From 65a6427088c71e0c0dcf9540505037663dc3f50e Mon Sep 17 00:00:00 2001
From: Darien Arthur-Gocken
 <233949874+DarienArthur-Gocken@users.noreply.github.com>
Date: Thu, 25 Sep 2025 14:38:01 -0700
Subject: [PATCH 01/27] negative float

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

diff --git a/src/NumberPractice.java b/src/NumberPractice.java
index bbec2fe..7c25984 100644
--- a/src/NumberPractice.java
+++ b/src/NumberPractice.java
@@ -1,6 +1,8 @@
 public class NumberPractice {
   public static void main(String args[]) {
     // Create a float with a negative value and assign it to a variable
+    float negativeFloat = -1.5f;
+    //System.out.println(negativeFloat);
 
     // Create an int with a positive value and assign it to a variable
 

From 1c97eb2058904d5da539173b6843ffc89eac09c6 Mon Sep 17 00:00:00 2001
From: Darien Arthur-Gocken
 <233949874+DarienArthur-Gocken@users.noreply.github.com>
Date: Thu, 25 Sep 2025 14:38:52 -0700
Subject: [PATCH 02/27] positive int

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

diff --git a/src/NumberPractice.java b/src/NumberPractice.java
index 7c25984..be52e61 100644
--- a/src/NumberPractice.java
+++ b/src/NumberPractice.java
@@ -5,6 +5,8 @@ public static void main(String args[]) {
     //System.out.println(negativeFloat);
 
     // Create an int with a positive value and assign it to a variable
+    int positiveInt = 5;
+    //System.out.println(positiveInt);
 
     // Use the modulo % operator to find the remainder when the int is divided by 3
 

From ccbf171625dd471aa155df1af23c94dcd452ca8f Mon Sep 17 00:00:00 2001
From: Darien Arthur-Gocken
 <233949874+DarienArthur-Gocken@users.noreply.github.com>
Date: Thu, 25 Sep 2025 14:39:49 -0700
Subject: [PATCH 03/27] modulo remainder

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

diff --git a/src/NumberPractice.java b/src/NumberPractice.java
index be52e61..5170ca6 100644
--- a/src/NumberPractice.java
+++ b/src/NumberPractice.java
@@ -9,6 +9,8 @@ public static void main(String args[]) {
     //System.out.println(positiveInt);
 
     // Use the modulo % operator to find the remainder when the int is divided by 3
+    int remainder = positiveInt % 3;
+    //System.out.println(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)

From 7306a78f060730fe38f57149c444ac796874e81f Mon Sep 17 00:00:00 2001
From: Darien Arthur-Gocken
 <233949874+DarienArthur-Gocken@users.noreply.github.com>
Date: Thu, 25 Sep 2025 14:42:29 -0700
Subject: [PATCH 04/27] Even/Odd numbers.

---
 src/NumberPractice.java | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/NumberPractice.java b/src/NumberPractice.java
index 5170ca6..0aac4d9 100644
--- a/src/NumberPractice.java
+++ b/src/NumberPractice.java
@@ -16,6 +16,12 @@ 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.
+    int isEvenNumber = 1;
+    if(isEvenNumber % 2 == 0) {
+      System.out.println("Even");
+    } else {
+      System.out.println("Odd");
+    }
 
     // Divide the number by another number using integer division
 

From 4a00923e30e0d5ff251aa1746dbf00000d8b107e Mon Sep 17 00:00:00 2001
From: Darien Arthur-Gocken
 <233949874+DarienArthur-Gocken@users.noreply.github.com>
Date: Thu, 25 Sep 2025 14:43:32 -0700
Subject: [PATCH 05/27] Dividing ints

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

diff --git a/src/NumberPractice.java b/src/NumberPractice.java
index 0aac4d9..aeb9912 100644
--- a/src/NumberPractice.java
+++ b/src/NumberPractice.java
@@ -24,6 +24,10 @@ public static void main(String args[]) {
     }
 
     // Divide the number by another number using integer division
+    int number1 = 20;
+    int number2 = 10;
+    int result = number1 / number2;
+    System.out.println(result);
 
     /*
      * Reminder!

