feat: Complete timeout example for threading

.idea/.gitignore

@@ -1,10 +0,0 @@
-# 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

@@ -1,13 +0,0 @@
-<?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

@@ -1,7 +0,0 @@
-<?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

@@ -1,20 +0,0 @@
-<?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://maven.devneeds.ir/" />
-    </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

@@ -1,12 +0,0 @@
-<?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" project-jdk-name="26" project-jdk-type="JavaSDK" />
-</project>

.idea/vcs.xml

@@ -1,6 +0,0 @@
-<?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

@@ -1,34 +1,22 @@
 package dev;
 
-
-import dev.model.Student;
 import dev.service.StudentManager;
 import dev.thread.StudentLoader;
 import dev.utils.FileManager;
 
-
-import java.util.ArrayList;
 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();
-        StudentManager manager =
-                new StudentManager();
-
-
 
         while (true) {
 
-
             System.out.println("""
                     1.Load students
                     2.Search student
@@ -37,180 +25,71 @@ public class Main {
                     5.Exit
                     """);
 
-
-
             int choice = scanner.nextInt();
 
-
-
             switch (choice) {
 
-
-
                 case 1 -> {
 
+                    List<String> data = FileManager.loadStudents("students.txt");
 
-                    List<String> data =
+                    // TODO:
-                            FileManager.loadStudents("students.txt");
 
+                    // Split data into 3 parts
 
+                    List<String> part1 = null;
 
-                    int size = data.size();
+                    List<String> part2 = null;
 
+                    List<String> part3 = null;
 
-                    int part = (int)Math.ceil(size / 3.0);
+                    // TODO:
 
+                    StudentLoader t1 = null;
 
+                    StudentLoader t2 = null;
 
-                    List<String> part1 =
+                    StudentLoader t3 = null;
-                            data.subList(
-                                    0,
-                                    Math.min(part,size)
-                            );
 
+                    // TODO:
 
-                    List<String> part2 =
+                    // start()
-                            data.subList(
-                                    Math.min(part,size),
-                                    Math.min(part*2,size)
-                            );
 
+                    // join()
 
-                    List<String> part3 =
+                    // merge results
-                            data.subList(
-                                    Math.min(part*2,size),
-                                    size
-                            );
-
-
-
-                    StudentLoader t1 =
-                            new StudentLoader(part1);
-
-
-                    StudentLoader t2 =
-                            new StudentLoader(part2);
-
-
-                    StudentLoader t3 =
-                            new StudentLoader(part3);
-
-
-
-                    t1.start();
-
-                    t2.start();
-
-                    t3.start();
-
-
-
-                    t1.join();
-
-                    t2.join();
-
-                    t3.join();
-
-
-
-
-                    ArrayList<Student> finalList =
-                            new ArrayList<>();
-
-
-                    finalList.addAll(t1.getStudents());
-
-                    finalList.addAll(t2.getStudents());
-
-                    finalList.addAll(t3.getStudents());
-
-
-
-                    manager.addStudents(finalList);
-
-
-
-                    System.out.println(
-                            "Students loaded: "
-                                    + finalList.size()
-                    );
-
 
                 }
 
-
-
                 case 2 -> {
 
-
                     System.out.print("ID: ");
 
-
                     int id = scanner.nextInt();
 
-
+                    System.out.println(manager.searchStudent(id));
-
-                    Student student =
-                            manager.searchStudent(id);
-
-
-
-                    if(student != null){
-
-                        System.out.println("Found:");
-
-                        System.out.println(student);
 
                 }
 
-                    else{
-
-                        System.out.println("Student not found.");
-
-                    }
-
-
-                }
-
-
-
                 case 3 -> {
 
-
                     System.out.print("ID: ");
 
-
                     int id = scanner.nextInt();
 
+                    boolean removed = manager.removeStudent(id);
 
-                    System.out.println(
+                    System.out.println(removed);
-                            manager.removeStudent(id)
-                    );
-
 
                 }
 
-
+                case 4 ->
-
-                case 4 -> {
-
-
                         manager.printStudents();
 
-
-                }
-
-
-
                 case 5 -> {
-
-
                     return;
-
-
                 }
 
-
             }
 
         }

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

@@ -3,11 +3,18 @@ package dev.model;
 public class Student {
 
     private final int id;
+
     private final String name;
+
     private final String major;
+
     private final double gpa;
 
-    public Student(int id, String name, String major, double gpa) {
+    public Student(
+            int id,
+            String name,
+            String major,
+            double gpa) {
 
         this.id = id;
         this.name = name;
@@ -31,35 +38,35 @@ public class Student {
         return gpa;
     }
 
-
     @Override
     public int hashCode() {
 
-        return id % 97;
+        // TODO:
-    }
+        // Return custom hash
 
+        // Example:
+        // return id % 97;
+
+        return 0;
+    }
 
     @Override
     public boolean equals(Object obj) {
 
-        if (obj == null) {
+        // TODO:
+
+        // Step 1:
+        // Check null
+
+        // Step 2:
+        // Convert obj to Student
+
+        // Step 3:
+        // Compare IDs
+
         return false;
     }
 
