From 03c3ff7de781b8b9ee1c84ec5999f6d8cd635e2e Mon Sep 17 00:00:00 2001
From: ArmeetJatyani <armeetjatyani@gmail.com>
Date: Mon, 15 Mar 2021 10:55:15 -0700
Subject: [PATCH 01/31] added HelloWorld Example and Solution!

---
 .gitignore                                    |  5 ++++-
 .../chapter1/practice/HelloWorld.java         | 19 +++++++++++++++++++
 .../chapter1/solutions/HelloWorld.java        | 19 +++++++++++++++++++
 3 files changed, 42 insertions(+), 1 deletion(-)
 create mode 100644 src/com/codefortomorrow/beginner/chapter1/practice/HelloWorld.java
 create mode 100644 src/com/codefortomorrow/beginner/chapter1/solutions/HelloWorld.java

diff --git a/.gitignore b/.gitignore
index 1dbb98b..9a0f431 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,4 +3,7 @@
 
 # ignore files
 c4t-java.iml
-.DS_Store
\ No newline at end of file
+.DS_Store
+
+# ignore prettier files
+.prettierrc.json
diff --git a/src/com/codefortomorrow/beginner/chapter1/practice/HelloWorld.java b/src/com/codefortomorrow/beginner/chapter1/practice/HelloWorld.java
new file mode 100644
index 0000000..e2a15fe
--- /dev/null
+++ b/src/com/codefortomorrow/beginner/chapter1/practice/HelloWorld.java
@@ -0,0 +1,19 @@
+package com.codefortomorrow.beginner.chapter1.practice;
+
+/**
+ * @author ArmeetJatyani
+ * March 2021
+ * 
+ * Welcome to Java! 
+ * This may be your first ever java program!
+ * We'll begin your journey with the infamous Hello World program!
+ */
+
+ // a class is an "object" where we will place all our code inside
+ public class HelloWorld{
+    // the main method (below) is the first thing that runs when your program is run
+    public static void main(String[] args) {
+        // write code here (replace the "" with "Hello World!")
+        System.out.println("");
+    }
+ }
\ No newline at end of file
diff --git a/src/com/codefortomorrow/beginner/chapter1/solutions/HelloWorld.java b/src/com/codefortomorrow/beginner/chapter1/solutions/HelloWorld.java
new file mode 100644
index 0000000..dbce821
--- /dev/null
+++ b/src/com/codefortomorrow/beginner/chapter1/solutions/HelloWorld.java
@@ -0,0 +1,19 @@
+package com.codefortomorrow.beginner.chapter1.practice;
+
+/**
+ * @author ArmeetJatyani
+ * March 2021
+ * 
+ * Welcome to Java! 
+ * This may be your first ever java program!
+ * We'll begin your journey with the infamous Hello World program!
+ */
+
+ // a class is an "object" where we will place all our code inside
+ public class HelloWorld{
+    // the main method (below) is the first thing that runs when your program is run
+    public static void main(String[] args) {
+        // write code here (replace the "" with "Hello World!")
+        System.out.println("Hello World!");
+    }
+ }
\ No newline at end of file

From 2a4843736205c3022ad45feae1b0910a932ad501 Mon Sep 17 00:00:00 2001
From: ArmeetJatyani <armeetjatyani@gmail.com>
Date: Mon, 15 Mar 2021 11:03:08 -0700
Subject: [PATCH 02/31] Added Comments exercise to practice comments (Java
 Beginners, Chapter 1)

---
 .../beginner/chapter1/practice/Comments.java  | 38 +++++++++++++++++++
 .../beginner/chapter1/solutions/Comments.java | 38 +++++++++++++++++++
 2 files changed, 76 insertions(+)
 create mode 100644 src/com/codefortomorrow/beginner/chapter1/practice/Comments.java
 create mode 100644 src/com/codefortomorrow/beginner/chapter1/solutions/Comments.java

diff --git a/src/com/codefortomorrow/beginner/chapter1/practice/Comments.java b/src/com/codefortomorrow/beginner/chapter1/practice/Comments.java
new file mode 100644
index 0000000..cebb705
--- /dev/null
+++ b/src/com/codefortomorrow/beginner/chapter1/practice/Comments.java
@@ -0,0 +1,38 @@
+package com.codefortomorrow.beginner.chapter1.practice;
+
+/**
+ * @author ArmeetJatyani
+ * March 2021
+ * 
+ * You'll be writing your first ever comment today! 
+ * What we'll go over: 
+ * - single line comments
+ * - multi line comments
+ */
+
+ // a class is an "object" where we will place all our code inside
+ public class Comments {
+     // the main method (below) is the first thing that runs when your program is run
+    public static void main(String[] args) {
+        // this is a single line comment, I can write anything here
+        // single line comments aren't run by Java!
+        // they can be used to annotate your code!
+
+        /**
+         * this is a multi
+         * line
+         * comment
+         * 
+         * It can span across multiple lines!
+         */
+
+        // YOUR ASSIGNMENT: write 1 single-line comment and 1 multi-line comment on the lines below...
+
+
+
+
+
+
+
+    }
+ }
\ No newline at end of file
diff --git a/src/com/codefortomorrow/beginner/chapter1/solutions/Comments.java b/src/com/codefortomorrow/beginner/chapter1/solutions/Comments.java
new file mode 100644
index 0000000..a14a123
--- /dev/null
+++ b/src/com/codefortomorrow/beginner/chapter1/solutions/Comments.java
@@ -0,0 +1,38 @@
+package com.codefortomorrow.beginner.chapter1.practice;
+
+/**
+ * @author ArmeetJatyani
+ * March 2021
+ * 
+ * You'll be writing your first ever comment today! 
+ * What we'll go over: 
+ * - single line comments
+ * - multi line comments
+ */
+
+ // a class is an "object" where we will place all our code inside
+ public class Comments {
+     // the main method (below) is the first thing that runs when your program is run
+    public static void main(String[] args) {
+        // this is a single line comment, I can write anything here
+        // single line comments aren't run by Java!
+        // they can be used to annotate your code!
+
+        /**
+         * this is a multi
+         * line
+         * comment
+         * 
+         * It can span across multiple lines!
+         */
+
+        // YOUR ASSIGNMENT: write 1 single-line comment and 1 multi-line comment on the lines below...
+
+        // Hi my name is Armeet!
+
+        /**
+         * I like teaching Java, and 
+         * good luck on your journey!
+         */
+    }
+ }
\ No newline at end of file

From bb68ef08cfdb2d99dba88794b254f703e2a55b8f Mon Sep 17 00:00:00 2001
From: ArmeetJatyani <armeetjatyani@gmail.com>
Date: Mon, 15 Mar 2021 11:47:45 -0700
Subject: [PATCH 03/31] finished VariableTypes exercise and solution

