WS-7

.idea/.gitignore

@@ -0,0 +1,10 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Ignored default folder with query files
+/queries/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

.idea/compiler.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CompilerConfiguration">
+    <annotationProcessing>
+      <profile name="Maven default annotation processors profile" enabled="true">
+        <sourceOutputDir name="target/generated-sources/annotations" />
+        <sourceTestOutputDir name="target/generated-test-sources/test-annotations" />
+        <outputRelativeToContentRoot value="true" />
+        <module name="WS-07-Multithreading-Basics-and-Hashing" />
+      </profile>
+    </annotationProcessing>
+  </component>
+</project>

.idea/encodings.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Encoding">
+    <file url="file://$PROJECT_DIR$/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/src/main/resources" charset="UTF-8" />
+  </component>
+</project>

.idea/jarRepositories.xml

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="RemoteRepositoriesConfiguration">
+    <remote-repository>
+      <option name="id" value="central" />
+      <option name="name" value="Central Repository" />
+      <option name="url" value="https://repo.maven.apache.org/maven2" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="central" />
+      <option name="name" value="Maven Central repository" />
+      <option name="url" value="https://repo1.maven.org/maven2" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="jboss.community" />
+      <option name="name" value="JBoss Community repository" />
+      <option name="url" value="https://repository.jboss.org/nexus/content/repositories/public/" />
+    </remote-repository>
+  </component>
+</project>

.idea/misc.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ExternalStorageConfigurationManager" enabled="true" />
+  <component name="MavenProjectsManager">
+    <option name="originalFiles">
+      <list>
+        <option value="$PROJECT_DIR$/pom.xml" />
+      </list>
+    </option>
+  </component>
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_25" default="true" project-jdk-name="ms-25" project-jdk-type="JavaSDK" />
+</project>

.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>

src/main/java/dev/Main.java

@@ -8,92 +8,70 @@ import java.util.List;
 import java.util.Scanner;
 
 public class Main {
-
     public static void main(String[] args) throws Exception {
-
         Scanner scanner = new Scanner(System.in);
-
         StudentManager manager = new StudentManager();
 
         while (true) {
-
             System.out.println("""
                     1.Load students
                     2.Search student
                     3.Remove student
                     4.Print students
-                    5.Exit
+                    5.Exit""");
-                    """);
 
             int choice = scanner.nextInt();
 
             switch (choice) {
-
                 case 1 -> {
-
                     List<String> data = FileManager.loadStudents("students.txt");
 
-                    // TODO:
+                    int size = data.size();
+                    int part1Size = size / 3;
+                    int part2Size = 2 * size / 3;
 
-                    // Split data into 3 parts
+                    List<String> part1 = data.subList(0, part1Size);
+                    List<String> part2 = data.subList(part1Size, part2Size);
+                    List<String> part3 = data.subList(part2Size, size);
 
-                    List<String> part1 = null;
+                    StudentLoader t1 = new StudentLoader(part1);
+                    StudentLoader t2 = new StudentLoader(part2);
+                    StudentLoader t3 = new StudentLoader(part3);
 
-                    List<String> part2 = null;
+                    t1.start();
+                    t2.start();
+                    t3.start();
 
-                    List<String> part3 = null;
+                    t1.join();
+                    t2.join();
+                    t3.join();
 
-                    // TODO:
+                    manager.addStudents(t1.getStudents());
-
+                    manager.addStudents(t2.getStudents());
-                    StudentLoader t1 = null;
+                    manager.addStudents(t3.getStudents());
-
-                    StudentLoader t2 = null;
-
-                    StudentLoader t3 = null;
-
-                    // TODO:
-
-                    // start()
-
-                    // join()
-
-                    // merge results
 
+                    System.out.println("Students loaded successfully.");
                 }
 
                 case 2 -> {
-
                     System.out.print("ID: ");
-
                     int id = scanner.nextInt();
-
                     System.out.println(manager.searchStudent(id));
-
                 }
 
                 case 3 -> {
-
                     System.out.print("ID: ");
-
                     int id = scanner.nextInt();
-
                     boolean removed = manager.removeStudent(id);
-
                     System.out.println(removed);
-
                 }
 
-                case 4 ->
+                case 4 -> manager.printStudents();
-                        manager.printStudents();
 
                 case 5 -> {
                     return;
                 }
-
             }
-
         }
-
     }
-
 }

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

@@ -1,21 +1,12 @@
 package dev.model;
 
 public class Student {
-
     private final int id;
-
     private final String name;
-
     private final String major;
-
     private final double gpa;
 
