[Vneha]

Hi

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1. class NewThread implements Runnable {
2.     Thread t;
3.  
4.     NewThread() {
5.         t = new Thread(this, "Demo Thread");
6.         System.out.println("Child Thread:" + t);
7.         t.start();
8.     }
9.  
10.     public void run() {
11.         try {
12.             for (int i = 5; i > 0; i--) {
13.                 System.out.println("Child Thread:" + i);
14.                 Thread.sleep(500);
15.             }
16.         } catch (InterruptedException e) {
17.             System.out.println("Child interuppted.");
18.         }
19.         System.out.println("Exiting child Thread");
20.     }
21. }
22.  
23. class ThreadDemo {
24.     public static void main(String[] args) {
25.         new NewThread();
26.         try {
27.             for (int i = 5; i > 0; i--) {
28.                 System.out.println("Main Thread:" + i);
29.                 Thread.sleep(1000);
30.             }
31.         } catch (InterruptedException e) {
32.             System.out.println("Main thread interuppted.");
33.         }
34.         System.out.println("Main thread exiting.");
35.     }
36. }
37.  

When i try to run it on command prompt i get this error.

c:\java>javac ThreadDemo.java

c:\java>java ThreadDemo
Exception in thread "main" java.lang.NoClassDefFoundError: ThreadDemo
Caused by: java.lang.ClassNotFoundException: ThreadDemo
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)

c:\java>

CAN YOU PLEASE GUIDE ME WHERE I AM WRONG.

Regards,

Neha

[JosAH]

Run it like this:

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1. java -classpath . ThreadDemo
2.  

This tells the JVM to look in the current directory '.' for classes. Also make your
ThreadDemo class a public class.

kind regards,

Jos