---
 .../chapter2/practice/VariableTypes.java      | 34 +++++++++++++++++++
 .../chapter2/solutions/VariableTypes.java     | 34 +++++++++++++++++++
 2 files changed, 68 insertions(+)
 create mode 100644 src/com/codefortomorrow/beginner/chapter2/practice/VariableTypes.java
 create mode 100644 src/com/codefortomorrow/beginner/chapter2/solutions/VariableTypes.java

diff --git a/src/com/codefortomorrow/beginner/chapter2/practice/VariableTypes.java b/src/com/codefortomorrow/beginner/chapter2/practice/VariableTypes.java
new file mode 100644
index 0000000..3cb0ed4
--- /dev/null
+++ b/src/com/codefortomorrow/beginner/chapter2/practice/VariableTypes.java
@@ -0,0 +1,34 @@
+package com.codefortomorrow.beginner.chapter1.practice;
+
+/**
+ * @author ArmeetJatyani
+ * March 2021
+ * 
+ * Define different types of variables
+ */
+
+ public class VariableTypes {
+    public static void main(String[] args) {
+        // write your code here
+        
+        // define an integer variable on line 15
+
+        
+        // define a float variable on line 18
+
+        
+        // define a double variable on line 21
+
+
+        // define a boolean variable on line 24 (Hint: true/false) on line 24
+
+
+        // define a character variable on line 27
+
+
+        // define a string variable on line 30 
+
+
+    }
+ }
+   
\ No newline at end of file
diff --git a/src/com/codefortomorrow/beginner/chapter2/solutions/VariableTypes.java b/src/com/codefortomorrow/beginner/chapter2/solutions/VariableTypes.java
new file mode 100644
index 0000000..36a6b48
--- /dev/null
+++ b/src/com/codefortomorrow/beginner/chapter2/solutions/VariableTypes.java
@@ -0,0 +1,34 @@
+package com.codefortomorrow.beginner.chapter1.practice;
+
+/**
+ * @author ArmeetJatyani
+ * March 2021
+ * 
+ * Define different types of variables
+ */
+
+ public class VariableTypes {
+    public static void main(String[] args) {
+        // write your code here
+        
+        // define an integer variable on line 15
+        int age = 23;
+        
+        // define a float variable on line 18
+        float pi = 3.14f;
+        
+        // define a double variable on line 21
+        double decimal = 23.2352536d;
+
+        // define a boolean variable on line 24 (Hint: true/false) on line 24
+        double dogsOut = true;  // the dogs are out :)
+
+        // define a character variable on line 27
+        char letter = 'A';
+
+        // define a string variable on line 30 
+        char name = "Jeff";
+        
+    }
+ }
+   
\ No newline at end of file

From a2a2eb84a3cd26b9502a8fc9f2420f0667b21f24 Mon Sep 17 00:00:00 2001
From: ArmeetJatyani <armeetjatyani@gmail.com>
Date: Mon, 15 Mar 2021 11:48:10 -0700
Subject: [PATCH 04/31] fixed VariableTypes package names

---
 .../beginner/chapter2/practice/VariableTypes.java               | 2 +-
 .../beginner/chapter2/solutions/VariableTypes.java              | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/com/codefortomorrow/beginner/chapter2/practice/VariableTypes.java b/src/com/codefortomorrow/beginner/chapter2/practice/VariableTypes.java
index 3cb0ed4..a051136 100644
--- a/src/com/codefortomorrow/beginner/chapter2/practice/VariableTypes.java
+++ b/src/com/codefortomorrow/beginner/chapter2/practice/VariableTypes.java
@@ -1,4 +1,4 @@
-package com.codefortomorrow.beginner.chapter1.practice;
+package com.codefortomorrow.beginner.chapter2.practice;
 
 /**
  * @author ArmeetJatyani
diff --git a/src/com/codefortomorrow/beginner/chapter2/solutions/VariableTypes.java b/src/com/codefortomorrow/beginner/chapter2/solutions/VariableTypes.java
index 36a6b48..f58142b 100644
--- a/src/com/codefortomorrow/beginner/chapter2/solutions/VariableTypes.java
+++ b/src/com/codefortomorrow/beginner/chapter2/solutions/VariableTypes.java
@@ -1,4 +1,4 @@
-package com.codefortomorrow.beginner.chapter1.practice;
+package com.codefortomorrow.beginner.chapter2.practice;
 
 /**
  * @author ArmeetJatyani

From b9f1238a4ddced74abe2b69d56b56ec4f9a84dca Mon Sep 17 00:00:00 2001
From: ArmeetJatyani <armeetjatyani@gmail.com>
Date: Mon, 15 Mar 2021 11:53:40 -0700
Subject: [PATCH 05/31] ApplesOranges exercise complete

---
 .../chapter2/practice/ApplesOranges.java      | 28 +++++++++++++++++++
 .../chapter2/solutions/ApplesOranges.java     | 28 +++++++++++++++++++
 2 files changed, 56 insertions(+)
 create mode 100644 src/com/codefortomorrow/beginner/chapter2/practice/ApplesOranges.java
 create mode 100644 src/com/codefortomorrow/beginner/chapter2/solutions/ApplesOranges.java

diff --git a/src/com/codefortomorrow/beginner/chapter2/practice/ApplesOranges.java b/src/com/codefortomorrow/beginner/chapter2/practice/ApplesOranges.java
new file mode 100644
index 0000000..38be171
--- /dev/null
+++ b/src/com/codefortomorrow/beginner/chapter2/practice/ApplesOranges.java
@@ -0,0 +1,28 @@
+package com.codefortomorrow.beginner.chapter2.practice;
+
+/**
+ * @author ArmeetJatyani
+ * March 2021
+ * 
+ * Print out the number of apples and oranges!
+ */
+
+ public class ApplesOranges {
+    public static void main(String[] args) {
+        // write your code here
+        
+        // define an integer variable called numOranges with value 10 (line 15)
+
+        
+        // define an integer variable called numApples with value 24 (line 18)
+
+        
+        // print out number of oranges, output: "I have 10 oranges." (line 21)
+
+
+        // print out number of apples, output: "I have 24 apples." (line 24)
+
+
+    }
+ }
+   
\ No newline at end of file
diff --git a/src/com/codefortomorrow/beginner/chapter2/solutions/ApplesOranges.java b/src/com/codefortomorrow/beginner/chapter2/solutions/ApplesOranges.java
new file mode 100644
index 0000000..9d35185
--- /dev/null
+++ b/src/com/codefortomorrow/beginner/chapter2/solutions/ApplesOranges.java
@@ -0,0 +1,28 @@
+package com.codefortomorrow.beginner.chapter2.practice;
+
+/**
+ * @author ArmeetJatyani
+ * March 2021
+ * 
+ * Print out the number of apples and oranges!
+ */
+
+ public class ApplesOranges {
+    public static void main(String[] args) {
+        // write your code here
+        
+        // define an integer variable called numOranges with value 10 (line 15)
+        int numOranges = 10;
+        
+        // define an integer variable called numApples with value 24 (line 18)
+        int numApples = 24;
+        
+        // print out number of oranges, output: "I have 10 oranges." (line 21)
+        System.out.println("I have " + numOranges + " oranges.");
+
+        // print out number of apples, output: "I have 24 apples." (line 24)
+        System.out.println("I have " + numApples + " apples.");
+
+    }
+ }
+   
\ No newline at end of file

From 3c4a0932d5db33c45a64ffbba701ba00937a5037 Mon Sep 17 00:00:00 2001
From: ArmeetJatyani <armeetjatyani@gmail.com>
Date: Mon, 15 Mar 2021 11:58:26 -0700
Subject: [PATCH 06/31] finished CarDealership exercise

