Added Threads

60-TimeTask/60-TimeTask.iml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <module type="JAVA_MODULE" version="4">
   <component name="NewModuleRootManager">
-    <output url="file://$MODULE_DIR$/out/production/" />
+    <output url="file://$MODULE_DIR$/out/production" />
     <output-test url="file://$MODULE_DIR$/../out/test/60-TimeTask" />
     <exclude-output />
     <content url="file://$MODULE_DIR$">

61-Threads/61-Threads.iml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager">
+    <output url="file://$MODULE_DIR$/out/production/" />
+    <output-test url="file://$MODULE_DIR$/../out/test/61-Threads" />
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

61-Threads/src/Main.java

@@ -0,0 +1,53 @@
+public class Main {
+    public static void main(String[] args) throws InterruptedException {
+
+        /*thread - 	A thread of execution in a program (kind of like a virtual CPU)
+    				The JVM allows an application to have multiple threads running concurrently
+    				Each thread can execute parts of you code in parallel with the main thread
+    				Each thread has a priority.
+    				Threads with higher priority are executed in preference compared to threads with a lower priority
+
+    			    The Java Virtual Machine continues to execute threads until either of the following occurs
+    					1. The exit method of class Runtime has been called
+    					2. All user threads have died
+
+    				When a JVM starts up, there is a thread which calls the main method
+    				This thread is called “main”
+
+    				Daemon thread is a low priority thread that runs in background to perform tasks such as garbage collection
+				    JVM terminates itself when all user threads (non-daemon threads) finish their execution
+    	 */
+
+        //System.out.println(Thread.activeCount());
+        //Thread.currentThread().setName("Main");
+        //System.out.println(Thread.currentThread().getName());
+
+        //Thread.currentThread().setPriority(10);
+        //System.out.println(Thread.currentThread().getPriority());
+
+        //System.out.println(Thread.currentThread().isAlive());
+
+        /*for (int i = 3; i > 0; i--) {
+            System.out.println(i);
+            Thread.sleep(1000);
+        }
+        System.out.println("Done!");*/
+
+        MyThread threadTwo = new MyThread();
+        //threadTwo.start();
+        //threadTwo.run(); - status is false
+        //System.out.println(threadTwo.isAlive());
+        //threadTwo.setName("Thread Two");
+        //System.out.println(threadTwo.getName());
+        //it will inherit the priority of the thread that created it
+        //System.out.println(threadTwo.getPriority());
+
+        //threadTwo.setPriority(1);
+
+        //System.out.println(Thread.activeCount());
+        threadTwo.setDaemon(true);
+        System.out.println(threadTwo.isDaemon());
+        threadTwo.start();
+
+    }
+}

61-Threads/src/MyThread.java

@@ -0,0 +1,12 @@
+public class MyThread extends Thread {
+
+    @Override
+    public void run() {
+        if (this.isDaemon()) {
+            System.out.println("This is a Daemon thread");
+        } else {
+            System.out.println("This is user thread");
+        }
+    }
+
+}