NoClassDefFound error running Java application from Eclipse
I am setting up a new computer. I copied my workspace directory from my old computer to my new computer. I also copied my Eclipse directory from my old computer to my new computer. When I run a Java class from Eclipse on my new computer I get a NoClassDefFound error for the class I am running. When I do the same thing on the old computer it works fine. I installed the Java SDK from scratch on the new computer. I also have the new Java SDK in a different directory on my new computer than on my old computer. I have also tried a bunch of ways to add the directory in which the class files are into the classpath. I am putting the class files into the default "output" directory under the project's home directory. This is the default value in Eclipse. Do you have any suggestions? I don't understand why Eclipse is not finding the class files. I also verified that the class files exist under the output directory.
Mick Barry
have you done a clean build of the project
ASKER
yes
Do you have all exactly the same paths on your new computer as on the old one?
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ASKER
I confirmed that all the jar files exist on the new computer.
> I confirmed that all the jar files exist on the new computer.
eclipse would tell you if they weren't
Did you create a new run configuration?
What class is it missing
eclipse would tell you if they weren't
Did you create a new run configuration?
What class is it missing
ASKER
I just chose "Run Configuration" from the Run menu and then clicked the "New" button and created a new configuration for the class I was trying to run. There was no complaint about any missing classes. I only get an error after I try to run the class. That is when I get a NoClassDefFound error for the main method of the class I am trying to execute even though I have a main method.
what if u right click on the main class and select Run as>Java App
ASKER
I have not had a chance to test this yet.
ASKER
I had to uninstall my Java JDK and reinstall a 32-bit Java JDK.