---
 .../chapter4/practice/CarDealership.java      | 28 +++++++++++++++++++
 .../chapter4/solutions/CarDealership.java     | 28 +++++++++++++++++++
 2 files changed, 56 insertions(+)
 create mode 100644 src/com/codefortomorrow/beginner/chapter4/practice/CarDealership.java
 create mode 100644 src/com/codefortomorrow/beginner/chapter4/solutions/CarDealership.java

diff --git a/src/com/codefortomorrow/beginner/chapter4/practice/CarDealership.java b/src/com/codefortomorrow/beginner/chapter4/practice/CarDealership.java
new file mode 100644
index 0000000..df2013f
--- /dev/null
+++ b/src/com/codefortomorrow/beginner/chapter4/practice/CarDealership.java
@@ -0,0 +1,28 @@
+package com.codefortomorrow.beginner.chapter4.practice;
+
+/**
+ * @author ArmeetJatyani
+ * March 2021
+ * 
+ * Manage a car dealership and take inventory of all cars sold!
+ */
+
+ public class CarDealership {
+    public static void main(String[] args) {
+        // write your code here
+        
+        // define 3 integer constants, representing the prices of 3 cars sold in USD (line 15-17)
+        
+
+        
+
+        // define an integer variable, which represents the sum of the prices of these 3 cars (line 20)
+        
+        
+        // print out the formatted revenue after selling these 3 cars, output: "I sold 3 cars for $XXXXXX." (line 23)
+        
+
+
+    }
+ }
+   
\ No newline at end of file
diff --git a/src/com/codefortomorrow/beginner/chapter4/solutions/CarDealership.java b/src/com/codefortomorrow/beginner/chapter4/solutions/CarDealership.java
new file mode 100644
index 0000000..fa3b1f4
--- /dev/null
+++ b/src/com/codefortomorrow/beginner/chapter4/solutions/CarDealership.java
@@ -0,0 +1,28 @@
+package com.codefortomorrow.beginner.chapter4.practice;
+
+/**
+ * @author ArmeetJatyani
+ * March 2021
+ * 
+ * Manage a car dealership and take inventory of all cars sold!
+ */
+
+ public class CarDealership {
+    public static void main(String[] args) {
+        // write your code here
+        
+        // define 3 integer constants, representing the prices of 3 cars sold in USD (line 15-17)
+        final int car1 = 30000;
+        final int car2 = 24650;
+        final int car3 = 253630;
+
+        // define an integer variable, which represents the sum of the prices of these 3 cars (line 20)
+        int revenue = car1 + car2 + car3;
+        
+        // print out the formatted revenue after selling these 3 cars, output: "I sold 3 cars for $XXXXXX." (line 23)
+        System.out.println("I sold 3 cars for $" + revenue + ".");
+
+
+    }
+ }
+   
\ No newline at end of file

From f1858cbec7a53a3d9c1040eba0925a21e3db0a03 Mon Sep 17 00:00:00 2001
From: ArmeetJatyani <armeetjatyani@gmail.com>
Date: Mon, 15 Mar 2021 12:09:51 -0700
Subject: [PATCH 07/31] completed LinkedList implementation Challenge for
 Advanced Group

---
 .../chapter16/practice/LinkedList.java        |  26 +++
 .../chapter16/solutions/LinkedList.java       | 159 ++++++++++++++++++
 2 files changed, 185 insertions(+)
 create mode 100644 src/com/codefortomorrow/advanced/chapter16/practice/LinkedList.java
 create mode 100644 src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java

diff --git a/src/com/codefortomorrow/advanced/chapter16/practice/LinkedList.java b/src/com/codefortomorrow/advanced/chapter16/practice/LinkedList.java
new file mode 100644
index 0000000..6fe8bb7
--- /dev/null
+++ b/src/com/codefortomorrow/advanced/chapter16/practice/LinkedList.java
@@ -0,0 +1,26 @@
+package com.codefortomorrow.advanced.chapter16.practice;
+
+/**
+ * @author ArmeetJatyani
+ * March 2021
+ * 
+ * Implement a simple LinkedList
+ * You will need to create a LinkedListNode class, which represents each item/node in the linked list
+ * Required functionality...
+ * - head(): get head of list
+ * - tail(): get tail of list
+ * - add(): add to tail of list
+ * - push(): push to head of list
+ * - pop(): remove head of list
+ * - toString(): return a String representation of the list
+ */
+
+public class LinkedList {
+    public static void main(String[] args) {
+        // write your code here
+        
+    }
+
+}
+
+class LinkedListNode
\ No newline at end of file
diff --git a/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java b/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java
new file mode 100644
index 0000000..b9d18ae
--- /dev/null
+++ b/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java
@@ -0,0 +1,159 @@
+package com.codefortomorrow.advanced.chapter16.solutions;
+
+// using Lombok for Getters and Setters
+import lombok.Setter;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.Setter;
+// UUID to represent each node's unique ID
+import java.util.UUID;
+
+/**
+ * @author ArmeetJatyani
+ * March 2021
+ * 
+ * Implement a simple LinkedList
+ * You will need to create a LinkedListNode class, which represents each item/node in the linked list
+ * Required functionality...
+ * - head(): get head of list
+ * - tail(): get tail of list
+ * - add(): add to tail of list
+ * - push(): push to head of list
+ * - pop(): remove head of list
+ * - toString(): return a String representation of the list
+ */
+
+@Setter
+public class LinkedList {
+    private LinkedListNode head;
+
+    /**
+     * default constructor
+     */
+    public LinkedList() {
+        head = null;
+    }
+
+    /**
+     * constructor with first value
+     * @param value
+     */
+    public LinkedList(int value) {
+        // create first node
+        head = new LinkedListNode(value, null);
+    }
+
+    /**
+     * get head of Linked List
+     * @return
+     */
+    public LinkedListNode head() {
+        return this.head;
+    }
+
+    /**
+     * traverse and get tail of linked list
+     * @return
+     */
+    public LinkedListNode tail() {
+        LinkedListNode current = head;
+        if(current == null) return null;
+
+        while (current.getNext() != null) {
+            current = current.getNext();
+        }
+
+        return current;
+    }
+
+    /**
+     * add new element (node) to linked list
+     * @param value
+     */
+    public void add(int value) {
+        LinkedListNode tail = tail();
+        if (tail == null) {
+            head = new LinkedListNode(value, null);
+            return;
+        }
+
+        tail.setNext(new LinkedListNode(value, null));
+    }
+
+    /**
+     * push (add to head of linkedlist)
+     * @return
+     */
+    public void push(int value) {
+        LinkedListNode newHead = new LinkedListNode(value, head);
+        head = newHead;
+    }
+
+    /**
+     * pop (remove head of linkedlist)
+     * @return
+     */
+    public LinkedListNode pop() {
+        LinkedListNode popped = head;
+        head = head.getNext();
+        return popped;
+    }
+
+    /**
+     * to String
+     * @return
+     */
+    @Override
+    public String toString() {
+        String list = "[";
+        LinkedListNode current = head;
+        if(current == null) return null;
+        do {
+            list += Integer.toString(current.getValue()) + ", ";
+            current = current.getNext();
+        }
+        while (current != null);
+
+        list = list.substring(0, list.length() - 2);
+        return list + "]";
+    }
+
+}
+
+@Getter
+@Setter
+class Node
+{
+    private UUID ID;
+    private int value;
+
+    public Node(int value)
+    {
+        this.ID = UUID.randomUUID();
+        this.value = value;
+    }
+
+    public int value()
+    {
+        return this.value;
+    }
+}
+ 
+@Getter
+@Setter
+class LinkedListNode extends Node
+{
+    private LinkedListNode next;
+
+    public LinkedListNode(int value, LinkedListNode next)
+    {
+        super(value);
+        this.next = next;
+    }
+
+    public LinkedListNode next()
+    {
+        return this.next;
+    }
+}
+