From 9ffe1cd5ef43ba8506ce3f6be9b19a64e9b74018 Mon Sep 17 00:00:00 2001
From: Darien Arthur-Gocken
 <233949874+DarienArthur-Gocken@users.noreply.github.com>
Date: Thu, 25 Sep 2025 14:45:08 -0700
Subject: [PATCH 06/27] Make arraylist

---
 src/ListPractice.java | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/ListPractice.java b/src/ListPractice.java
index f4de8e7..f78df42 100644
--- a/src/ListPractice.java
+++ b/src/ListPractice.java
@@ -1,8 +1,9 @@
+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> strings = new ArrayList<String>();
 
     // Add 3 elements to the list (OK to do one-by-one)
 

From 636ebda63efe888e9ec33b128e826d26f330c78f Mon Sep 17 00:00:00 2001
From: Darien Arthur-Gocken
 <233949874+DarienArthur-Gocken@users.noreply.github.com>
Date: Thu, 25 Sep 2025 14:46:23 -0700
Subject: [PATCH 07/27] adding elements to list

---
 src/ListPractice.java | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/ListPractice.java b/src/ListPractice.java
index f78df42..6909b32 100644
--- a/src/ListPractice.java
+++ b/src/ListPractice.java
@@ -6,8 +6,12 @@ public static void main(String[] args) {
     ArrayList<String> strings = new ArrayList<String>();
 
     // Add 3 elements to the list (OK to do one-by-one)
+    strings.add("Hey");
+    strings.add("hey2");
+    strings.add("whats up");
 
     // Print the element at index 1
+    System.out.println(strings.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)

From 8f1efd304216643c3808d8781b16cdaca50551e0 Mon Sep 17 00:00:00 2001
From: Darien Arthur-Gocken
 <233949874+DarienArthur-Gocken@users.noreply.github.com>
Date: Thu, 25 Sep 2025 14:48:07 -0700
Subject: [PATCH 08/27] setting at specific indexes

---
 src/ListPractice.java | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/ListPractice.java b/src/ListPractice.java
index 6909b32..88f51e9 100644
--- a/src/ListPractice.java
+++ b/src/ListPractice.java
@@ -15,8 +15,13 @@ public static void main(String[] args) {
 
     // Replace the element at index 1 with a new value
     // (Do not insert a new value. The length of the list should not change)
+    strings.set(1, "new value");
+    System.out.println(strings.get(1));
 
     // Insert a new element at index 0 (the length of the list will change)
+    strings.add(0, "even newer value");
+    System.out.println(strings.get(0));
+
 
     // Check whether the list contains a certain string
 

From b644faf2727942bd06e8c74a7cc7820c90eb9d63 Mon Sep 17 00:00:00 2001
From: Darien Arthur-Gocken
 <233949874+DarienArthur-Gocken@users.noreply.github.com>
Date: Thu, 25 Sep 2025 14:50:19 -0700
Subject: [PATCH 09/27] Check for specific string

---
 src/ListPractice.java | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/ListPractice.java b/src/ListPractice.java
index 88f51e9..fee70cb 100644
--- a/src/ListPractice.java
+++ b/src/ListPractice.java
@@ -24,6 +24,11 @@ public static void main(String[] args) {
 
 
     // Check whether the list contains a certain string
+    if(strings.indexOf("new value") >= 0) {
+      System.out.println("Found.");
+    } else {
+      System.out.println("Not found.");
+    }
 
     // Iterate over the list using a traditional for-loop.
     // Print each index and value on a separate line

From 8e0d8ced8d09d324b824bc510244be18ba77231a Mon Sep 17 00:00:00 2001
From: Darien Arthur-Gocken
 <233949874+DarienArthur-Gocken@users.noreply.github.com>
Date: Thu, 25 Sep 2025 14:53:37 -0700
Subject: [PATCH 10/27] Iterate over list

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

diff --git a/src/ListPractice.java b/src/ListPractice.java
index fee70cb..fa0ebce 100644
--- a/src/ListPractice.java
+++ b/src/ListPractice.java
@@ -32,6 +32,9 @@ public static void main(String[] args) {
 
     // Iterate over the list using a traditional for-loop.
     // Print each index and value on a separate line
+    for(int i = 0; i < strings.size(); i++) {
+      System.out.println(i + strings.get(i));
+    }
 
