java's problems

Posted on 2002-04-16
Last Modified: 2013-11-23
i am now using the SAMS-Teach yourself Java2 in 21 days,but
faced some problems and needed for your help!

firstly,i used jdk1.2.2 version.According to the book,after installing
we might notice that one files installed in the JDK\lib subfolder
called,but i cant find it.I used (Statr|Find|Files and folder)
to search the whole directory C: which i installed but the result was same.

second,i followed the book to set the path and type java -version and the
following displayed :"
java version 1.2.2
Classic VM (build JDK-1.2.2-W,native threads,symcjit)"

After that, i compiled the source files  in the
successfully!A files called HelloDan.class is found in the same folder that
contains But,when i run it,the following error displayed:
'Exception in thread "main"java.lang.NoClassDefFoundError:HelloDan'
and i even followed the book to set the classpath,the same thing happenned.
so ,what should i do?Is there anyway to rectify this problems?

**I am using Windows98,Pentium MMX 200 **
Question by:tmchuan
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
LVL 19

Accepted Solution

cheekycj earned 50 total points
ID: 6945471
are you running the file using:
java HelloDan

not java HelloDan.class

about the
"With the Java 2 platform, the system classes no longer reside in a zip file (a good idea, considering occasional misguided attempts at unzipping the file). They're now stored in a Java Archive (jar) file. The runtime classes are found in the file rt.jar (located in the jre/lib directory), while the JDK-supported tool classes are found in the tools.jar file (located in the lib directory)." from

LVL 19

Expert Comment

ID: 6945475

Expert Comment

ID: 6945481
try running the java interpreter with the -cp option
including the current directory (assuming you just
compiled it there)
such as:

java -cp . HelloDan

this should pick up the class files from the current directory
Online Training Solution

Drastically shorten your training time with WalkMe's advanced online training solution that Guides your trainees to action. Forget about retraining and skyrocket knowledge retention rates.


Expert Comment

ID: 6946937
check ur CLASSPATH
place . in it

Author Comment

ID: 6954435
Thanks a lots...good luck

Author Comment

ID: 6954442
Thanks a lots...good luck

Author Comment

ID: 6954448
Thanks to mrowka and rjackman ....

Author Comment

ID: 6954453
Thanks to mrowka and rjackman ....
LVL 19

Expert Comment

ID: 6954459
Thanx for the "A"

Featured Post

Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
going to wrong jsp page 2 50
Problem to Alipay 10 72
java example issue 5 46
How to fix  socket closed error 11 32
Introduction This article is the second of three articles that explain why and how the Experts Exchange QA Team does test automation for our web site. This article covers the basic installation and configuration of the test automation tools used by…
Basic understanding on "OO- Object Orientation" is needed for designing a logical solution to solve a problem. Basic OOAD is a prerequisite for a coder to ensure that they follow the basic design of OO. This would help developers to understand the b…
Viewers learn about the “for” loop and how it works in Java. By comparing it to the while loop learned before, viewers can make the transition easily. You will learn about the formatting of the for loop as we write a program that prints even numbers…
Viewers will learn about arithmetic and Boolean expressions in Java and the logical operators used to create Boolean expressions. We will cover the symbols used for arithmetic expressions and define each logical operator and how to use them in Boole…

730 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question