diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..097f9f9
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,9 @@
+#
+# https://help.github.com/articles/dealing-with-line-endings/
+#
+# Linux start script should use lf
+/gradlew text eol=lf
+
+# These are Windows script files and should use crlf
+*.bat text eol=crlf
+
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..1b6985c
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,5 @@
+# Ignore Gradle project-specific cache directory
+.gradle
+
+# Ignore Gradle build output directory
+build
diff --git a/.idea/.gitignore b/.idea/.gitignore
new file mode 100644
index 0000000..26d3352
--- /dev/null
+++ b/.idea/.gitignore
@@ -0,0 +1,3 @@
+# Default ignored files
+/shelf/
+/workspace.xml
diff --git a/.idea/compiler.xml b/.idea/compiler.xml
new file mode 100644
index 0000000..fb7f4a8
--- /dev/null
+++ b/.idea/compiler.xml
@@ -0,0 +1,6 @@
+
+
+
+
+
+
\ No newline at end of file
diff --git a/.idea/gradle.xml b/.idea/gradle.xml
new file mode 100644
index 0000000..0596ea7
--- /dev/null
+++ b/.idea/gradle.xml
@@ -0,0 +1,18 @@
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/.idea/misc.xml b/.idea/misc.xml
new file mode 100644
index 0000000..62269df
--- /dev/null
+++ b/.idea/misc.xml
@@ -0,0 +1,7 @@
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 0000000..6d70408
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,4 @@
+{
+ "java.compile.nullAnalysis.mode": "automatic",
+ "jdk.java.onSave.organizeImports": true
+}
\ No newline at end of file
diff --git a/Module2/15UnionFind.pdf b/Module2/15UnionFind.pdf
new file mode 100644
index 0000000..3f11887
Binary files /dev/null and b/Module2/15UnionFind.pdf differ
diff --git a/Module3/14AnalysisOfAlgorithms.pdf b/Module3/14AnalysisOfAlgorithms.pdf
new file mode 100644
index 0000000..bd0462d
Binary files /dev/null and b/Module3/14AnalysisOfAlgorithms.pdf differ
diff --git a/Module4/13StacksAndQueues.pdf b/Module4/13StacksAndQueues.pdf
new file mode 100644
index 0000000..11dec77
Binary files /dev/null and b/Module4/13StacksAndQueues.pdf differ
diff --git a/Module5/21ElementarySorts.pdf b/Module5/21ElementarySorts.pdf
new file mode 100644
index 0000000..c818f3f
Binary files /dev/null and b/Module5/21ElementarySorts.pdf differ
diff --git a/Module6/22Mergesort.pdf b/Module6/22Mergesort.pdf
new file mode 100644
index 0000000..f1961d1
Binary files /dev/null and b/Module6/22Mergesort.pdf differ
diff --git a/Module7/23Quicksort.pdf b/Module7/23Quicksort.pdf
new file mode 100644
index 0000000..0cd43c5
Binary files /dev/null and b/Module7/23Quicksort.pdf differ
diff --git a/Module8/24PriorityQueues.pdf b/Module8/24PriorityQueues.pdf
new file mode 100644
index 0000000..681d06b
Binary files /dev/null and b/Module8/24PriorityQueues.pdf differ
diff --git a/Module9/31ElementarySymbolTables.pdf b/Module9/31ElementarySymbolTables.pdf
new file mode 100644
index 0000000..2591dce
Binary files /dev/null and b/Module9/31ElementarySymbolTables.pdf differ
diff --git a/Module9/32BinarySearchTrees.pdf b/Module9/32BinarySearchTrees.pdf
new file mode 100644
index 0000000..ce02d43
Binary files /dev/null and b/Module9/32BinarySearchTrees.pdf differ
diff --git a/Roadmaps/datastructures.md b/Roadmaps/datastructures.md
new file mode 100644
index 0000000..e0513b9
--- /dev/null
+++ b/Roadmaps/datastructures.md
@@ -0,0 +1,10 @@
+#Data Structures
+
+ 1. Stacks:
+ - Linear data structure
+ - Can have various implementations
+ - Should support (LIFO)
+ - Primitive implementation (Using arrays of primitive data types)
+ - Other implementations (Using linked lists)
+ 2. Queues:
+
\ No newline at end of file
diff --git a/Roadmaps/readme.md b/Roadmaps/readme.md
new file mode 100644
index 0000000..9b8f3be
--- /dev/null
+++ b/Roadmaps/readme.md
@@ -0,0 +1,6 @@
+# The road maps folder provides different view to important concepts, implemented using JAVA, they are
+
+## 1. Data Structure
+## 2. Algorithms
+## 3.Collections
+## 4. Problem Solving patterns
\ No newline at end of file
