J2sdk 1.4.2_04 NoClass DefFoundError

Hi,
This is a common error for many people but I still could not find a solution.
I installed a J2SDK1.4.2_04 on XP. Then it created 2 directories:
c:/j2sdk1.4.2_04 (all java tools in bin are inside)
c:/Program Files/Java/j2re1.4.2_04 (librarys includes rt.jar are inside)
Then I had a Java program called Hello.java created as in e:/java/homework/Hello.java
Then I set path, classpath and java home under Control Panel -> System -> Advanced -> Environment Viriables -> System variables
PATH:
%PATH%;c:\j2sdk1.4.2_04\bin;e:\java\homework
CLASSPATH:
.;%CLASSPATH%;e:\java\homework;c:\Program Files\Java\j2re1.4.2_04\lib\rt.jar
JAVA_HOME:
c:\j2sdk1.4.2_04
When I compile the file anywhere, for example, e:\javac e:\java\homework\Hello.java
it succeeded and generated a class file in e:\java\homework\Hello.class
it means the path was set correctly.
When I run the file in the same folder as e:\java\homework\java Hello
it showed "Hello World" correctly.
Here is the problem:
When I run the file in the other folder such as e:\java e:\java\homework\Hello
it showed:
Exception in thread "main" java.lang.NoClassDefFoundError: e:\java\homework\Hello
When I run again using an option to show steps: e:\java -verbose e:\java\homework\Hello
it showed a long list of steps. The "Exception..." error message was shown after the step:
[Loaded java.net.MalformedURLException from c:\Program Files\Java\j2re1.4.2_04\lib\rt.jar]
Anyone please help to solve this problem. I also tried the same thing on RedHat 9 with the same version of j2sdk1.4.2_04, and I also got the same problem.
Please please help...

Then I set path, classpath and java home under Control
Panel -> System -> Advanced -> Environment Viriables
-> System variables
PATH:
%PATH%;c:\j2sdk1.4.2_04\bin;e:\java\homeworkIf that is the actual value of your PATH environment variables when viewed under Control Panel > System > Advanced > Environment Viriables > System variables, then you may have screwed a few things up. Restore it to its original value (if you know what that was), and put "c:\j2sdk1.4.2_04\bin;" on the front of it. You do not need e:\java\homework on your path. If it doesn't really have %PATH% in it, but instead has some other stuff, then just remove e:\java\homework from the end.
CLASSPATH:
.;%CLASSPATH%;e:\java\homework;c:\Program
Files\Java\j2re1.4.2_04\lib\rt.jarIf I were you, I'd just set my classpath to ".;"
You do not need c:\Program Files\Java\j2re1.4.2_04\lib\rt.jar on it, and can specify e:\java\homework when running your java apps. If the value you've posted is the actual value shown under Control Panel > System > Advanced > Environment Viriables > System variables, then you should remove the "%CLASSPATH%"
JAVA_HOME:
c:\j2sdk1.4.2_04
When I run the file in the other folder such as
e:\java e:\java\homework\Hello
it showed:
Exception in thread "main"
java.lang.NoClassDefFoundError: e:\java\homework\HelloGood. Because you do not have a class on your classpath called e:\java\homework\Hello - you have one called Hello, so the same command you used earlier should work.
But, if like I suggested your classpath is now just .;, then you should specify the classpath on the command line when executing the app, by using java -cp e:\java\homework Hello

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>
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The Java GC helps you with memory management, but other system resources like file handles, threads, etc. are YOUR responsibility. Maybe it's your code that it's cleaning up after itself properly.
After i see in My Computer -> Propertiers
In last tab "performance":
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