From cfc050cf94f96eae351cf447a0b0388f2777a6af Mon Sep 17 00:00:00 2001
From: ArmeetJatyani <armeetjatyani@gmail.com>
Date: Mon, 15 Mar 2021 12:13:24 -0700
Subject: [PATCH 08/31] fix package name errors for Solutions

---
 .../codefortomorrow/beginner/chapter1/solutions/Comments.java   | 2 +-
 .../codefortomorrow/beginner/chapter1/solutions/HelloWorld.java | 2 +-
 .../beginner/chapter2/solutions/ApplesOranges.java              | 2 +-
 .../beginner/chapter2/solutions/VariableTypes.java              | 2 +-
 .../beginner/chapter4/solutions/CarDealership.java              | 2 +-
 5 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/com/codefortomorrow/beginner/chapter1/solutions/Comments.java b/src/com/codefortomorrow/beginner/chapter1/solutions/Comments.java
index a14a123..446b385 100644
--- a/src/com/codefortomorrow/beginner/chapter1/solutions/Comments.java
+++ b/src/com/codefortomorrow/beginner/chapter1/solutions/Comments.java
@@ -1,4 +1,4 @@
-package com.codefortomorrow.beginner.chapter1.practice;
+package com.codefortomorrow.beginner.chapter1.solutions;
 
 /**
  * @author ArmeetJatyani
diff --git a/src/com/codefortomorrow/beginner/chapter1/solutions/HelloWorld.java b/src/com/codefortomorrow/beginner/chapter1/solutions/HelloWorld.java
index dbce821..39a0de1 100644
--- a/src/com/codefortomorrow/beginner/chapter1/solutions/HelloWorld.java
+++ b/src/com/codefortomorrow/beginner/chapter1/solutions/HelloWorld.java
@@ -1,4 +1,4 @@
-package com.codefortomorrow.beginner.chapter1.practice;
+package com.codefortomorrow.beginner.chapter1.solutions;
 
 /**
  * @author ArmeetJatyani
diff --git a/src/com/codefortomorrow/beginner/chapter2/solutions/ApplesOranges.java b/src/com/codefortomorrow/beginner/chapter2/solutions/ApplesOranges.java
index 9d35185..28270b4 100644
--- a/src/com/codefortomorrow/beginner/chapter2/solutions/ApplesOranges.java
+++ b/src/com/codefortomorrow/beginner/chapter2/solutions/ApplesOranges.java
@@ -1,4 +1,4 @@
-package com.codefortomorrow.beginner.chapter2.practice;
+package com.codefortomorrow.beginner.chapter2.solutions;
 
 /**
  * @author ArmeetJatyani
diff --git a/src/com/codefortomorrow/beginner/chapter2/solutions/VariableTypes.java b/src/com/codefortomorrow/beginner/chapter2/solutions/VariableTypes.java
index f58142b..d85af80 100644
--- a/src/com/codefortomorrow/beginner/chapter2/solutions/VariableTypes.java
+++ b/src/com/codefortomorrow/beginner/chapter2/solutions/VariableTypes.java
@@ -1,4 +1,4 @@
-package com.codefortomorrow.beginner.chapter2.practice;
+package com.codefortomorrow.beginner.chapter2.solutions;
 
 /**
  * @author ArmeetJatyani
diff --git a/src/com/codefortomorrow/beginner/chapter4/solutions/CarDealership.java b/src/com/codefortomorrow/beginner/chapter4/solutions/CarDealership.java
index fa3b1f4..10fdd82 100644
--- a/src/com/codefortomorrow/beginner/chapter4/solutions/CarDealership.java
+++ b/src/com/codefortomorrow/beginner/chapter4/solutions/CarDealership.java
@@ -1,4 +1,4 @@
-package com.codefortomorrow.beginner.chapter4.practice;
+package com.codefortomorrow.beginner.chapter4.solutions;
 
 /**
  * @author ArmeetJatyani

From db58c32aee32be614f4029126a839eaac5494d9c Mon Sep 17 00:00:00 2001
From: ArmeetJatyani <armeetjatyani@gmail.com>
Date: Mon, 15 Mar 2021 12:24:43 -0700
Subject: [PATCH 09/31] formatted

---
 .../chapter16/solutions/LinkedList.java        | 18 ++++++------------
 1 file changed, 6 insertions(+), 12 deletions(-)

diff --git a/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java b/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java
index b9d18ae..0dbe171 100644
--- a/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java
+++ b/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java
@@ -122,37 +122,31 @@ public String toString() {
 
 @Getter
 @Setter
-class Node
-{
+class Node {
     private UUID ID;
     private int value;
 
-    public Node(int value)
-    {
+    public Node(int value) {
         this.ID = UUID.randomUUID();
         this.value = value;
     }
 
-    public int value()
-    {
+    public int value() {
         return this.value;
     }
 }
  
 @Getter
 @Setter
-class LinkedListNode extends Node
-{
+class LinkedListNode extends Node {
     private LinkedListNode next;
 
-    public LinkedListNode(int value, LinkedListNode next)
-    {
+    public LinkedListNode(int value, LinkedListNode next) {
         super(value);
         this.next = next;
     }
 
-    public LinkedListNode next()
-    {
+    public LinkedListNode next() {
         return this.next;
     }
 }

From 542423bdc96bedc8cc36ecf75b48a457071f2b8a Mon Sep 17 00:00:00 2001
From: ArmeetJatyani <armeetjatyani@gmail.com>
Date: Mon, 15 Mar 2021 12:27:20 -0700
Subject: [PATCH 10/31] attempt #2: fixing formatting

---
 .../chapter16/practice/LinkedList.java        |  8 +++----
 .../chapter16/solutions/LinkedList.java       | 24 +++++++++----------
 2 files changed, 16 insertions(+), 16 deletions(-)

diff --git a/src/com/codefortomorrow/advanced/chapter16/practice/LinkedList.java b/src/com/codefortomorrow/advanced/chapter16/practice/LinkedList.java
index 6fe8bb7..834202e 100644
--- a/src/com/codefortomorrow/advanced/chapter16/practice/LinkedList.java
+++ b/src/com/codefortomorrow/advanced/chapter16/practice/LinkedList.java
@@ -3,7 +3,7 @@
 /**
  * @author ArmeetJatyani
  * March 2021
- * 
+ *
  * Implement a simple LinkedList
  * You will need to create a LinkedListNode class, which represents each item/node in the linked list
  * Required functionality...
@@ -16,11 +16,11 @@
  */
 
 public class LinkedList {
+
     public static void main(String[] args) {
         // write your code here
-        
-    }
 
+    }
 }
 
-class LinkedListNode
\ No newline at end of file
+class LinkedListNode {}
diff --git a/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java b/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java
index 0dbe171..704e67e 100644
--- a/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java
+++ b/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java
@@ -1,17 +1,17 @@
 package com.codefortomorrow.advanced.chapter16.solutions;
 
