Problem in Threads with Netbeans

Question

java.lang.NoClassDefFoundError: Thread/Controller
Caused by: java.lang.ClassNotFoundException: Thread.Controller
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:276)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
Exception in thread "main"
I got the above exception in Net beans but not if running the below program using Command Prompt. Please advice what I have to do in Net Beans to run this program in Net Beans.
class Worker implements Runnable { // (1)
private Thread theThread; // (2)
public void kickStart() { // (3)
if (theThread == null) {
theThread = new Thread(this);
theThread.start();
public void terminate() { // (4)
theThread = null;
public void run() { // (5)
while (theThread == Thread.currentThread()) { // (6)
System.out.println("Going around in loops.");
public class Controller {
public static void main(String[] args) { // (7)
Worker worker = new Worker(); // (8)
worker.kickStart(); // (9)
Thread.yield(); // (10)
worker.terminate(); // (11)

Answer 1

This can't work. Since the scope is session, if you get another request on the same session before the thread finishes, when you do the setPropertys for the subsequent request you'll change the fields the original thread is using. Why don't you try making the bean request scope. That way the next time, you'll get a new bean so you won't be interfering with the threads that are already running.