diff --git a/clients/build.gradle b/clients/build.gradle
new file mode 100644
index 0000000..c9a970c
--- /dev/null
+++ b/clients/build.gradle
@@ -0,0 +1,20 @@
+plugins {
+ id 'java'
+}
+
+group = 'com.hithomelabs'
+version = 'unspecified'
+
+repositories {
+ mavenCentral()
+}
+
+dependencies {
+ testImplementation platform('org.junit:junit-bom:5.10.0')
+ testImplementation 'org.junit.jupiter:junit-jupiter'
+ implementation project(':module4')
+}
+
+test {
+ useJUnitPlatform()
+}
\ No newline at end of file
diff --git a/clients/src/main/java/com/hithomelabs/clients/Main.java b/clients/src/main/java/com/hithomelabs/clients/Main.java
new file mode 100644
index 0000000..d8c5d68
--- /dev/null
+++ b/clients/src/main/java/com/hithomelabs/clients/Main.java
@@ -0,0 +1,23 @@
+package com.hithomelabs.clients;
+
+
+import com.hithomelabs.princeton1.module4.LinkedStack;
+import com.hithomelabs.princeton1.module4.Stack;
+
+public class Main {
+ public static void main(String[] args) {
+ Stack stack = new LinkedStack();
+ stack.push("hello");
+ stack.push("world");
+ stack.push("I");
+ stack.push("am");
+ stack.push("using");
+ stack.push("stacks");
+ // Using object s, as stack is generic but every java Object has implementation of toString()
+ for (Object s : stack)
+ System.out.println(s);
+ while(!stack.isEmpty()){
+ System.out.println(stack.pop());
+ }
+ }
+}
\ No newline at end of file
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
new file mode 100644
index 0000000..d7672dc
--- /dev/null
+++ b/gradle/libs.versions.toml
@@ -0,0 +1,10 @@
+# This file was generated by the Gradle 'init' task.
+# https://docs.gradle.org/current/userguide/platforms.html#sub::toml-dependencies-format
+
+[versions]
+guava = "33.0.0-jre"
+junit-jupiter = "5.10.2"
+
+[libraries]
+guava = { module = "com.google.guava:guava", version.ref = "guava" }
+junit-jupiter = { module = "org.junit.jupiter:junit-jupiter", version.ref = "junit-jupiter" }
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..e644113
Binary files /dev/null and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..a441313
--- /dev/null
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.8-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/gradlew b/gradlew
new file mode 100755
index 0000000..b740cf1
--- /dev/null
+++ b/gradlew
@@ -0,0 +1,249 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original 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 POSIX generated by Gradle.
+#
+# Important for running:
+#
+# (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+# noncompliant, but you have some other compliant shell such as ksh or
+# bash, then to run this script, type that shell name before the whole
+# command line, like:
+#
+# ksh Gradle
+#
+# Busybox and similar reduced shells will NOT work, because this script
+# requires all of these POSIX shell features:
+# * functions;
+# * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+# «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+# * compound commands having a testable exit status, especially «case»;
+# * various built-in commands including «command», «set», and «ulimit».
+#
+# Important for patching:
+#
+# (2) This script targets any POSIX shell, so it avoids extensions provided
+# by Bash, Ksh, etc; in particular arrays are avoided.
+#
+# The "traditional" practice of packing multiple parameters into a
+# space-separated string is a well documented source of bugs and security
+# problems, so this is (mostly) avoided, by progressively accumulating
+# options in "$@", and eventually passing that to Java.
+#
+# Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+# and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+# see the in-line comments for details.
+#
+# There are tweaks for specific operating systems such as AIX, CygWin,
+# Darwin, MinGW, and NonStop.
+#
+# (3) This script is generated from the Groovy template
+# https://github.com/gradle/gradle/blob/HEAD/platforms/jvm/plugins-application/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+# within the Gradle project.