-        if (this == obj) {
-            return true;
-        }
-
-        if (getClass() != obj.getClass()) {
-            return false;
-        }
-
-        Student other = (Student) obj;
-
-        return id == other.id;
-    }
-
-
     @Override
     public String toString() {
 
@@ -70,4 +77,5 @@ public class Student {
                 ", gpa=" + gpa +
                 '}';
     }
+
 }

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

@@ -4,58 +4,46 @@ import dev.model.Student;
 
 import java.util.ArrayList;
 
-public class StudentManager {
 
+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) {
 
+        // TODO:
 
-        for (Student student : students) {
+        // Loop through students
-
-
-            if (student.getId() == id) {
-
-                return student;
-            }
-
-        }
 
+        // Compare IDs
 
         return null;
     }
 
-
     public boolean removeStudent(int id) {
 
+        // TODO:
 
-        Student student = searchStudent(id);
+        // Find student
-
-
-        if (student != null) {
-
-            students.remove(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

@@ -1,58 +1,56 @@
 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) {
 
+            // TODO:
+            // split line
 
-            String[] data = line.split(",");
+            // TODO:
+            // read values
 
+            // TODO:
+            // create Student
 
-            int id = Integer.parseInt(data[0]);
+            // TODO:
-
+            // add to students list
-            String name = data[1];
-
-            String major = data[2];
-
-            double gpa = Double.parseDouble(data[3]);
-
-
-            Student student =
-                    new Student(id, name, major, gpa);
-
-
-            students.add(student);
 
         }
 
-
     }
 
-
     public ArrayList<Student> getStudents() {
 
         return students;

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

@@ -1,46 +1,31 @@
 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 {
-    public static List<String> loadStudents(String path)
-            throws Exception {
-
 
         List<String> lines = new ArrayList<>();
 
-
+        BufferedReader reader = new BufferedReader(new FileReader(path));
-        BufferedReader reader =
-                new BufferedReader(
-                        new FileReader(path)
-                );
-
 
         String line;
 
-
         while ((line = reader.readLine()) != null) {
 
+            // TODO:
 
-            if (!line.isEmpty()) {
+            // Add line to list
-
-                lines.add(line);
 
         }
 
-        }
-
-
         reader.close();
 
-
         return lines;
     }
 

src/main/java/lecture/multithreading/basics/JoinSimpleExample.java

@@ -25,7 +25,7 @@ public class JoinSimpleExample {
         System.out.println("The main thread waits until the worker finishes...");
 
         try {
-            worker.join();
+            worker.join(); // The main thread stops here until the worker finishes
         } catch (InterruptedException e) {
             e.printStackTrace();
         }

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

@@ -1,36 +1,25 @@
 package lecture.multithreading.timeout;
 
+
+import java.util.Scanner;
+
 public class Main {
-    public static void main(String[] args) throws InterruptedException {
+    public static void main(String[] args) {
 
-        Thread worker = new Thread(new Runnable() {
+        Scanner scanner = new Scanner(System.in);
-            @Override
-            public void run() {
-                System.out.println("👷 Worker started...");
-                try {
-                    Thread.sleep(10000); // Runs for 10 seconds
-                } catch (InterruptedException e) {
-                    System.out.println("🛑 Worker was interrupted!");
-                }
-                System.out.println("👷 Worker finished!");
-            }
-        });
 
-        worker.start();
+        System.out.println("you have 10 seconds: ");
+        System.out.print("enter your name: ");
 
-        System.out.println("Main: waiting max 3 seconds for worker...");
+        MyRunnable myRunnable = new MyRunnable();
+        Thread thread = new Thread(myRunnable);
+        thread.setDaemon(true);
+        thread.start();
 
-        // join with timeout (in milliseconds)
+        String name = scanner.nextLine();
-        worker.join(3000);
+        System.out.println("hello " + name);
 
-        if (worker.isAlive()) {
+        scanner.close();
-            System.out.println("⏰ Timeout reached! Worker is still running.");
-            System.out.println("Main: I'm not waiting anymore, continuing...");
-        } else {
-            System.out.println("Worker finished before timeout.");
-        }
-
-        System.out.println("Main thread continues its own work now.");
     }
 }
 

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

@@ -0,0 +1,22 @@
+package lecture.multithreading.timeout;
+
+public class MyRunnable implements Runnable{
+
+    @Override
+    public void run(){
+
+        for (int i = 1; i <= 10 ; i++){
+            try {
+                Thread.sleep(1000);
+            } catch (InterruptedException e) {
+                System.out.println("thread was interrupted");
+            }
+
+            if(i == 10){
+                System.out.println("time is up");
+                System.exit(0);
+            }
+
+        }
+    }
+}