     // Sort the list using the Collections library
 

From 6bbf3275c74f648280b1994f4f67f6718e981f85 Mon Sep 17 00:00:00 2001
From: Darien Arthur-Gocken
 <233949874+DarienArthur-Gocken@users.noreply.github.com>
Date: Thu, 25 Sep 2025 20:54:09 -0700
Subject: [PATCH 11/27] sort & iterate foreach

---
 src/ListPractice.java | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/ListPractice.java b/src/ListPractice.java
index fa0ebce..cfe024e 100644
--- a/src/ListPractice.java
+++ b/src/ListPractice.java
@@ -1,4 +1,5 @@
 import java.util.ArrayList;
+import java.util.Collections;
 public class ListPractice {
 
   public static void main(String[] args) {
@@ -37,9 +38,13 @@ public static void main(String[] args) {
     }
 
     // Sort the list using the Collections library
+    Collections.sort(strings);
 
     // Iterate over the list using a for-each loop
     // Print each value on a second line
+    for(String str : strings) {
+      System.out.println(str);
+    }
 
     /*
      * Usage tip!

From cbdad62cb36f905239f86b4fb20f572f3f69503a Mon Sep 17 00:00:00 2001
From: Darien Arthur-Gocken
 <233949874+DarienArthur-Gocken@users.noreply.github.com>
Date: Thu, 25 Sep 2025 20:56:09 -0700
Subject: [PATCH 12/27] make new strings array

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

diff --git a/src/ArrayPractice.java b/src/ArrayPractice.java
index bc58c83..d9be09a 100644
--- a/src/ArrayPractice.java
+++ b/src/ArrayPractice.java
@@ -1,6 +1,7 @@
 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

From da854224e0d66d00554c4201213e8b9ce535fca1 Mon Sep 17 00:00:00 2001
From: Darien Arthur-Gocken
 <233949874+DarienArthur-Gocken@users.noreply.github.com>
Date: Thu, 25 Sep 2025 20:59:45 -0700
Subject: [PATCH 13/27] string values set and checked.

---
 src/ArrayPractice.java | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/ArrayPractice.java b/src/ArrayPractice.java
index d9be09a..71bb116 100644
--- a/src/ArrayPractice.java
+++ b/src/ArrayPractice.java
@@ -5,8 +5,13 @@ public static void main(String[] args) {
 
     // 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] = "Hey";
+    strings[1] = "Test";
+    strings[2] = "Third";
+    strings[3] = "Fourth";
 
     // Get the value of the array at index 2
+    System.out.println(strings[2]);
 
     // Get the length of the array
 

From 5a6f52cce001a1b42850120a363d5c4d51f1d596 Mon Sep 17 00:00:00 2001
From: Darien Arthur-Gocken
 <233949874+DarienArthur-Gocken@users.noreply.github.com>
Date: Thu, 25 Sep 2025 21:00:38 -0700
Subject: [PATCH 14/27] print array length

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

diff --git a/src/ArrayPractice.java b/src/ArrayPractice.java
index 71bb116..b7cc525 100644
--- a/src/ArrayPractice.java
+++ b/src/ArrayPractice.java
@@ -14,6 +14,7 @@ public static void main(String[] args) {
     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
 

From ca720b58041608b506ea3ea4895e5955bf0edb54 Mon Sep 17 00:00:00 2001
From: Darien Arthur-Gocken
 <233949874+DarienArthur-Gocken@users.noreply.github.com>
Date: Thu, 25 Sep 2025 21:02:58 -0700
Subject: [PATCH 15/27] iterate array loops

---
 src/ArrayPractice.java | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/ArrayPractice.java b/src/ArrayPractice.java
index b7cc525..926e244 100644
--- a/src/ArrayPractice.java
+++ b/src/ArrayPractice.java
@@ -17,8 +17,14 @@ public static void main(String[] args) {
     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 str : strings) {
+      System.out.println(str);
+    }
 
     /*
      * Reminder!