-// using Lombok for Getters and Setters
-import lombok.Setter;
+// UUID to represent each node's unique ID
+import java.util.UUID;
 import lombok.AllArgsConstructor;
 import lombok.Getter;
+// using Lombok for Getters and Setters
+import lombok.Setter;
 import lombok.Setter;
-// UUID to represent each node's unique ID
-import java.util.UUID;
 
 /**
  * @author ArmeetJatyani
  * March 2021
- * 
+ *
  * Implement a simple LinkedList
  * You will need to create a LinkedListNode class, which represents each item/node in the linked list
  * Required functionality...
@@ -25,6 +25,7 @@
 
 @Setter
 public class LinkedList {
+
     private LinkedListNode head;
 
     /**
@@ -57,7 +58,7 @@ public LinkedListNode head() {
      */
     public LinkedListNode tail() {
         LinkedListNode current = head;
-        if(current == null) return null;
+        if (current == null) return null;
 
         while (current.getNext() != null) {
             current = current.getNext();
@@ -107,22 +108,21 @@ public LinkedListNode pop() {
     public String toString() {
         String list = "[";
         LinkedListNode current = head;
-        if(current == null) return null;
+        if (current == null) return null;
         do {
             list += Integer.toString(current.getValue()) + ", ";
             current = current.getNext();
-        }
-        while (current != null);
+        } while (current != null);
 
         list = list.substring(0, list.length() - 2);
         return list + "]";
     }
-
 }
 
 @Getter
 @Setter
 class Node {
+
     private UUID ID;
     private int value;
 
@@ -135,10 +135,11 @@ public int value() {
         return this.value;
     }
 }
- 
+
 @Getter
 @Setter
 class LinkedListNode extends Node {
+
     private LinkedListNode next;
 
     public LinkedListNode(int value, LinkedListNode next) {
@@ -150,4 +151,3 @@ public LinkedListNode next() {
         return this.next;
     }
 }
-

From 85bda2c3b1ede2007e69b2c15285b56589ade446 Mon Sep 17 00:00:00 2001
From: ArmeetJatyani <armeetjatyani@gmail.com>
Date: Mon, 15 Mar 2021 14:43:18 -0700
Subject: [PATCH 11/31] adding to comments

---
 .../advanced/chapter16/solutions/LinkedList.java                | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java b/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java
index 704e67e..debfb34 100644
--- a/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java
+++ b/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java
@@ -4,7 +4,7 @@
 import java.util.UUID;
 import lombok.AllArgsConstructor;
 import lombok.Getter;
-// using Lombok for Getters and Setters
+// using Lombok for Getters and Setters (saves lines)
 import lombok.Setter;
 import lombok.Setter;
 

From e92fb417735dc9f608a56d26f7a9ebadcd9b5f1f Mon Sep 17 00:00:00 2001
From: Armeet Jatyani <armeetjatyani@gmail.com>
Date: Mon, 15 Mar 2021 17:14:33 -0700
Subject: [PATCH 12/31] Update
 src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java

Co-authored-by: Rebecca Dang <35876322+phrdang@users.noreply.github.com>
---
 .../advanced/chapter16/solutions/LinkedList.java                | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java b/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java
index debfb34..19c6d18 100644
--- a/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java
+++ b/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java
@@ -61,7 +61,7 @@ public LinkedListNode tail() {
         if (current == null) return null;
 
         while (current.getNext() != null) {
-            current = current.getNext();
+            current = current.next();
         }
 
         return current;

From f6977c7b22c5bd5376bd743c987e99651f68a4a2 Mon Sep 17 00:00:00 2001
From: Armeet Jatyani <armeetjatyani@gmail.com>
Date: Mon, 15 Mar 2021 17:14:51 -0700
Subject: [PATCH 13/31] Update
 src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java

Co-authored-by: Rebecca Dang <35876322+phrdang@users.noreply.github.com>
---
 .../codefortomorrow/advanced/chapter16/solutions/LinkedList.java | 1 -
 1 file changed, 1 deletion(-)

diff --git a/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java b/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java
index 19c6d18..5da7b83 100644
--- a/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java
+++ b/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java
@@ -75,7 +75,6 @@ public void add(int value) {
         LinkedListNode tail = tail();
         if (tail == null) {
             head = new LinkedListNode(value, null);
-            return;
         }
 
         tail.setNext(new LinkedListNode(value, null));

From cca23c28f9924d178f83d2a1cc687908064ab964 Mon Sep 17 00:00:00 2001
From: Armeet Jatyani <armeetjatyani@gmail.com>
Date: Mon, 15 Mar 2021 17:15:00 -0700
Subject: [PATCH 14/31] Update
 src/com/codefortomorrow/beginner/chapter2/practice/VariableTypes.java

Co-authored-by: Rebecca Dang <35876322+phrdang@users.noreply.github.com>
---
 .../beginner/chapter2/practice/VariableTypes.java             | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/com/codefortomorrow/beginner/chapter2/practice/VariableTypes.java b/src/com/codefortomorrow/beginner/chapter2/practice/VariableTypes.java
index a051136..e5b9678 100644
--- a/src/com/codefortomorrow/beginner/chapter2/practice/VariableTypes.java
+++ b/src/com/codefortomorrow/beginner/chapter2/practice/VariableTypes.java
@@ -20,7 +20,7 @@ public static void main(String[] args) {
         // define a double variable on line 21
 
 
-        // define a boolean variable on line 24 (Hint: true/false) on line 24
+        // define a boolean variable on line 24 (Hint: true/false)
 
 
         // define a character variable on line 27
@@ -31,4 +31,4 @@ public static void main(String[] args) {
 
     }
  }
-   
\ No newline at end of file
+   

From 47b672561dc240673993163f9a9e373f2dbf12bd Mon Sep 17 00:00:00 2001
From: Armeet Jatyani <armeetjatyani@gmail.com>
Date: Mon, 15 Mar 2021 17:15:10 -0700
Subject: [PATCH 15/31] Update
 src/com/codefortomorrow/beginner/chapter2/solutions/ApplesOranges.java

Co-authored-by: Rebecca Dang <35876322+phrdang@users.noreply.github.com>
---
 .../beginner/chapter2/solutions/ApplesOranges.java            | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/com/codefortomorrow/beginner/chapter2/solutions/ApplesOranges.java b/src/com/codefortomorrow/beginner/chapter2/solutions/ApplesOranges.java
index 28270b4..ff9e4b3 100644
--- a/src/com/codefortomorrow/beginner/chapter2/solutions/ApplesOranges.java
+++ b/src/com/codefortomorrow/beginner/chapter2/solutions/ApplesOranges.java
@@ -17,7 +17,7 @@ public static void main(String[] args) {
         // define an integer variable called numApples with value 24 (line 18)
         int numApples = 24;
         
-        // print out number of oranges, output: "I have 10 oranges." (line 21)
+        // print out number of oranges using variables, output: "I have 10 oranges." (line 21)
         System.out.println("I have " + numOranges + " oranges.");
 
         // print out number of apples, output: "I have 24 apples." (line 24)
@@ -25,4 +25,4 @@ public static void main(String[] args) {
 
     }
  }
-   
\ No newline at end of file
+   

From 199fb87262fca8da79471c86a00d17bd65fa44d4 Mon Sep 17 00:00:00 2001
From: Armeet Jatyani <armeetjatyani@gmail.com>
Date: Mon, 15 Mar 2021 17:15:15 -0700
Subject: [PATCH 16/31] Update
 src/com/codefortomorrow/beginner/chapter2/solutions/ApplesOranges.java

