Help with "hello world"

[fogus]

After 3 hours I have decided to turn this over to the experts.

The helloworld.java program is:

Code:

public class helloworld
{
   public static void main(String args[])
   {
      System.out.println("hello world");
   }
}

The result is:

Code:

>java helloworld
java.lang.NoClassDefFoundError: helloworld
Caused by: java.lang.ClassNotFoundException: helloworld
	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)
Exception in thread "main" >Exit code: 1

I am using SciTE as an editor, but I get the same result in the command prompt, when I use:

Code:

command.compile.*.java=javac $(FileNameExt)
command.build.*.java=javac *.java
command.go.*.java=java $(FileName)

I think this has something to do with my "environment variables"; JCreator can run this program just fine.

Here are the relavent environment variables:
System Variables\CLASSPATH:
C:\Program Files\Java\jdk1.6.0_04\src.jar;
C:\Program Files\Java\jdk1.6.0_04\lib\dt.jar;
C:\Program Files\Java\jdk1.6.0_04\lib\tools.jar;
C:\Program Files\Java\jdk1.6.0_04\jre\lib\il8n.jar;
C:\Program Files\Java\jdk1.6.0_04\jre\lib\jaws.jar;
C:\Program Files\Java\jdk1.6.0_04\jre\lib\rt.jar;
C:\Program Files\Java\jdk1.6.0_04\jre\demo\sound\JavaSound.ja r;
C:\Program Files\Java\jdk1.6.0_04\demo\jfc\SwingSet2\SwingSet 2.jar;
C:\Program Files\Java\jdk1.6.0_04\demo\jfc\SwingApplet\SwingA pplet.jar;
C:\Program Files\Java\jdk1.6.0_04\;
C:\Program Files\Java\jdk1.6.0_04\Bin;
C:\Program Files\Java\jdk1.6.0_04\Lib;
(all on one line, of course)

User Variables\PATH:
C:\Program Files\Java\jdk1.6.0_04\bin

However, when I run SciTE pointed at:

Code:

command.compile.*.java=C:\Program Files\Java\jdk1.6.0_04\bin\javac $(FileNameExt)
command.build.*.java=C:\Program Files\Java\jdk1.6.0_04\bin\javac *.java
command.go.*.java=C:\Program Files\Java\jdk1.6.0_04\bin\java $(FileName)

I get a slightly different message:

Code:

java.lang.NoClassDefFoundError: helloworld
Caused by: java.lang.ClassNotFoundException: helloworld
	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" >Exit code: 1

1. Anyone care to clue me in on why the default installation of JDK does not work with the command prompt?
2. What should my environment variables be?

[Menre]

Hi,

I have noticed something wrong in your coding. In your programme you wrote the line below

public static void main(String args[])

It should be written the way below

public static void main(String[] args )

I hope this solves your problem.

Regards,
Menre

[Menre]

Hi,

Sorry, that post was meant for another entry. I have previwed your code in JCreator and it works fine. Both code below work.

public static void main(String args[])

or

public static void main(String[] args)

Regards,
Menre

[neethur]

I have lost my httpservlet.jar file from my system, can anyone help me by sending one to my id "neethmohan@yahoo.com"

[Jman]

Hi Fogus

I think your problem is that you have not yet compiled your code. I say think because you just mention running java helloworld. If I am wrong please forgive me. But here goes anyway. Try the following
1. save the code as helloworld.java
2. cd to the directory you stored the helloworld.java file
3. run javac helloworld.java
4. then run java helloworld
this should work.

[fogus]

You know, Jman, I had tried those steps before, but for some reason things just started to work all of a sudden. Perhaps my environment variables just didn't kick in for a while.

Thanks everyone; the issue has been solved.