From fde04e92f3fa9e46faebebb5e540da13279f8f40 Mon Sep 17 00:00:00 2001
From: AI <182692506+AhmedIhsan123@users.noreply.github.com>
Date: Sun, 28 Sep 2025 18:26:39 -0700
Subject: [PATCH 01/13] Setup basic variables needed for file

---
 src/NumberPractice.java | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/NumberPractice.java b/src/NumberPractice.java
index bbec2fe..6082770 100644
--- a/src/NumberPractice.java
+++ b/src/NumberPractice.java
@@ -1,10 +1,13 @@
 public class NumberPractice {
   public static void main(String args[]) {
     // Create a float with a negative value and assign it to a variable
+    float negativeFloat = -1.0f;
 
     // Create an int with a positive value and assign it to a variable
+    int positiveInt = 14;
 
     // Use the modulo % operator to find the remainder when the int is divided by 3
+    int remainder = (positiveInt % 3);
 
     // Use the modulo % operator to determine whether the number is even
     // (A number is even if it has a remainder of zero when divided by 2)

From 0a12aeca1029107a9a362a151ab0db604a5aabab Mon Sep 17 00:00:00 2001
From: AI <182692506+AhmedIhsan123@users.noreply.github.com>
Date: Sun, 28 Sep 2025 18:36:17 -0700
Subject: [PATCH 02/13] Add check even/odd functionality to file

---
 src/NumberPractice.java | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/NumberPractice.java b/src/NumberPractice.java
index 6082770..1d8592c 100644
--- a/src/NumberPractice.java
+++ b/src/NumberPractice.java
@@ -4,7 +4,7 @@ public static void main(String args[]) {
     float negativeFloat = -1.0f;
 
     // Create an int with a positive value and assign it to a variable
-    int positiveInt = 14;
+    int positiveInt = 15;
 
     // Use the modulo % operator to find the remainder when the int is divided by 3
     int remainder = (positiveInt % 3);
@@ -13,7 +13,12 @@ public static void main(String args[]) {
     // (A number is even if it has a remainder of zero when divided by 2)
     // Use an if-else to print "Even" if the number is even and "Odd"
     // if the number is odd.
-
+    if (positiveInt % 2 == 0) {
+      System.out.println("Number is Odd!");
+    } else {
+      System.out.println("Number is Even!");
+    }
+    
     // Divide the number by another number using integer division
 
     /*

From 36c898a3cf5b6c1e9d9f0848fcf5f7ea7050daba Mon Sep 17 00:00:00 2001
From: AI <182692506+AhmedIhsan123@users.noreply.github.com>
Date: Sun, 28 Sep 2025 18:41:11 -0700
Subject: [PATCH 03/13] Fixed bug with if statment and added the final integer
 division

---
 src/NumberPractice.java | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/NumberPractice.java b/src/NumberPractice.java
index 1d8592c..5df7af2 100644
--- a/src/NumberPractice.java
+++ b/src/NumberPractice.java
@@ -13,13 +13,14 @@ public static void main(String args[]) {
     // (A number is even if it has a remainder of zero when divided by 2)
     // Use an if-else to print "Even" if the number is even and "Odd"
     // if the number is odd.
-    if (positiveInt % 2 == 0) {
-      System.out.println("Number is Odd!");
+    if ((positiveInt % 2) == 0) {
+      System.out.println("Even!");
     } else {
-      System.out.println("Number is Even!");
+      System.out.println("Odd!");
     }
     
     // Divide the number by another number using integer division
+    int dividedNum = positiveInt / 5;
 
     /*
      * Reminder!

From 001bc750e8776394c21288be348d980481eaf77b Mon Sep 17 00:00:00 2001
From: AI <182692506+AhmedIhsan123@users.noreply.github.com>
Date: Sun, 28 Sep 2025 18:44:13 -0700
Subject: [PATCH 04/13] Number Practice file final build, stable.

