complete

src/main/java/dev/Main.java

@@ -33,32 +33,29 @@ public class Main {
 
                     List<String> data = FileManager.loadStudents("students.txt");
 
-                    // TODO:
+                    int total = data.size();
+                    int partSize = total / 3;
+                    int rem = total % 3;
 
-                    // Split data into 3 parts
+                    int end1 = partSize + (rem > 0 ? 1 : 0);
+                    int end2 = end1 + partSize + (rem > 1 ? 1 : 0);
 
-                    List<String> part1 = null;
+                    List<String> p1 = data.subList(0, end1);
+                    List<String> p2 = data.subList(end1, end2);
+                    List<String> p3 = data.subList(end2, total);
 
-                    List<String> part2 = null;
+                    StudentLoader t1 = new StudentLoader(p1);
+                    StudentLoader t2 = new StudentLoader(p2);
+                    StudentLoader t3 = new StudentLoader(p3);
 
-                    List<String> part3 = null;
+                    t1.start(); t2.start(); t3.start();
+                    t1.join();  t2.join();  t3.join();
 
-                    // TODO:
-
-                    StudentLoader t1 = null;
-
-                    StudentLoader t2 = null;
-
-                    StudentLoader t3 = null;
-
-                    // TODO:
-
-                    // start()
-
-                    // join()
-
-                    // merge results
+                    manager.addStudents(t1.getStudents());
+                    manager.addStudents(t2.getStudents());
+                    manager.addStudents(t3.getStudents());
 
+                    System.out.println("Students loaded.");
                 }
 
                 case 2 -> {

src/main/java/dev/model/Student.java

@@ -40,31 +40,15 @@ public class Student {
 
     @Override
     public int hashCode() {
-
-        // TODO:
-        // Return custom hash
-
-        // Example:
-        // return id % 97;
-
-        return 0;
+        return id % 97;
     }
 
     @Override
     public boolean equals(Object obj) {
-
-        // TODO:
-
-        // Step 1:
-        // Check null
-
-        // Step 2:
-        // Convert obj to Student
-
-        // Step 3:
-        // Compare IDs
-
-        return false;
+        if (this == obj) return true;
+        if (obj == null || getClass() != obj.getClass()) return false;
+        Student other = (Student) obj;
+        return this.id == other.id;
     }
 
     @Override

src/main/java/dev/service/StudentManager.java

@@ -10,36 +10,18 @@ public class StudentManager {
     private final ArrayList<Student> students = new ArrayList<>();
 
     public void addStudents(ArrayList<Student> newStudents) {
-
-        // TODO:
-
-        // Merge students
-
-        // Hint:
-        // addAll()
-
+        students.addAll(newStudents);
     }
 
     public Student searchStudent(int id) {
-
-        // TODO:
-
-        // Loop through students
-
-        // Compare IDs
-
+        for (Student s : students) {
+            if (s.getId() == id) return s;
+        }
         return null;
     }
 
     public boolean removeStudent(int id) {
-
-        // TODO:
-
-        // Find student
-
-        // Remove student
-
-        return false;
+        return students.removeIf(s -> s.getId() == id);
     }
 
     public void printStudents() {

src/main/java/dev/thread/StudentLoader.java

@@ -9,11 +9,11 @@ import java.util.List;
 
 public class StudentLoader extends Thread {
 
-    // Assigned file lines
+
 
     private final List<String> lines;
 
-    // Local student storage
+
 
     private final ArrayList<Student> students = new ArrayList<>();
 
@@ -24,29 +24,13 @@ public class StudentLoader extends Thread {
 
     @Override
     public void run() {
-
-        // TODO:
-
-        /*
-        Example line:
-
-        1001,Aryan,Computer Science,3.7
-         */
-
         for (String line : lines) {
-
-            // TODO:
-            // split line
-
-            // TODO:
-            // read values
-
-            // TODO:
-            // create Student
-
-            // TODO:
-            // add to students list
-
+            String[] parts = line.split(",");
+            int id = Integer.parseInt(parts[0]);
+            String name = parts[1];
+            String major = parts[2];
+            double gpa = Double.parseDouble(parts[3]);
+            students.add(new Student(id, name, major, gpa));
         }
 
     }

src/main/java/dev/utils/FileManager.java

@@ -11,22 +11,14 @@ public class FileManager {
     public static List<String> loadStudents(String path) throws Exception {
 
         List<String> lines = new ArrayList<>();
-
         BufferedReader reader = new BufferedReader(new FileReader(path));
 
         String line;
-
         while ((line = reader.readLine()) != null) {
-
-            // TODO:
-
-            // Add line to list
-
+            lines.add(line);
         }
 
         reader.close();
-
         return lines;
     }
-
 }