From 3ca8cc645e22e83d64b37477738c39bfabd16bf1 Mon Sep 17 00:00:00 2001
From: Darien Arthur-Gocken
 <233949874+DarienArthur-Gocken@users.noreply.github.com>
Date: Thu, 25 Sep 2025 21:05:26 -0700
Subject: [PATCH 16/27] string init & length

---
 src/StringPractice.java | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/StringPractice.java b/src/StringPractice.java
index 8d87617..00e6de9 100644
--- a/src/StringPractice.java
+++ b/src/StringPractice.java
@@ -1,8 +1,10 @@
 public class StringPractice {
   public static void main(String[] args) {
     // Create a string with at least 5 characters and assign it to a variable
+    String fiveCharacterString = "Tests";
 
     // Find the length of the string
+    System.out.println(fiveCharacterString.length());
 
     // Concatenate (add) two strings together and reassign the result
 

From 6ed3c5db220f5b57ec749081ad80fc1e7bf04df6 Mon Sep 17 00:00:00 2001
From: Darien Arthur-Gocken
 <233949874+DarienArthur-Gocken@users.noreply.github.com>
Date: Thu, 25 Sep 2025 21:10:31 -0700
Subject: [PATCH 17/27] concat strings & find value of char

---
 src/StringPractice.java | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/StringPractice.java b/src/StringPractice.java
index 00e6de9..6ab7f8e 100644
--- a/src/StringPractice.java
+++ b/src/StringPractice.java
@@ -7,8 +7,13 @@ public static void main(String[] args) {
     System.out.println(fiveCharacterString.length());
 
     // Concatenate (add) two strings together and reassign the result
+    String stringOne = "String1";
+    String stringTwo = "String2";
+    stringOne = stringOne.concat(stringTwo);
+    System.out.println(stringOne);
 
     // Find the value of the character at index 3
+    System.out.println(fiveCharacterString.charAt(3));
 
     // Check whether the string contains a given substring (i.e. does the string have "abc" in it?)
 

From ecfc8db07e25df1510355e03b60a9cbef48ac081 Mon Sep 17 00:00:00 2001
From: Darien Arthur-Gocken
 <233949874+DarienArthur-Gocken@users.noreply.github.com>
Date: Thu, 25 Sep 2025 21:16:50 -0700
Subject: [PATCH 18/27] check contains, check each char in string, new
 arraylist

---
 src/StringPractice.java | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/StringPractice.java b/src/StringPractice.java
index 6ab7f8e..a3a8aa9 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
@@ -16,10 +18,15 @@ public static void main(String[] args) {
     System.out.println(fiveCharacterString.charAt(3));
 
     // Check whether the string contains a given substring (i.e. does the string have "abc" in it?)
+    System.out.println(fiveCharacterString.contains("abc"));
 
     // Iterate over the characters of the string, printing each one on a separate line
+    for (int i = 0; i < fiveCharacterString.length(); i++) {
+      System.out.print(fiveCharacterString.charAt(i) + " ");
+    }
 
     // Create an ArrayList of Strings and assign it to a variable
+    ArrayList<String> arrayOfStrings = new ArrayList<String>();
 
     // Add multiple strings to the List (OK to do one-by-one)
 

From fe71163867837fe49fdf98b869f8ca77dc426865 Mon Sep 17 00:00:00 2001
From: Darien Arthur-Gocken
 <233949874+DarienArthur-Gocken@users.noreply.github.com>
Date: Thu, 25 Sep 2025 21:20:36 -0700
Subject: [PATCH 19/27] adding to array, tostring, checking equals.

---
 src/StringPractice.java | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/src/StringPractice.java b/src/StringPractice.java
index a3a8aa9..b8870af 100644
--- a/src/StringPractice.java
+++ b/src/StringPractice.java
@@ -22,18 +22,27 @@ public static void main(String[] args) {
 
     // Iterate over the characters of the string, printing each one on a separate line
     for (int i = 0; i < fiveCharacterString.length(); i++) {
-      System.out.print(fiveCharacterString.charAt(i) + " ");
+      System.out.println(fiveCharacterString.charAt(i) + " ");
     }
 
     // Create an ArrayList of Strings and assign it to a variable
     ArrayList<String> arrayOfStrings = new ArrayList<String>();
 
     // Add multiple strings to the List (OK to do one-by-one)
+    arrayOfStrings.add("string1");
+    arrayOfStrings.add("string2");
+    arrayOfStrings.add("String3");
 
     // 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
+    System.out.println(arrayOfStrings.toString());
 
     // Check whether two strings are equal
+    if(stringOne.equals(stringTwo)) {
+      System.out.println("equal");
+    } else {
+      System.out.println("Not equal.");
+    }
 
     /*
      * Reminder!