---
 src/NumberPractice.java | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/NumberPractice.java b/src/NumberPractice.java
index 5df7af2..7b6fef2 100644
--- a/src/NumberPractice.java
+++ b/src/NumberPractice.java
@@ -2,12 +2,14 @@ public class NumberPractice {
   public static void main(String args[]) {
     // Create a float with a negative value and assign it to a variable
     float negativeFloat = -1.0f;
+    System.out.println("Negative Float Value: " + negativeFloat);
 
     // Create an int with a positive value and assign it to a variable
     int positiveInt = 15;
 
     // Use the modulo % operator to find the remainder when the int is divided by 3
     int remainder = (positiveInt % 3);
+    System.out.println("Remainder: " + remainder);
 
     // Use the modulo % operator to determine whether the number is even
     // (A number is even if it has a remainder of zero when divided by 2)
@@ -21,6 +23,7 @@ public static void main(String args[]) {
     
     // Divide the number by another number using integer division
     int dividedNum = positiveInt / 5;
+    System.out.println("Integer Division: " + dividedNum);
 
     /*
      * Reminder!

From 706db7dd720a0f0554ffce83a5b5ddfcae9ae502 Mon Sep 17 00:00:00 2001
From: AI <182692506+AhmedIhsan123@users.noreply.github.com>
Date: Sun, 28 Sep 2025 18:53:16 -0700
Subject: [PATCH 05/13] Array creation and population

---
 src/ListPractice.java | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/ListPractice.java b/src/ListPractice.java
index f4de8e7..b8bebb4 100644
--- a/src/ListPractice.java
+++ b/src/ListPractice.java
@@ -1,20 +1,30 @@
+import java.util.ArrayList;
+
 public class ListPractice {
 
 
   public static void main(String[] args) {
     // Create an empty ArrayList of Strings and assign it to a variable of type List
+    ArrayList<String> myStrings = new ArrayList<>();
 
     // Add 3 elements to the list (OK to do one-by-one)
+    myStrings.add("String #1");
+    myStrings.add("String #2");
+    myStrings.add("String #3");
 
     // Print the element at index 1
+    System.out.println(myStrings.get(1));
 
     // Replace the element at index 1 with a new value
     // (Do not insert a new value. The length of the list should not change)
+    myStrings.set(1, "New String #2");
 
     // Insert a new element at index 0 (the length of the list will change)
+    myStrings.addFirst("New First Element!");
 
     // Check whether the list contains a certain string
 
+
     // Iterate over the list using a traditional for-loop.
     // Print each index and value on a separate line
 

From 0f5e602640b1e1ee9f65618c312fc3cfa280ed42 Mon Sep 17 00:00:00 2001
From: AI <182692506+AhmedIhsan123@users.noreply.github.com>
Date: Sun, 28 Sep 2025 19:06:01 -0700
Subject: [PATCH 06/13] List practice file complete, stable.

---
 src/ListPractice.java | 23 ++++++++++++++++-------
 1 file changed, 16 insertions(+), 7 deletions(-)

diff --git a/src/ListPractice.java b/src/ListPractice.java
index b8bebb4..173d110 100644
--- a/src/ListPractice.java
+++ b/src/ListPractice.java
@@ -1,37 +1,46 @@
 import java.util.ArrayList;
+import java.util.Collections;
 
 public class ListPractice {
 
-
   public static void main(String[] args) {
     // Create an empty ArrayList of Strings and assign it to a variable of type List
     ArrayList<String> myStrings = new ArrayList<>();
 
     // Add 3 elements to the list (OK to do one-by-one)
-    myStrings.add("String #1");
-    myStrings.add("String #2");
-    myStrings.add("String #3");
+    myStrings.add("I love dogs!");
+    myStrings.add("Hey there.");
+    myStrings.add("Avengers, assemble.");
 
     // Print the element at index 1
     System.out.println(myStrings.get(1));
 