-    public Student(
+    public Student(int id, String name, String major, double gpa) {
-            int id,
-            String name,
-            String major,
-            double gpa) {
-
         this.id = id;
         this.name = name;
         this.major = major;
@@ -40,36 +31,18 @@ public class Student {
 
     @Override
     public int hashCode() {
-
+        return id % 97;
-        // TODO:
-        // Return custom hash
-
-        // Example:
-        // return id % 97;
-
-        return 0;
     }
 
     @Override
     public boolean equals(Object obj) {
-
+        if (this == obj) return true;
-        // TODO:
+        if (obj == null || getClass() != obj.getClass()) return false;
-
+        Student student = (Student) obj;
-        // Step 1:
+        return id == student.id;
-        // Check null
-
-        // Step 2:
-        // Convert obj to Student
-
-        // Step 3:
-        // Compare IDs
-
-        return false;
     }
-
     @Override
     public String toString() {
-
         return "Student{" +
                 "id=" + id +
                 ", name='" + name + '\'' +
@@ -77,5 +50,4 @@ public class Student {
                 ", gpa=" + gpa +
                 '}';
     }
-
 }

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

@@ -1,55 +1,37 @@
 package dev.service;
 
 import dev.model.Student;
-
 import java.util.ArrayList;
 
-
 public class StudentManager {
-
     private final ArrayList<Student> students = new ArrayList<>();
 
     public void addStudents(ArrayList<Student> newStudents) {
-
+        students.addAll(newStudents);
-        // TODO:
-
-        // Merge students
-
-        // Hint:
-        // addAll()
-
     }
 
     public Student searchStudent(int id) {
-
+        for (Student student : students) {
-        // TODO:
+            if (student.getId() == id) {
-
+                return student;
-        // Loop through students
+            }
-
+        }
-        // Compare IDs
-
         return null;
     }
 
     public boolean removeStudent(int id) {
-
+        for (int i = 0; i < students.size(); i++) {
-        // TODO:
+            if (students.get(i).getId() == id) {
-
+                students.remove(i);
-        // Find student
+                return true;
-
+            }
-        // Remove student
+        }
-
         return false;
     }
 
     public void printStudents() {
-
         for (Student student : students) {
-
             System.out.println(student);
-
         }
-
     }
-
 }

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

@@ -1,59 +1,33 @@
 package dev.thread;
 
-
-
 import dev.model.Student;
-
 import java.util.ArrayList;
 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<>();
 
     public StudentLoader(List<String> lines) {
-
         this.lines = lines;
     }
 
     @Override
     public void run() {
-
-        // TODO:
-
-        /*
-        Example line:
-
-        1001,Aryan,Computer Science,3.7
-         */
-
         for (String line : lines) {
+            String[] data = line.split(",");
+            if (data.length == 4) {
+                int id = Integer.parseInt(data[0].trim());
+                String name = data[1].trim();
+                String major = data[2].trim();
+                double gpa = Double.parseDouble(data[3].trim());
 
-            // TODO:
+                students.add(new Student(id, name, major, gpa));
-            // split line
+            }
-
-            // TODO:
-            // read values
-
-            // TODO:
-            // create Student
-
-            // TODO:
-            // add to students list
-
         }
-
     }
 
     public ArrayList<Student> getStudents() {
-
         return students;
     }
-
 }

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

@@ -2,31 +2,21 @@ package dev.utils;
 
 import java.io.BufferedReader;
 import java.io.FileReader;
-
 import java.util.ArrayList;
 import java.util.List;
 
 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) {
-
+            lines.add(line);
-            // TODO:
-
-            // Add line to list
-
         }
 
         reader.close();
-
         return lines;
     }
-
 }

src/main/java/lecture/multithreading/timeout/Main.java

@@ -1,10 +1,31 @@
 package lecture.multithreading.timeout;
 
-
-
 public class Main {
     public static void main(String[] args) {
-        // TODO
+        Thread worker = new Thread(() -> {
+            try {
+                System.out.println("Worker thread started...");
+                Thread.sleep(5000);
+                System.out.println("Worker thread finished its job.");
+            } catch (InterruptedException e) {
+                System.out.println("Worker thread was interrupted (Timeout reached)!");
+            }
+        });
+
+        worker.start();
+
+        try {
+            worker.join(2000);
+
+            if (worker.isAlive()) {
+                System.out.println("Main thread: Task took too long. Interrupting...");
+                worker.interrupt();
+            } else {
+                System.out.println("Main thread: Task completed within the time limit.");
+            }
+
+        } catch (InterruptedException e) {
+            e.printStackTrace();
+        }
     }
 }
-