From 61bbd154d3bdac7d0be82bcbd61225b76bb43f8d Mon Sep 17 00:00:00 2001
From: Darien Arthur-Gocken
 <233949874+DarienArthur-Gocken@users.noreply.github.com>
Date: Thu, 25 Sep 2025 21:23:07 -0700
Subject: [PATCH 20/27] init hashset, add elements

---
 src/SetPractice.java | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/SetPractice.java b/src/SetPractice.java
index d2fc1c9..8a289b1 100644
--- a/src/SetPractice.java
+++ b/src/SetPractice.java
@@ -1,9 +1,15 @@
+import java.util.HashSet;
+
 public class SetPractice {
   public static void main(String[] args) {
     // Create a HashSet of Strings and assign it to a variable of type Set
+    HashSet<String> hashStrings = new HashSet<>();
 
     // Add 3 elements to the set
     // (It's OK to do it one-by-one)
+    hashStrings.add("test1");
+    hashStrings.add("test2");
+    hashStrings.add("test3");
 
     // Check whether the Set contains a given String
 

From a485bb2fb4f0b247ca87aa8e2ac5acb4be0aca56 Mon Sep 17 00:00:00 2001
From: Darien Arthur-Gocken
 <233949874+DarienArthur-Gocken@users.noreply.github.com>
Date: Thu, 25 Sep 2025 21:28:13 -0700
Subject: [PATCH 21/27] hashset contains, remove, size

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

diff --git a/src/SetPractice.java b/src/SetPractice.java
index 8a289b1..910ff2a 100644
--- a/src/SetPractice.java
+++ b/src/SetPractice.java
@@ -12,10 +12,13 @@ public static void main(String[] args) {
     hashStrings.add("test3");
 
     // Check whether the Set contains a given String
+    System.out.println(hashStrings.contains("test1"));
 
     // Remove an element from the Set
+    hashStrings.remove("test3");
 
     // Get the size of the Set
+    System.out.println(hashStrings.size());
 
     // Iterate over the elements of the Set, printing each one on a separate line
 

From edc69f42913f52c38007f4cdaec451f37e07b017 Mon Sep 17 00:00:00 2001
From: Darien Arthur-Gocken
 <233949874+DarienArthur-Gocken@users.noreply.github.com>
Date: Thu, 25 Sep 2025 21:29:23 -0700
Subject: [PATCH 22/27] iterate over set

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

diff --git a/src/SetPractice.java b/src/SetPractice.java
index 910ff2a..7d75e65 100644
--- a/src/SetPractice.java
+++ b/src/SetPractice.java
@@ -21,6 +21,9 @@ public static void main(String[] args) {
     System.out.println(hashStrings.size());
 
     // Iterate over the elements of the Set, printing each one on a separate line
+    for(String str : hashStrings) {
+      System.out.println(str);
+    }
 
     /*
      * Warning!

From fb033e8e74ff3b6553f9d569752a9418ae93aa23 Mon Sep 17 00:00:00 2001
From: Darien Arthur-Gocken
 <233949874+DarienArthur-Gocken@users.noreply.github.com>
Date: Thu, 25 Sep 2025 21:31:49 -0700
Subject: [PATCH 23/27] init hashmap and fill

---
 src/MapPractice.java | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/MapPractice.java b/src/MapPractice.java
index 7ebfeac..aec247c 100644
--- a/src/MapPractice.java
+++ b/src/MapPractice.java
@@ -1,12 +1,16 @@
-
+import java.util.HashMap;
 
 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
+    HashMap<String, Integer> strIntHashMap = new HashMap<>();
 
     // Put 3 different key/value pairs in the Map
     // (it's OK to do this one-by-one)
+    strIntHashMap.put("test1", 1);
+    strIntHashMap.put("test2", 2);
+    strIntHashMap.put("test3", 3);
 
     // Get the value associated with a given key in the Map
 

From 2b271d5a10e9873a3f413e2f62ff87ed40457b0b Mon Sep 17 00:00:00 2001
From: Darien Arthur-Gocken
 <233949874+DarienArthur-Gocken@users.noreply.github.com>
Date: Thu, 25 Sep 2025 21:39:09 -0700
Subject: [PATCH 24/27] get value, size, replace, and check contains