     // Replace the element at index 1 with a new value
     // (Do not insert a new value. The length of the list should not change)
-    myStrings.set(1, "New String #2");
+    myStrings.set(1, "Woah, I'm different!");
 
     // Insert a new element at index 0 (the length of the list will change)
-    myStrings.addFirst("New First Element!");
+    myStrings.addFirst("New guy here...");
 
     // Check whether the list contains a certain string
-
+    // EXPECTED: TRUE
+    System.out.println("Contains new guy?: " + myStrings.contains("New guy here..."));
 
     // Iterate over the list using a traditional for-loop.
     // Print each index and value on a separate line
+    for (int i = 0; i < myStrings.size(); i++) {
+      System.out.println("[" + myStrings.get(i) + "]" + " at " + "index " + i);
+    }
 
     // Sort the list using the Collections library
+    Collections.sort(myStrings);
 
     // Iterate over the list using a for-each loop
     // Print each value on a second line
+    System.out.println();
+    for (String x : myStrings) {
+      System.out.println(x);
+    }
 
     /*
      * Usage tip!

From eae91584a59f1b59961e3f7095f4d4e28b589080 Mon Sep 17 00:00:00 2001
From: AI <182692506+AhmedIhsan123@users.noreply.github.com>
Date: Sun, 28 Sep 2025 19:47:32 -0700
Subject: [PATCH 07/13] Completed Array Practice file, Stable.

---
 src/ArrayPractice.java | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/src/ArrayPractice.java b/src/ArrayPractice.java
index bc58c83..1f39fd6 100644
--- a/src/ArrayPractice.java
+++ b/src/ArrayPractice.java
@@ -1,17 +1,30 @@
 public class ArrayPractice {
   public static void main(String[] args) {
     // Create an array of Strings of size 4
+    String[] strings = new String[4];
 
     // Set the value of the array at each index to be a different String
     // It's OK to do this one-by-one
+    strings[0] = "Hello";
+    strings[1] = "What's up!";
+    strings[2] = "Greetings.";
+    strings[3] = "Howdy!";
 
     // Get the value of the array at index 2
+    System.out.println(strings[2]);
 
     // Get the length of the array
+    System.out.println(strings.length);
 
     // Iterate over the array using a traditional for loop and print out each item
+    for (int i = 0; i < strings.length; i++) {
+      System.out.println(strings[i]);
+    }
 
     // Iterate over the array using a for-each loop and print out each item
+    for (String x : strings) {
+      System.out.println(x);
+    }
 
     /*
      * Reminder!

From aad02e44e4abd4ea98416ca985dc45a136283599 Mon Sep 17 00:00:00 2001
From: AI <182692506+AhmedIhsan123@users.noreply.github.com>
Date: Sun, 28 Sep 2025 19:56:08 -0700
Subject: [PATCH 08/13] Finished first portion of tasks

---
 src/StringPractice.java | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/StringPractice.java b/src/StringPractice.java
index 8d87617..f3478d1 100644
--- a/src/StringPractice.java
+++ b/src/StringPractice.java
@@ -1,16 +1,24 @@
 public class StringPractice {
   public static void main(String[] args) {
     // Create a string with at least 5 characters and assign it to a variable
+    String myString = "Ahmed";
 
     // Find the length of the string
+    System.out.println("String Length: " + myString.length());
 
     // Concatenate (add) two strings together and reassign the result
+    myString = (myString + "Heythere!");
 
     // Find the value of the character at index 3
+    System.out.println("Value at index three: " + myString.charAt(3));
 
     // Check whether the string contains a given substring (i.e. does the string have "abc" in it?)
+    System.out.println("Contains Ahm?: " + myString.contains("Ahm"));
 
     // Iterate over the characters of the string, printing each one on a separate line
+    for (int i = 0; i < myString.length(); i++) {
+      System.out.println(myString.charAt(i));
+    }
 
     // Create an ArrayList of Strings and assign it to a variable
 

From 3ae5e06ccf8eb5a57fa8a2c1491975009094a8fc Mon Sep 17 00:00:00 2001
From: AI <182692506+AhmedIhsan123@users.noreply.github.com>
Date: Sun, 28 Sep 2025 20:05:38 -0700
Subject: [PATCH 09/13] Completed String Practice, stable.