+#
+# You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+ APP_HOME=${app_path%"${app_path##*/}"} # leaves a trailing /; empty if no leading path
+ [ -h "$app_path" ]
+do
+ ls=$( ls -ld "$app_path" )
+ link=${ls#*' -> '}
+ case $link in #(
+ /*) app_path=$link ;; #(
+ *) app_path=$APP_HOME$link ;;
+ esac
+done
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd "${APP_HOME:-./}" > /dev/null && pwd -P ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+ echo "$*"
+} >&2
+
+die () {
+ echo
+ echo "$*"
+ echo
+ exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in #(
+ CYGWIN* ) cygwin=true ;; #(
+ Darwin* ) darwin=true ;; #(
+ MSYS* | 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: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+ fi
+else
+ JAVACMD=java
+ if ! command -v java >/dev/null 2>&1
+ then
+ die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+ fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+ case $MAX_FD in #(
+ max*)
+ # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+ # shellcheck disable=SC2039,SC3045
+ MAX_FD=$( ulimit -H -n ) ||
+ warn "Could not query maximum file descriptor limit"
+ esac
+ case $MAX_FD in #(
+ '' | soft) :;; #(
+ *)
+ # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+ # shellcheck disable=SC2039,SC3045
+ ulimit -n "$MAX_FD" ||
+ warn "Could not set maximum file descriptor limit to $MAX_FD"
+ esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+# * args from the command line
+# * the main class name
+# * -classpath
+# * -D...appname settings
+# * --module-path (only if needed)
+# * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+ APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+ CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+ JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+ # Now convert the arguments - kludge to limit ourselves to /bin/sh
+ for arg do
+ if
+ case $arg in #(
+ -*) false ;; # don't mess with options #(
+ /?*) t=${arg#/} t=/${t%%/*} # looks like a POSIX filepath
+ [ -e "$t" ] ;; #(
+ *) false ;;
+ esac
+ then
+ arg=$( cygpath --path --ignore --mixed "$arg" )
+ fi
+ # Roll the args list around exactly as many times as the number of
+ # args, so each arg winds up back in the position where it started, but
+ # possibly modified.
+ #
+ # NB: a `for` loop captures its iteration list before it begins, so
+ # changing the positional parameters here affects neither the number of
+ # iterations, nor the values presented in `arg`.
+ shift # remove old arg
+ set -- "$@" "$arg" # push replacement arg
+ done
+fi
+
+
+# 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"'
+
+# Collect all arguments for the java command:
+# * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+# and any embedded shellness will be escaped.
+# * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+# treated as '${Hostname}' itself on the command line.
+
+set -- \
+ "-Dorg.gradle.appname=$APP_BASE_NAME" \
+ -classpath "$CLASSPATH" \
+ org.gradle.wrapper.GradleWrapperMain \
+ "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+ die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+# readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+# set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+ printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+ xargs -n1 |
+ sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+ tr '\n' ' '
+ )" '"$@"'
+
+exec "$JAVACMD" "$@"
diff --git a/gradlew.bat b/gradlew.bat
new file mode 100644
index 0000000..25da30d
--- /dev/null
+++ b/gradlew.bat
@@ -0,0 +1,92 @@
+@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=.
+@rem This is normally unused
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@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% equ 0 goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+: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 %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 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!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/module4/build.gradle b/module4/build.gradle
new file mode 100644
index 0000000..f600b29
--- /dev/null
+++ b/module4/build.gradle
@@ -0,0 +1,38 @@
+/*
+ * This file was generated by the Gradle 'init' task.
+ *
+ * This generated file contains a sample Java application project to get you started.
+ * For more details on building Java & JVM projects, please refer to https://docs.gradle.org/8.8/userguide/building_java_projects.html in the Gradle documentation.
+ */
+
+plugins {
+ // Apply the application plugin to add support for building a CLI application in Java.
+ id 'java'
+}
+
+repositories {
+ // Use Maven Central for resolving dependencies.
+ mavenCentral()
+}
+
+dependencies {
+ // Use JUnit Jupiter for testing.
+ testImplementation libs.junit.jupiter
+
+ testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
+
+ // This dependency is used by the application.
+ implementation libs.guava
+}
+
+// Apply a specific Java toolchain to ease working on different environments.
+java {
+ toolchain {
+ languageVersion = JavaLanguageVersion.of(11)
+ }
+}
+
+tasks.named('test') {
+ // Use JUnit Platform for unit tests.
