.idea/misc.xml

@@ -8,7 +8,7 @@
       </list>
     </option>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_21" default="true" project-jdk-name="21" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_25" default="true" project-jdk-name="25" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>

Report.md

@@ -0,0 +1,51 @@
+## Question 1
+output:
+```angular2html
+Calling run()
+Running in: main
+Calling start()
+Running in: Thread-2
+```
+note that there will be a 100ms pause before calling start.
+
+when calling `t1.run()` no other thread will be created and `Thread.currentThread().getName()` returns the thread that was already running. 
+
+but when calling `t2.start()` a branch new thread gets created alongside the main one named _Thread-2_.
+
+## Question 2
+output:
+```angular2html
+Main thread ends.
+Daemon thread running...
+```
+when we use  `setDaemon(true)` method for a thread it means that there is no need for _JVM_ to wait for this thread to finish its job and end the program.
+
+So if we call `thread.start()` after setting the thread a daemon one a new daemon thread gets created and as soon as there is time for the main thread (because of the 0.5 second pause) it finishes the program.
+
+If we were not to set the thread a daemon, we could see the expression `Daemon thread running...` 20 times which 0.5 second pauses.
+
+It is useful for health check and monitoring, cache eviction etc...
+
+## Question 3
+output:
+```angular2html
+Thread is running using a ...!
+```
+`() -> { ... }` is called a _Lambda Expression_.
+If we were to write this functionality in a simple way and not in lambda:
+```java
+public class ThreadDemo {
+    
+    static class MyRunnable implements Runnable {
+        @Override
+        public void run() {
+            System.out.println("Thread is running using a ...!");
+        }
+    }
+    
+    public static void main(String[] args) {
+        Thread thread = new Thread(new MyRunnable());
+        thread.start();
+    }
+}
+```

src/main/java/temp.java

@@ -0,0 +1,9 @@
+public class temp {
+    public static void main(String[] args) {
+        Thread thread = new Thread(() -> {
+            System.out.println("Thread is running using a ...!");
+        });
+
+        thread.start();
+    }
+}