From b7662aa4af6fdef31b7836333dc2db100d403c20 Mon Sep 17 00:00:00 2001
From: Zahra Gharagozloo Mazlaghan <z.gharagozloo.m@gmail.com>
Date: Wed, 10 Jun 2026 22:52:02 +0330
Subject: [PATCH] Check and debug completed.

---
 src/main/java/dev/Main.java | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/src/main/java/dev/Main.java b/src/main/java/dev/Main.java
index 5cbdbf9..c5d94e3 100644
--- a/src/main/java/dev/Main.java
+++ b/src/main/java/dev/Main.java
@@ -4,6 +4,7 @@ import dev.service.StudentManager;
 import dev.thread.StudentLoader;
 import dev.utils.FileManager;
 
+import java.util.ArrayList;
 import java.util.List;
 import java.util.Scanner;
 
@@ -33,9 +34,9 @@ public class Main {
 
                     List<String> data = FileManager.loadStudents("students.txt");
 
-                    List<String> part1 = null;
-                    List<String> part2 = null;
-                    List<String> part3 = null;
+                    ArrayList<String> part1 = new ArrayList<>();
+                    ArrayList<String> part2 = new ArrayList<>();
+                    ArrayList<String> part3 = new ArrayList<>();
 
                     for(int i=0; i<data.size(); i++) {
                         if (i%3 == 0) {
@@ -47,9 +48,9 @@ public class Main {
                         }
                     }
 
-                    StudentLoader t1 = null;
-                    StudentLoader t2 = null;
-                    StudentLoader t3 = null;
+                    StudentLoader t1 = new StudentLoader(part1);
+                    StudentLoader t2 = new StudentLoader(part2);
+                    StudentLoader t3 = new StudentLoader(part3);
 
                     t1.start();
                     t2.start();
@@ -62,6 +63,8 @@ public class Main {
                     manager.addStudents(t1.getStudents());
                     manager.addStudents(t2.getStudents());
                     manager.addStudents(t3.getStudents());
+
+                    System.out.println("Students loaded successfully.");
                 }
 
                 case 2 -> {