+ useJUnitPlatform()
+}
diff --git a/module4/src/main/java/com/hithomelabs/princeton1/module4/Client.java b/module4/src/main/java/com/hithomelabs/princeton1/module4/Client.java
new file mode 100644
index 0000000..2f651f2
--- /dev/null
+++ b/module4/src/main/java/com/hithomelabs/princeton1/module4/Client.java
@@ -0,0 +1,14 @@
+/*
+ * This source file was generated by the Gradle 'init' task
+ */
+package com.hithomelabs.princeton1.module4;
+
+public class Client {
+ public String getGreeting() {
+ return "Hello World!";
+ }
+
+ public static void main(String[] args) {
+ System.out.println(new Client().getGreeting());
+ }
+}
diff --git a/module4/src/main/java/com/hithomelabs/princeton1/module4/LinkedStack.java b/module4/src/main/java/com/hithomelabs/princeton1/module4/LinkedStack.java
new file mode 100644
index 0000000..6c7c398
--- /dev/null
+++ b/module4/src/main/java/com/hithomelabs/princeton1/module4/LinkedStack.java
@@ -0,0 +1,72 @@
+package com.hithomelabs.princeton1.module4;
+import java.util.Iterator;
+
+// Creating a concrete linked Implementation of Stack
+public class LinkedStack extends Stack{
+
+ // No need for an explicit constructor as size will be initialized to 0 and root to null
+ private int size;
+ private Node first;
+
+ // By default instance variables are package private
+ private class Node{
+ E value;
+ Node next;
+ }
+
+ // Will return true if size is 0
+ @Override
+ public boolean isEmpty() {
+ return (this.size == 0);
+ }
+
+ // Adds an element to the start of a linked list
+ @Override
+ public void push(E element) {
+ Node newNode = new Node();
+ newNode.value = element;
+ newNode.next = first;
+ first = newNode;
+ this.size = this.size + 1;
+ }
+
+ @Override
+ public E pop() {
+ if (this.isEmpty())
+ return null;
+ else{
+ Node toBePopped = first;
+ first = first.next;
+ this.size = this.size - 1;
+ return toBePopped.value;
+ }
+ }
+
+ @Override
+ public int size() {
+ return this.size;
+ }
+
+ @Override
+ public Iterator iterator() {
+ return new Iterator() {
+
+ // Internal classes can access outer objects
+ Node current = first;
+ @Override
+ public boolean hasNext() {
+ return current != null;
+ }
+
+ @Override
+ public E next() {
+ E element = current.value;
+ current = current.next;
+ return element;
+ }
+ };
+ }
+
+
+
+}
diff --git a/module4/src/main/java/com/hithomelabs/princeton1/module4/Stack.java b/module4/src/main/java/com/hithomelabs/princeton1/module4/Stack.java
new file mode 100644
index 0000000..4cba4ea
--- /dev/null
+++ b/module4/src/main/java/com/hithomelabs/princeton1/module4/Stack.java
@@ -0,0 +1,10 @@
+package com.hithomelabs.princeton1.module4;
+import java.lang.Iterable;
+
+public abstract class Stack implements Iterable{
+
+ public abstract boolean isEmpty();
+ public abstract void push(E element);
+ public abstract E pop();
+ public abstract int size();
+}
\ No newline at end of file
diff --git a/module4/src/test/java/com/hithomelabs/princeton1/module4/AppTest.java b/module4/src/test/java/com/hithomelabs/princeton1/module4/AppTest.java
new file mode 100644
index 0000000..3a8d330
--- /dev/null
+++ b/module4/src/test/java/com/hithomelabs/princeton1/module4/AppTest.java
@@ -0,0 +1,14 @@
+/*
+ * This source file was generated by the Gradle 'init' task
+ */
+package com.hithomelabs.princeton1.module4;
+
+import org.junit.jupiter.api.Test;
+import static org.junit.jupiter.api.Assertions.*;
+
+class AppTest {
+ @Test void appHasAGreeting() {
+ Client classUnderTest = new Client();
+ assertNotNull(classUnderTest.getGreeting(), "app should have a greeting");
+ }
+}
diff --git a/settings.gradle b/settings.gradle
new file mode 100644
index 0000000..cf1c802
--- /dev/null
+++ b/settings.gradle
@@ -0,0 +1,16 @@
+/*
+ * This file was generated by the Gradle 'init' task.
+ *
+ * The settings file is used to specify which projects to include in your build.
+ * For more detailed information on multi-project builds, please refer to https://docs.gradle.org/8.8/userguide/multi_project_builds.html in the Gradle documentation.
+ */
+
+plugins {
+ // Apply the foojay-resolver plugin to allow automatic download of JDKs
+ id 'org.gradle.toolchains.foojay-resolver-convention' version '0.8.0'
+}
+
+rootProject.name = 'Pricenton1'
+include('module4')
+include 'clients'
+