Co-authored-by: Rebecca Dang <35876322+phrdang@users.noreply.github.com>
---
 .../beginner/chapter2/solutions/ApplesOranges.java              | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/com/codefortomorrow/beginner/chapter2/solutions/ApplesOranges.java b/src/com/codefortomorrow/beginner/chapter2/solutions/ApplesOranges.java
index ff9e4b3..b35c1e9 100644
--- a/src/com/codefortomorrow/beginner/chapter2/solutions/ApplesOranges.java
+++ b/src/com/codefortomorrow/beginner/chapter2/solutions/ApplesOranges.java
@@ -20,7 +20,7 @@ public static void main(String[] args) {
         // print out number of oranges using variables, output: "I have 10 oranges." (line 21)
         System.out.println("I have " + numOranges + " oranges.");
 
-        // print out number of apples, output: "I have 24 apples." (line 24)
+        // print out number of apples using variables, output: "I have 24 apples." (line 24)
         System.out.println("I have " + numApples + " apples.");
 
     }

From 40b86623d2db965d3fc19c26fac7188467ad8971 Mon Sep 17 00:00:00 2001
From: Armeet Jatyani <armeetjatyani@gmail.com>
Date: Mon, 15 Mar 2021 17:15:56 -0700
Subject: [PATCH 17/31] Update
 src/com/codefortomorrow/beginner/chapter2/solutions/VariableTypes.java

Co-authored-by: Rebecca Dang <35876322+phrdang@users.noreply.github.com>
---
 .../beginner/chapter2/solutions/VariableTypes.java            | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/com/codefortomorrow/beginner/chapter2/solutions/VariableTypes.java b/src/com/codefortomorrow/beginner/chapter2/solutions/VariableTypes.java
index d85af80..f6850ce 100644
--- a/src/com/codefortomorrow/beginner/chapter2/solutions/VariableTypes.java
+++ b/src/com/codefortomorrow/beginner/chapter2/solutions/VariableTypes.java
@@ -20,7 +20,7 @@ public static void main(String[] args) {
         // define a double variable on line 21
         double decimal = 23.2352536d;
 
-        // define a boolean variable on line 24 (Hint: true/false) on line 24
+        // define a boolean variable on line 24 (Hint: true/false)
         double dogsOut = true;  // the dogs are out :)
 
         // define a character variable on line 27
@@ -31,4 +31,4 @@ public static void main(String[] args) {
         
     }
  }
-   
\ No newline at end of file
+   

From 1b3fbfda3036d56c80093e55f0385ab529e7c3b2 Mon Sep 17 00:00:00 2001
From: Armeet Jatyani <armeetjatyani@gmail.com>
Date: Mon, 15 Mar 2021 17:16:08 -0700
Subject: [PATCH 18/31] Update
 src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java

Co-authored-by: Rebecca Dang <35876322+phrdang@users.noreply.github.com>
---
 .../advanced/chapter16/solutions/LinkedList.java                | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java b/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java
index 5da7b83..cf19cbe 100644
--- a/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java
+++ b/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java
@@ -75,7 +75,7 @@ public void add(int value) {
         LinkedListNode tail = tail();
         if (tail == null) {
             head = new LinkedListNode(value, null);
-        }
+        } else {
 
         tail.setNext(new LinkedListNode(value, null));
     }

From 66100104f2ee123900633b2512b744ce31a72fb1 Mon Sep 17 00:00:00 2001
From: Armeet Jatyani <armeetjatyani@gmail.com>
Date: Mon, 15 Mar 2021 17:17:10 -0700
Subject: [PATCH 19/31] Update
 src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java

Co-authored-by: Rebecca Dang <35876322+phrdang@users.noreply.github.com>
---
 .../advanced/chapter16/solutions/LinkedList.java               | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java b/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java
index cf19cbe..148ff74 100644
--- a/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java
+++ b/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java
@@ -77,7 +77,8 @@ public void add(int value) {
             head = new LinkedListNode(value, null);
         } else {
 
-        tail.setNext(new LinkedListNode(value, null));
+            tail.setNext(new LinkedListNode(value, null));
+        }
     }
 
     /**

From 84ad074fe073ee6e82dabc2d13805a66fb255ba4 Mon Sep 17 00:00:00 2001
From: Armeet Jatyani <armeetjatyani@gmail.com>
Date: Mon, 15 Mar 2021 17:17:21 -0700
Subject: [PATCH 20/31] Update
 src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java

Co-authored-by: Rebecca Dang <35876322+phrdang@users.noreply.github.com>
---
 .../advanced/chapter16/solutions/LinkedList.java                | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java b/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java
index 148ff74..370ca83 100644
--- a/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java
+++ b/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java
@@ -96,7 +96,7 @@ public void push(int value) {
      */
     public LinkedListNode pop() {
         LinkedListNode popped = head;
-        head = head.getNext();
+        head = head.next();
         return popped;
     }
 

From 640cb85666225340e855552bc9b32bb1ec0def46 Mon Sep 17 00:00:00 2001
From: Armeet Jatyani <armeetjatyani@gmail.com>
Date: Mon, 15 Mar 2021 17:18:26 -0700
Subject: [PATCH 21/31] Update
 src/com/codefortomorrow/advanced/chapter16/practice/LinkedList.java

Co-authored-by: Rebecca Dang <35876322+phrdang@users.noreply.github.com>
---
 .../codefortomorrow/advanced/chapter16/practice/LinkedList.java  | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/com/codefortomorrow/advanced/chapter16/practice/LinkedList.java b/src/com/codefortomorrow/advanced/chapter16/practice/LinkedList.java
index 834202e..04fd4f5 100644
--- a/src/com/codefortomorrow/advanced/chapter16/practice/LinkedList.java
+++ b/src/com/codefortomorrow/advanced/chapter16/practice/LinkedList.java
@@ -6,6 +6,7 @@
  *
  * Implement a simple LinkedList
  * You will need to create a LinkedListNode class, which represents each item/node in the linked list
+ * Assume that the elements in the linked list are all of type int
  * Required functionality...
  * - head(): get head of list
  * - tail(): get tail of list

From 80170097c62be724bcb0e5e7203187b8efcb03a9 Mon Sep 17 00:00:00 2001
From: Armeet Jatyani <armeetjatyani@gmail.com>
Date: Mon, 15 Mar 2021 17:18:40 -0700
Subject: [PATCH 22/31] Update
 src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java

Co-authored-by: Rebecca Dang <35876322+phrdang@users.noreply.github.com>
---
 .../advanced/chapter16/solutions/LinkedList.java                | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java b/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java
index 370ca83..5b26866 100644
--- a/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java
+++ b/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java
@@ -110,7 +110,7 @@ public String toString() {
         LinkedListNode current = head;
         if (current == null) return null;
         do {
-            list += Integer.toString(current.getValue()) + ", ";
+            list += Integer.toString(current.value()) + ", ";
             current = current.getNext();
         } while (current != null);
 

From e4e6db996f893a1b1093aa0f93f8e260dad90ec6 Mon Sep 17 00:00:00 2001
From: Armeet Jatyani <armeetjatyani@gmail.com>
Date: Mon, 15 Mar 2021 17:18:51 -0700
Subject: [PATCH 23/31] Update
 src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java

