From 32dd7d3494747464f68472849fe0e692ee87f180 Mon Sep 17 00:00:00 2001
From: "Andrei Jiroh Halili (STI College Meycauayan)"
 <halili.459491@meycauayan.sti.edu.ph>
Date: Tue, 20 Oct 2026 08:30:08 +0800
Subject: [PATCH] iykyk another output another commit

OOOOOOOOOOOOOHHHHHHH DIIIIIIIIIIIIIIIIIIIIIIIIIIIP!!! (IYKYK Verplexism)

Signed-off-by: Andrei Jiroh Halili (STI College Meycauayan) <halili.459491@meycauayan.sti.edu.ph>
---
 .../projects/dsaLabs/HashMapLab.java          | 24 ++++++
 .../projects/dsaLabs/StudentDirectory.java    | 84 +++++++++++++++++++
 2 files changed, 108 insertions(+)
 create mode 100644 java/src/dev/andreijiroh/studentops/projects/dsaLabs/HashMapLab.java
 create mode 100644 java/src/dev/andreijiroh/studentops/projects/dsaLabs/StudentDirectory.java

diff --git a/java/src/dev/andreijiroh/studentops/projects/dsaLabs/HashMapLab.java b/java/src/dev/andreijiroh/studentops/projects/dsaLabs/HashMapLab.java
new file mode 100644
index 0000000..aee34ca
--- /dev/null
+++ b/java/src/dev/andreijiroh/studentops/projects/dsaLabs/HashMapLab.java
@@ -0,0 +1,24 @@
+package dev.andreijiroh.studentops.projects.dsaLabs;
+import java.util.HashMap;
+
+public class HashMapLab {
+  public static void main(String[] args) {
+    HashMap<String, Integer> hashTable = new HashMap<>();
+
+    hashTable.put("apple", 10);
+    hashTable.put("banana", 20);
+    hashTable.put("grape", 30);
+    
+    System.out.println("apple: " + hashTable.get("apple"));
+    System.out.println("banana: " + hashTable.get("banana"));
+    
+    if (hashTable.containsKey("cherry")) {
+      System.out.println("cherry: " + hashTable.get("cherry"));
+    } else {
+      System.out.println("cherry not found!");
+    }
+
+    hashTable.remove("grape");
+    System.out.println("Hash table contents: " + hashTable);
+  }
+}
\ No newline at end of file
diff --git a/java/src/dev/andreijiroh/studentops/projects/dsaLabs/StudentDirectory.java b/java/src/dev/andreijiroh/studentops/projects/dsaLabs/StudentDirectory.java
new file mode 100644
index 0000000..a3b986a
--- /dev/null
+++ b/java/src/dev/andreijiroh/studentops/projects/dsaLabs/StudentDirectory.java
@@ -0,0 +1,84 @@
+package dev.andreijiroh.studentops.projects.dsaLabs;
+import java.util.HashMap;
+import java.util.Scanner;
+
+/**
+ * 05 Laboratory Exercise 1 - Data Structures and Algorithms
+ * 
+ * @author Andrei Jiroh Halili (STI College Meycauayan) <halili.459491@meycauayan.sti.edu.ph>
+ * @see https://gitlab.com/andreijiroh-dev/labs/studentops-codelab/-/blob/main/java/src/dev/andreijiroh/studentops/projects/dsaLabs/StudentDirectory.java
+ */
+public class StudentDirectory {
+  public static void main(String[] args) {
+    Scanner input = new Scanner(System.in);
+    HashMap<String, String> studentList = new HashMap<>();
+
+    System.out.print("Enter number of students: ");
+    Integer n = input.nextInt();
+    input.nextLine();
+
+    for (int i = 0; i < n; i++) {
+      System.out.print("Enter student number: ");
+      String studNum = input.nextLine();
+
+      System.out.print("Enter student name: ");
+      String studName = input.nextLine();
+
+      studentList.put(studNum, studName);
+    }
+
+    System.out.println("Student directory: " + studentList);
+
+    do {
+      System.out.println("Choose an operation:\n1 - Search, 2 - Remove 3 - Add/Update, 4 - Exit");
+      System.out.print("Enter your choice: ");
+      Integer choice = input.nextInt();
+      input.nextLine();
+
+      switch (choice) {
+        case 1:
+          System.out.print("Enter student number to search: ");
+          String searchNum = input.nextLine();
+
+          if (studentList.containsKey(searchNum)) {
+            System.out.println("Student name: "+ studentList.get(searchNum));
+          } else {
+            System.out.println("No record found with that student ID");
+          }
+          break;
+        case 2:
+          System.out.print("Enter student number to search: ");
+          String removeNum = input.nextLine();
+
+          if (studentList.containsKey(removeNum)) {
+            System.out.println("Removed student "+ studentList.get(removeNum));
+            studentList.remove(removeNum);
+            System.out.println("Updated student directory: " + studentList);
+          } else {
+            System.out.println("No record found with that student ID");
+          }
+          break;
+        case 3:
+          System.out.print("Enter student number to add or update: ");
+          String newNum = input.nextLine();
+          System.out.print("Student name: ");
+          String newName = input.nextLine();
+
+          if (studentList.containsKey(newNum)) {
+            studentList.replace(newNum, newName);
+            System.out.println("Existing record found. Updated existing entry");
+          } else {
+            studentList.putIfAbsent(newNum, newName);
+            System.out.println("No existing record found. Added new entry");
+          }
+          System.out.println("Updated student directory: " + studentList);
+          break;
+        case 4:
+          input.close();
+          System.exit(0);
+        default:
+          System.out.println("Unsupported choice selection");
+      }
+    } while (true);
+  }
+}
-- 
2.54.0