
+ Integer result = calculator.substract(null, 5);
+ Assertions.assertEquals(5, result);
+ });
+ }
+
+ @Test
+ public void testMultiply_success() {
+ Calculator calculator = new Calculator();
+ Integer result = calculator.multiply(5, 5);
+ Assertions.assertEquals(25, result);
+ }
+
+ @Test
+ public void testMultiply_failed() {
+ Assertions.assertThrows(IllegalArgumentException.class, () -> {
+ Calculator calculator = new Calculator();
+ Integer result = calculator.multiply(null, 5);
+ Assertions.assertEquals(25, result);
+ });
+ }
+
+ @Test
+ public void testDivide_success() {
+ Calculator calculator = new Calculator();
+ Integer result = calculator.divide(10, 5);
+ Assertions.assertEquals(2, result);
+ }
+
+ @Test
+ public void testDivide_failed() {
+ Assertions.assertThrows(IllegalArgumentException.class, () -> {
+ Calculator calculator = new Calculator();
+ Integer result = calculator.divide(null, 5);
+ Assertions.assertEquals(2, result);
+ });
+ }
+}
\ No newline at end of file
diff --git a/onboarding-java/src/test/java/com/gdn/onboarding/java/onboardingjava/project/pseudocode/PseudocodeTest.java b/onboarding-java/src/test/java/com/gdn/onboarding/java/onboardingjava/project/pseudocode/PseudocodeTest.java
new file mode 100644
index 0000000..fbd42ea
--- /dev/null
+++ b/onboarding-java/src/test/java/com/gdn/onboarding/java/onboardingjava/project/pseudocode/PseudocodeTest.java
@@ -0,0 +1,67 @@
+package com.gdn.onboarding.java.onboardingjava.project.pseudocode;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+public class PseudocodeTest {
+ public static final Pseudocode code = new Pseudocode();
+
+ @Test
+ public void letterGrade_success() {
+ String result = code.letterGrade(101);
+ Assertions.assertEquals("A", result);
+ }
+
+ @Test
+ public void letterGrade_failed() {
+ Assertions.assertThrows(IllegalArgumentException.class, ()->{
+ String result = code.letterGrade(null);
+ Assertions.assertEquals("A", result);
+ });
+ }
+
+ @Test
+ public void calendar_success() {
+ String result = code.calendar(2);
+ Assertions.assertEquals("Februari", result);
+ }
+
+ @Test
+ public void calendar_failed() {
+ Assertions.assertThrows(IllegalArgumentException.class, ()->{
+ String result = code.calendar(null);
+ Assertions.assertEquals("Februari", result);
+ });
+ }
+
+ @Test
+ public void factorial_success() {
+ Integer result = code.factorial(5);
+ Assertions.assertEquals(120, result);
+ }
+
+ @Test
+ public void factorial_failed() {
+ Assertions.assertThrows(IllegalArgumentException.class, ()->{
+ Integer result = code.factorial(null);
+ Assertions.assertEquals(120, result);
+ });
+ }
+
+ @Test
+ public void bubbleSort_success() {
+ Integer[] unsortedArr = {5, 2, 4, 3, 1};
+ Integer[] expectedResult = {1, 2, 3, 4, 5};
+ Integer[] result = code.bubbleSort(unsortedArr);
+ Assertions.assertArrayEquals(expectedResult, result);
+ }
+
+ @Test
+ public void bubbleSort_failed() {
+ Assertions.assertThrows(IllegalArgumentException.class, ()->{
+ Integer[] expectedResult = {1, 2, 3, 4, 5};
+ Integer[] result = code.bubbleSort(null);
+ Assertions.assertArrayEquals(expectedResult, result);
+ });
+ }
+}
diff --git a/onboarding-java/src/test/java/com/gdn/onboarding/java/onboardingjava/project/todoList/TodoListTest.java b/onboarding-java/src/test/java/com/gdn/onboarding/java/onboardingjava/project/todoList/TodoListTest.java
new file mode 100644
index 0000000..261cc6b
--- /dev/null
+++ b/onboarding-java/src/test/java/com/gdn/onboarding/java/onboardingjava/project/todoList/TodoListTest.java
@@ -0,0 +1,74 @@
+package com.gdn.onboarding.java.onboardingjava.project.todoList;
+
+import org.junit.jupiter.api.*;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class TodoListTest {
+ private TodoList todo;
+ private List result;
+
+ @BeforeEach()
+ public void init() {
+ todo = new TodoList();
+ result = new ArrayList<>();
+ }
+
+ @Test
+ public void getTodo_nullResult_success() {
+ result = todo.getAllTodo();
+ Assertions.assertEquals(null, result);
+ }
+
+ @Test
+ public void getTodo_success() {
+ todo.addTodo("Nimbun Minyak 2L");
+ result = todo.getAllTodo();
+ Assertions.assertEquals(1, result.size());
+ }
+
+ @Test
+ public void addTodo_emptyStringParam_failed() {
+ Assertions.assertThrows(IllegalArgumentException.class, ()->{
+ todo.addTodo("");
+ });
+ }
+
+ @Test
+ public void addTodo_nullParam_failed() {
+ Assertions.assertThrows(IllegalArgumentException.class, ()->{
+ todo.addTodo(null);
+ });
+ }
+
+ @Test
+ public void addTodo_success() {
+ Boolean result = todo.addTodo("Nimbun Minyak 1L");
+ Assertions.assertEquals(true, result);
+ }
+
+ @Test
+ public void removeTodo_IDNotFound_failed() {
+ Assertions.assertThrows(IllegalArgumentException.class, ()->{
+ // should mock where id not found
+ Integer notFoundID = 10;
+ todo.removeTodo(notFoundID);
+ });
+ }
+
+ @Test
+ public void removeTodo_nullParam_failed() {
+ Assertions.assertThrows(IllegalArgumentException.class, ()->{
+ todo.removeTodo(null);
+ });
+ }
+
+ @Test
+ public void removeTodo_success() {
+ todo.addTodo("Nimbun Minyak 1L");
+ todo.addTodo("Nimbun Minyak 2L");
+ Boolean result = todo.removeTodo(0);
+ Assertions.assertEquals(true, result);
+ }
+}