Co-authored-by: Rebecca Dang <35876322+phrdang@users.noreply.github.com>
---
 .../codefortomorrow/advanced/chapter16/solutions/LinkedList.java | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java b/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java
index 5b26866..245d36b 100644
--- a/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java
+++ b/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java
@@ -114,6 +114,7 @@ public String toString() {
             current = current.getNext();
         } while (current != null);
 
+        // Remove trailing comma and space after last list element
         list = list.substring(0, list.length() - 2);
         return list + "]";
     }

From 9ac5b2d43edc985b5a7268ce94fd95cd036b5338 Mon Sep 17 00:00:00 2001
From: ArmeetJatyani <armeetjatyani@gmail.com>
Date: Mon, 15 Mar 2021 17:20:45 -0700
Subject: [PATCH 24/31] made requested changes

---
 .gitignore                                           |  2 --
 .../advanced/chapter16/solutions/LinkedList.java     | 12 ------------
 2 files changed, 14 deletions(-)

diff --git a/.gitignore b/.gitignore
index 9a0f431..0ec6afc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,5 +5,3 @@
 c4t-java.iml
 .DS_Store
 
-# ignore prettier files
-.prettierrc.json
diff --git a/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java b/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java
index debfb34..75c3dd1 100644
--- a/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java
+++ b/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java
@@ -2,11 +2,6 @@
 
 // UUID to represent each node's unique ID
 import java.util.UUID;
-import lombok.AllArgsConstructor;
-import lombok.Getter;
-// using Lombok for Getters and Setters (saves lines)
-import lombok.Setter;
-import lombok.Setter;
 
 /**
  * @author ArmeetJatyani
@@ -23,7 +18,6 @@
  * - toString(): return a String representation of the list
  */
 
-@Setter
 public class LinkedList {
 
     private LinkedListNode head;
@@ -37,7 +31,6 @@ public LinkedList() {
 
     /**
      * constructor with first value
-     * @param value
      */
     public LinkedList(int value) {
         // create first node
@@ -69,7 +62,6 @@ public LinkedListNode tail() {
 
     /**
      * add new element (node) to linked list
-     * @param value
      */
     public void add(int value) {
         LinkedListNode tail = tail();
@@ -119,8 +111,6 @@ public String toString() {
     }
 }
 
-@Getter
-@Setter
 class Node {
 
     private UUID ID;
@@ -136,8 +126,6 @@ public int value() {
     }
 }
 
-@Getter
-@Setter
 class LinkedListNode extends Node {
 
     private LinkedListNode next;

From 2d8da5dd3f1d449e1510860d8c79bd83bf3ee29a Mon Sep 17 00:00:00 2001
From: ArmeetJatyani <armeetjatyani@gmail.com>
Date: Mon, 15 Mar 2021 17:22:56 -0700
Subject: [PATCH 25/31] made all changes 2

---
 .../advanced/chapter16/solutions/LinkedList.java       | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java b/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java
index 2ba949f..2f77dc2 100644
--- a/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java
+++ b/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java
@@ -53,7 +53,7 @@ public LinkedListNode tail() {
         LinkedListNode current = head;
         if (current == null) return null;
 
-        while (current.getNext() != null) {
+        while (current.next() != null) {
             current = current.next();
         }
 
@@ -68,7 +68,6 @@ public void add(int value) {
         if (tail == null) {
             head = new LinkedListNode(value, null);
         } else {
-
             tail.setNext(new LinkedListNode(value, null));
         }
     }
@@ -103,7 +102,7 @@ public String toString() {
         if (current == null) return null;
         do {
             list += Integer.toString(current.value()) + ", ";
-            current = current.getNext();
+            current = current.next();
         } while (current != null);
 
         // Remove trailing comma and space after last list element
@@ -139,4 +138,9 @@ public LinkedListNode(int value, LinkedListNode next) {
     public LinkedListNode next() {
         return this.next;
     }
+
+    public void setNext(LinkedListNode next) {
+        this.next = next;
+        return;
+    }
 }

From 17cb81d6e776cf8ea3edc1c5b7aadf1b75d12628 Mon Sep 17 00:00:00 2001
From: Armeet Jatyani <armeetjatyani@gmail.com>
Date: Mon, 15 Mar 2021 17:26:41 -0700
Subject: [PATCH 26/31] Update
 src/com/codefortomorrow/beginner/chapter1/practice/HelloWorld.java

Co-authored-by: Rebecca Dang <35876322+phrdang@users.noreply.github.com>
---
 .../beginner/chapter1/practice/HelloWorld.java                | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/com/codefortomorrow/beginner/chapter1/practice/HelloWorld.java b/src/com/codefortomorrow/beginner/chapter1/practice/HelloWorld.java
index e2a15fe..832742a 100644
--- a/src/com/codefortomorrow/beginner/chapter1/practice/HelloWorld.java
+++ b/src/com/codefortomorrow/beginner/chapter1/practice/HelloWorld.java
@@ -10,10 +10,10 @@
  */
 
  // a class is an "object" where we will place all our code inside
- public class HelloWorld{
+ public class HelloWorld {
     // the main method (below) is the first thing that runs when your program is run
     public static void main(String[] args) {
         // write code here (replace the "" with "Hello World!")
         System.out.println("");
     }
- }
\ No newline at end of file
+ }

From acd3db80260f2cd82f3008ddae9a68b1353da769 Mon Sep 17 00:00:00 2001
From: Armeet Jatyani <armeetjatyani@gmail.com>
Date: Mon, 15 Mar 2021 17:26:57 -0700
Subject: [PATCH 27/31] Update
 src/com/codefortomorrow/beginner/chapter2/practice/ApplesOranges.java

Co-authored-by: Rebecca Dang <35876322+phrdang@users.noreply.github.com>
---
 .../beginner/chapter2/practice/ApplesOranges.java             | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/com/codefortomorrow/beginner/chapter2/practice/ApplesOranges.java b/src/com/codefortomorrow/beginner/chapter2/practice/ApplesOranges.java
index 38be171..3a6cb45 100644
--- a/src/com/codefortomorrow/beginner/chapter2/practice/ApplesOranges.java
+++ b/src/com/codefortomorrow/beginner/chapter2/practice/ApplesOranges.java
@@ -17,7 +17,7 @@ public static void main(String[] args) {
         // define an integer variable called numApples with value 24 (line 18)
 
         
-        // print out number of oranges, output: "I have 10 oranges." (line 21)
+        // print out number of oranges using variables, output: "I have 10 oranges." (line 21)
 
 
         // print out number of apples, output: "I have 24 apples." (line 24)
@@ -25,4 +25,4 @@ public static void main(String[] args) {
 
     }
  }
-   
\ No newline at end of file
+   

From 09959381b5dfd3e524a7db1b30f3cc87478613f3 Mon Sep 17 00:00:00 2001
From: Armeet Jatyani <armeetjatyani@gmail.com>
Date: Mon, 15 Mar 2021 17:27:03 -0700
Subject: [PATCH 28/31] Update
 src/com/codefortomorrow/beginner/chapter2/practice/ApplesOranges.java

