Solved

how to solve this problem?

Posted on 2002-07-24
12
243 Views
Last Modified: 2008-01-09
I am a beginer of Java.
when i test the java but there is an error:
"Exception in thread "main" java.lang.NoClassDefFoundError"
above is the result on Win2000,but when i test the java code at UNIX,it is ok. i know this is because of my  installation error but i can not find why?
Should give me help! Thanks!
0
Comment
Question by:ealry1974
  • 7
  • 4
12 Comments
 

Author Comment

by:ealry1974
ID: 7176392
Thanks!
0
 
LVL 1

Expert Comment

by:mErCuR4
ID: 7176497
can u show us your code??
0
 

Author Comment

by:ealry1974
ID: 7176512
The code of this test as following:
======================
import java.util.*;

public class HelloDate {
    public static void main(String[] args) {
    System.out.println("Hello, it's: ");
    System.out.println(new Date());
  }
}
======================
thanks!
0
Is Your AD Toolbox Looking More Like a Toybox?

Managing Active Directory can get complicated.  Often, the native tools for managing AD are just not up to the task.  The largest Active Directory installations in the world have relied on one tool to manage their day-to-day administration tasks: Hyena. Start your trial today.

 
LVL 86

Expert Comment

by:CEHJ
ID: 7176537
Can you compile the code you gave OK on Win2K?
0
 

Author Comment

by:ealry1974
ID: 7176604
The following is the informations of javac,I think the trouble must be the .jar file.
************
D:\jdk\bin>javac -verbose d:\jdk\source\HelloDate.java
[parsing started d:\jdk\source\HelloDate.java]
[parsing completed 188ms]
[loading D:\jdk\jre\lib\rt.jar(java/lang/Object.class)]
[loading D:\jdk\jre\lib\rt.jar(java/lang/String.class)]
[checking HelloDate]
[loading D:\jdk\jre\lib\rt.jar(java/lang/System.class)]
[loading D:\jdk\jre\lib\rt.jar(java/io/PrintStream.class)]
[loading D:\jdk\jre\lib\rt.jar(java/io/FilterOutputStream.class)]
[loading D:\jdk\jre\lib\rt.jar(java/io/OutputStream.class)]
[loading D:\jdk\jre\lib\rt.jar(java/util/Date.class)]
[wrote d:\jdk\source\HelloDate.class]
[total 1094ms]
****************
If the complie is ok the loading should be loaded.Can you tell me why?
I use the JDK 1.4 on WIN2000.
Thannks!
0
 
LVL 86

Expert Comment

by:CEHJ
ID: 7176622
OK. First, are java and javac in your path (type path at the command line)? If not, add D:\jdk\bin to your path and while you're about it, you may as well add JAVA_HOME as d:\jdk as an environment variable. Come back when you've done it!
0
 

Author Comment

by:ealry1974
ID: 7176653
Yeah!I did it when I installed the java. But the thing is not smooth!
0
 
LVL 86

Expert Comment

by:CEHJ
ID: 7176667
OK, so now you need to be in the d:\jdk\source directory, not bin. Try it again from there: javac HelloDate.java (why they had to require the file extension I don't know!).
Let me know what happens!
0
 

Author Comment

by:ealry1974
ID: 7176672
Yeah!I did it when I installed the java. But the thing is not smooth!
0
 

Author Comment

by:ealry1974
ID: 7176684
Ok,I do it as you told me and successful!
Thanks very much!
0
 
LVL 86

Accepted Solution

by:
CEHJ earned 20 total points
ID: 7176702
Thank you! Can you close the question then...
0
 

Author Comment

by:ealry1974
ID: 7176719
Thank you very much!CEHJ!
Good lucky!
0

Featured Post

DevOps Toolchain Recommendations

Read this Gartner Research Note and discover how your IT organization can automate and optimize DevOps processes using a toolchain architecture.

Question has a verified solution.

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

Suggested Solutions

An old method to applying the Singleton pattern in your Java code is to check if a static instance, defined in the same class that needs to be instantiated once and only once, is null and then create a new instance; otherwise, the pre-existing insta…
Introduction This article is the first of three articles that explain why and how the Experts Exchange QA Team does test automation for our web site. This article explains our test automation goals. Then rationale is given for the tools we use to a…
Video by: Michael
Viewers learn about how to reduce the potential repetitiveness of coding in main by developing methods to perform specific tasks for their program. Additionally, objects are introduced for the purpose of learning how to call methods in Java. Define …
This tutorial covers a step-by-step guide to install VisualVM launcher in eclipse.

773 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