---
 src/StringPractice.java | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/StringPractice.java b/src/StringPractice.java
index f3478d1..72da9fb 100644
--- a/src/StringPractice.java
+++ b/src/StringPractice.java
@@ -1,3 +1,5 @@
+import java.util.ArrayList;
+
 public class StringPractice {
   public static void main(String[] args) {
     // Create a string with at least 5 characters and assign it to a variable
@@ -21,13 +23,20 @@ public static void main(String[] args) {
     }
 
     // Create an ArrayList of Strings and assign it to a variable
+    ArrayList<String> myArray = new ArrayList<>();
 
     // Add multiple strings to the List (OK to do one-by-one)
+    myArray.add("Wuzzup");
+    myArray.add("Hello yo!");
+    myArray.add("I like cheese.");
 
     // Join all of the strings in the list together into a single string separated by commas
     // Use a built-in method to achieve this instead of using a loop
+    String test = String.join(", ", myArray);
+    System.out.println(test);
 
     // Check whether two strings are equal
+    System.out.println("They equal?: " + myArray.get(0).equals(myArray.get(1)));
 
     /*
      * Reminder!

From 40cc7e958d1c91b5d230706d11f82f5eb7df99cf Mon Sep 17 00:00:00 2001
From: AI <182692506+AhmedIhsan123@users.noreply.github.com>
Date: Sun, 28 Sep 2025 20:12:36 -0700
Subject: [PATCH 10/13] Completed Set Practice file, stable

---
 src/SetPractice.java | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/src/SetPractice.java b/src/SetPractice.java
index d2fc1c9..b21a7ad 100644
--- a/src/SetPractice.java
+++ b/src/SetPractice.java
@@ -1,17 +1,30 @@
+import java.util.HashSet;
+import java.util.Set;
+
 public class SetPractice {
   public static void main(String[] args) {
     // Create a HashSet of Strings and assign it to a variable of type Set
+    Set<String> myStrings = new HashSet<>();
 
     // Add 3 elements to the set
     // (It's OK to do it one-by-one)
+    myStrings.add("One");
+    myStrings.add("Two");
+    myStrings.add("Three");
 
     // Check whether the Set contains a given String
+    System.out.println(myStrings.contains("Two"));
 
     // Remove an element from the Set
+    myStrings.remove("Three");
 
     // Get the size of the Set
+    System.out.println(myStrings.size());
 
     // Iterate over the elements of the Set, printing each one on a separate line
+    for (String x : myStrings) {
+      System.out.println(x);
+    }
 
     /*
      * Warning!

From 3f9748355db303dfbf863e9807ae358aec7b8bc2 Mon Sep 17 00:00:00 2001
From: AI <182692506+AhmedIhsan123@users.noreply.github.com>
Date: Sun, 28 Sep 2025 20:33:54 -0700
Subject: [PATCH 11/13] complete practice map

---
 src/MapPractice.java | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/src/MapPractice.java b/src/MapPractice.java
index 7ebfeac..0252a4f 100644
--- a/src/MapPractice.java
+++ b/src/MapPractice.java
@@ -1,28 +1,47 @@
-
+import java.util.HashMap;
+import java.util.Map;
 
 public class MapPractice {
   public static void main(String[] args) {
     // Create a HashMap with String keys and Integer values and
     // assign it to a variable of type Map
+    Map<String, Integer> myMap = new HashMap<>(); 
 
     // Put 3 different key/value pairs in the Map
     // (it's OK to do this one-by-one)
+    myMap.put("One", 1);
+    myMap.put("Two", 2);
+    myMap.put("Three", 3);
 