Co-authored-by: Rebecca Dang <35876322+phrdang@users.noreply.github.com>
---
 .../beginner/chapter2/practice/ApplesOranges.java               | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/com/codefortomorrow/beginner/chapter2/practice/ApplesOranges.java b/src/com/codefortomorrow/beginner/chapter2/practice/ApplesOranges.java
index 3a6cb45..bb28674 100644
--- a/src/com/codefortomorrow/beginner/chapter2/practice/ApplesOranges.java
+++ b/src/com/codefortomorrow/beginner/chapter2/practice/ApplesOranges.java
@@ -20,7 +20,7 @@ public static void main(String[] args) {
         // print out number of oranges using variables, output: "I have 10 oranges." (line 21)
 
 
-        // print out number of apples, output: "I have 24 apples." (line 24)
+        // print out number of apples using variables, output: "I have 24 apples." (line 24)
 
 
     }

From 508db44ef4c6d814289390d83caf3bcd220935ee Mon Sep 17 00:00:00 2001
From: Rebecca Dang <ph.rdang@gmail.com>
Date: Tue, 16 Mar 2021 15:24:33 -0700
Subject: [PATCH 29/31] Update/add javadoc comments (for consistency)

---
 .../chapter16/solutions/LinkedList.java       | 39 +++++++++++++++----
 1 file changed, 31 insertions(+), 8 deletions(-)

diff --git a/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java b/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java
index 2f77dc2..848e482 100644
--- a/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java
+++ b/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java
@@ -9,6 +9,7 @@
  *
  * Implement a simple LinkedList
  * You will need to create a LinkedListNode class, which represents each item/node in the linked list
+ * Assume that the elements in the linked list are all of type int
  * Required functionality...
  * - head(): get head of list
  * - tail(): get tail of list
@@ -31,6 +32,7 @@ public LinkedList() {
 
     /**
      * constructor with first value
+     * @param value  first element in the linked list
      */
     public LinkedList(int value) {
         // create first node
@@ -39,7 +41,7 @@ public LinkedList(int value) {
 
     /**
      * get head of Linked List
-     * @return
+     * @return first element of the linked list
      */
     public LinkedListNode head() {
         return this.head;
@@ -47,7 +49,7 @@ public LinkedListNode head() {
 
     /**
      * traverse and get tail of linked list
-     * @return
+     * @return last element of the linked list
      */
     public LinkedListNode tail() {
         LinkedListNode current = head;
@@ -62,6 +64,7 @@ public LinkedListNode tail() {
 
     /**
      * add new element (node) to linked list
+     * @param value  element to add to the end of the linked list
      */
     public void add(int value) {
         LinkedListNode tail = tail();
@@ -73,8 +76,7 @@ public void add(int value) {
     }
 
     /**
-     * push (add to head of linkedlist)
-     * @return
+     * push (add element to head of linkedlist)
      */
     public void push(int value) {
         LinkedListNode newHead = new LinkedListNode(value, head);
@@ -82,8 +84,8 @@ public void push(int value) {
     }
 
     /**
-     * pop (remove head of linkedlist)
-     * @return
+     * pop (remove and return head of linkedlist)
+     * @return the node that was removed
      */
     public LinkedListNode pop() {
         LinkedListNode popped = head;
@@ -92,8 +94,8 @@ public LinkedListNode pop() {
     }
 
     /**
-     * to String
-     * @return
+     * Returns a String version of the LinkedList
+     * @return a String version of the LinkedList
      */
     @Override
     public String toString() {
@@ -116,11 +118,19 @@ class Node {
     private UUID ID;
     private int value;
 
+    /**
+     * Constructs a list node with the given value
+     * @param value  the value stored in this Node
+     */
     public Node(int value) {
         this.ID = UUID.randomUUID();
         this.value = value;
     }
 
+    /**
+     * Returns the value of this Node
+     * @return the value of this Node
+     */
     public int value() {
         return this.value;
     }
@@ -130,15 +140,28 @@ class LinkedListNode extends Node {
 
     private LinkedListNode next;
 
+    /**
+     * Constructs a LinkedListNode
+     * @param value  the value stored in this node
+     * @param next  the next node
+     */
     public LinkedListNode(int value, LinkedListNode next) {
         super(value);
         this.next = next;
     }
 
+    /**
+     * Returns the next node
+     * @return the next node
+     */
     public LinkedListNode next() {
         return this.next;
     }
 
+    /**
+     * Sets the next node
+     * @param next  the next node
+     */
     public void setNext(LinkedListNode next) {
         this.next = next;
         return;

From 44713c450ca0f4208d10f17637b825716637e04a Mon Sep 17 00:00:00 2001
From: ArmeetJatyani <armeetjatyani@gmail.com>
Date: Mon, 22 Mar 2021 11:09:16 -0700
Subject: [PATCH 30/31] revision 3

---
 .../advanced/chapter16/solutions/LinkedList.java             | 5 -----
 .../beginner/chapter2/solutions/VariableTypes.java           | 2 +-
 2 files changed, 1 insertion(+), 6 deletions(-)

diff --git a/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java b/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java
index 2f77dc2..1d69417 100644
--- a/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java
+++ b/src/com/codefortomorrow/advanced/chapter16/solutions/LinkedList.java
@@ -1,8 +1,5 @@
 package com.codefortomorrow.advanced.chapter16.solutions;
 
-// UUID to represent each node's unique ID
-import java.util.UUID;
-
 /**
  * @author ArmeetJatyani
  * March 2021
@@ -113,11 +110,9 @@ public String toString() {
 
 class Node {
 
-    private UUID ID;
     private int value;
 
     public Node(int value) {
-        this.ID = UUID.randomUUID();
         this.value = value;
     }
 
diff --git a/src/com/codefortomorrow/beginner/chapter2/solutions/VariableTypes.java b/src/com/codefortomorrow/beginner/chapter2/solutions/VariableTypes.java
index f6850ce..0a3a64e 100644
--- a/src/com/codefortomorrow/beginner/chapter2/solutions/VariableTypes.java
+++ b/src/com/codefortomorrow/beginner/chapter2/solutions/VariableTypes.java
@@ -15,7 +15,7 @@ public static void main(String[] args) {
         int age = 23;
         
         // define a float variable on line 18
-        float pi = 3.14f;
+        float decimal = 23.32544f;
         
         // define a double variable on line 21
         double decimal = 23.2352536d;

From 48dc66b16bf09c52caf6c13e078a8906f9c130ca Mon Sep 17 00:00:00 2001
From: Armeet Jatyani <armeetjatyani@gmail.com>
Date: Tue, 23 Mar 2021 10:14:01 -0700
Subject: [PATCH 31/31] Update
 src/com/codefortomorrow/beginner/chapter1/solutions/HelloWorld.java

Co-authored-by: JJ27 <66833672+JJ27@users.noreply.github.com>
---
 .../beginner/chapter1/solutions/HelloWorld.java               | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/com/codefortomorrow/beginner/chapter1/solutions/HelloWorld.java b/src/com/codefortomorrow/beginner/chapter1/solutions/HelloWorld.java
index 39a0de1..a1152d2 100644
--- a/src/com/codefortomorrow/beginner/chapter1/solutions/HelloWorld.java
+++ b/src/com/codefortomorrow/beginner/chapter1/solutions/HelloWorld.java
@@ -10,10 +10,10 @@
  */
 
  // a class is an "object" where we will place all our code inside
- public class HelloWorld{
+ public class HelloWorld {
     // the main method (below) is the first thing that runs when your program is run
     public static void main(String[] args) {
         // write code here (replace the "" with "Hello World!")
         System.out.println("Hello World!");
     }
- }
\ No newline at end of file
+ }