---
 src/MapPractice.java | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/MapPractice.java b/src/MapPractice.java
index aec247c..99916ec 100644
--- a/src/MapPractice.java
+++ b/src/MapPractice.java
@@ -13,14 +13,20 @@ public static void main(String[] args) {
     strIntHashMap.put("test3", 3);
 
     // Get the value associated with a given key in the Map
+    System.out.println(strIntHashMap.get("test2"));
 
     // Find the size (number of key/value pairs) of the Map
+    System.out.println(strIntHashMap.size());
 
     // Replace the value associated with a given key (the size of the Map shoukld not change)
+    strIntHashMap.replace("test2", 4);
+    System.out.println(strIntHashMap.size());
 
     // Check whether the Map contains a given key
+    System.out.println(strIntHashMap.containsKey("test1"));
 
     // Check whether the Map contains a given value
+    System.out.println(strIntHashMap.containsValue(2));
 
     // Iterate over the keys of the Map, printing each key
 

From b59de3fe1eed2992ec6aa2d4acf2820a9501cc86 Mon Sep 17 00:00:00 2001
From: Darien Arthur-Gocken
 <233949874+DarienArthur-Gocken@users.noreply.github.com>
Date: Thu, 25 Sep 2025 21:45:08 -0700
Subject: [PATCH 25/27] iterating over hashmap

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

diff --git a/src/MapPractice.java b/src/MapPractice.java
index 99916ec..7afb85c 100644
--- a/src/MapPractice.java
+++ b/src/MapPractice.java
@@ -29,10 +29,19 @@ public static void main(String[] args) {
     System.out.println(strIntHashMap.containsValue(2));
 
     // Iterate over the keys of the Map, printing each key
+    for(String key : strIntHashMap.keySet()) {
+      System.out.println(key);
+    }
 
     // Iterate over the values of the map, printing each value
+    for(Integer value : strIntHashMap.values()) {
+      System.out.println(value);
+    }
 
     // Iterate over the entries in the map, printing each key and value
+    for(HashMap.Entry<String, Integer> entry : strIntHashMap.entrySet()) {
+      System.out.println(entry.getKey() + " - " + entry.getValue());
+    }
 
     /*
      * Usage tip!

From c44bd3bc0f8475b3a218dc35e72a7f1763adba9e Mon Sep 17 00:00:00 2001
From: Darien Arthur-Gocken
 <233949874+DarienArthur-Gocken@users.noreply.github.com>
Date: Thu, 25 Sep 2025 21:49:50 -0700
Subject: [PATCH 26/27] Person class impl

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

diff --git a/src/Person.java b/src/Person.java
index 8ab3f95..16a7f04 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) {
+      age = _age;
+      name = _name;
+  }
 
 
   // Create a toString method that gives the name and age of the person
+  public String toString() {
+    return name + " - " + age;
+  }
 
 
   // Implement the below public instance method "birthYear"
@@ -28,6 +37,10 @@ public class Person {
    * @return The year the person was born
    */
   // (create the instance method here)
+  public int birthYear(int currentYear) {
+    int bornOn = currentYear - age;
+    return bornOn;
+  }
 
 
   public static void main(String[] args) {

From 087de3e277278946a78c538ab6d406a5f8eee97d Mon Sep 17 00:00:00 2001
From: Darien Arthur-Gocken
 <233949874+DarienArthur-Gocken@users.noreply.github.com>
Date: Thu, 25 Sep 2025 21:52:03 -0700
Subject: [PATCH 27/27] main impl

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

diff --git a/src/Person.java b/src/Person.java
index 16a7f04..1f6e26c 100644
--- a/src/Person.java
+++ b/src/Person.java
@@ -45,21 +45,28 @@ public int birthYear(int currentYear) {
 
   public static void main(String[] args) {
     // Create an instance of Person
+    Person person = new Person("Person1", 20);
 
     // Create another instance of Person with a different name and age and
     // assign it to a different variable
+    Person person2 = new Person("Person2", 25);
 
     // Print the first person
+    System.out.println(person);
 
     // Print the second person
+    System.out.println(person2);
 
     // Get the name of the first person and store it in a local variable
+    String firstPersonName = person.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 bornOn = person.birthYear(2025);
 
     // In a separate statement, print the local variable holding the birth year.
+    System.out.println(bornOn);
 
     /**
      * Terminology!