     // Get the value associated with a given key in the Map
+    System.out.println(myMap.get("One"));
 
     // Find the size (number of key/value pairs) of the Map
+    System.out.println(myMap.size());
 
     // Replace the value associated with a given key (the size of the Map shoukld not change)
+    myMap.replace("One", 0);
 
     // Check whether the Map contains a given key
+    System.out.println("Contains Key One: " + myMap.containsKey("One"));
 
     // Check whether the Map contains a given value
+    System.out.println("Contains Value 1: " + myMap.containsValue(1));
 
     // Iterate over the keys of the Map, printing each key
+    for (String key : myMap.keySet()) {
+      System.out.println(key);
+    }
 
     // Iterate over the values of the map, printing each value
+    for (int value : myMap.values()) {
+      System.out.println(value);
+    }
 
     // Iterate over the entries in the map, printing each key and value
+    for (Map.Entry<String, Integer> entry : myMap.entrySet()) {
+      System.out.println("Key: " + entry.getKey() + ", Value: " + entry.getValue());
+    }
 
     /*
      * Usage tip!

From aa22956b4d8aad6e5622305dd9a8b9565e46b9f1 Mon Sep 17 00:00:00 2001
From: AI <182692506+AhmedIhsan123@users.noreply.github.com>
Date: Sun, 28 Sep 2025 20:42:27 -0700
Subject: [PATCH 12/13] Person class functionality added

---
 src/Person.java | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/src/Person.java b/src/Person.java
index 8ab3f95..5aac9b6 100644
--- a/src/Person.java
+++ b/src/Person.java
@@ -6,13 +6,22 @@
 public class Person {
   // Declare a public String instance variable for the name of the person
   // Declare a private int instance variable for the age of the person
-
+  public String name;
+  private int age;
 
   // Create a constructor that takes the name and age of the person
   // and assigns it to the instance variables
+  public Person(String name, int age) {
+    this.name = name;
+    this.age = age;
+  }
 
 
   // Create a toString method that gives the name and age of the person
+  @Override
+  public String toString () {
+    return name + " " + age;
+  }
 
 
   // Implement the below public instance method "birthYear"
@@ -28,10 +37,14 @@ public class Person {
    * @return The year the person was born
    */
   // (create the instance method here)
+  public int birthYear (int currentYear) {
+    return currentYear - age;
+  } 
 
 
   public static void main(String[] args) {
     // Create an instance of Person
+    
 
     // Create another instance of Person with a different name and age and
     // assign it to a different variable

From 1fbe65e1ef209d7830e4cac3a5d1ba98e743df6c Mon Sep 17 00:00:00 2001
From: AI <182692506+AhmedIhsan123@users.noreply.github.com>
Date: Sun, 28 Sep 2025 20:46:13 -0700
Subject: [PATCH 13/13] Completed Person file, stable.

---
 src/Person.java | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/Person.java b/src/Person.java
index 5aac9b6..b812d03 100644
--- a/src/Person.java
+++ b/src/Person.java
@@ -44,22 +44,28 @@ public int birthYear (int currentYear) {
 
   public static void main(String[] args) {
     // Create an instance of Person
-    
+    Person me = new Person("Ahmed", 18);
 
     // Create another instance of Person with a different name and age and
     // assign it to a different variable
+    Person friend = new Person("Amelia", 20);
 
     // Print the first person
+    System.out.println(me.name);
 
     // Print the second person
+    System.out.println(friend.name);
 
     // Get the name of the first person and store it in a local variable
+    String myName = me.name;
 
     // Using the birthYear method, get the birth year of the first person
     // and store it in a local variable. Input the actual current year (e.g. 2025)
     // as the argument.
+    int myYear = me.birthYear(2025);
 
     // In a separate statement, print the local variable holding the birth year.
+    System.out.println(myYear);
 
     /**
      * Terminology!