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ClassNotFoundException [message #882415]

Wed, 06 June 2012 08:34

Jonathan Camilleri
Messages: 50
Registered: July 2009

Member

package coff;

public class Mammal {
static
{ int a = 1;
assert a == 1;
System.out.println("mammal initialized");
}

}

package coff2;
import coff.Mammal;
public class Dog extends Mammal {

@SuppressWarnings("unused")
public static void main(String[] args) {
assert (1 != 0) : "this should never appear...";
System.out.println("Dog extends Mammal");

}

}

Caused by: java.lang.ClassNotFoundException: coff2.Dog
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)
Exception in thread "main"

Attachment: AssertionTest.rar
(Size: 1.68KB, Downloaded 20 times)

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Re: ClassNotFoundException [message #882475 is a reply to message #882415]

Wed, 06 June 2012 10:24

Eclipse User

Does this have anything to do with Eclipse? This looks like a general
problem running a java jar. This forum is for Eclipse JDT (compilation)
problems/questions. For general java questions you need to go somewhere
else.

Rich

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Re: ClassNotFoundException [message #882480 is a reply to message #882475]

Wed, 06 June 2012 10:34

Stephan Herrmann
Messages: 779
Registered: July 2009

Senior Member

Well, the attached rar contains a proper Eclipse / JDT project.
If the exception occurs when running the application inside the IDE, then something's fishy in JDT/Debug.
Otherwise, (if exception ocurrs outside Eclipse) I concur that the JDT forum is not a likely place to get help for this issue.

Stephan

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Re: ClassNotFoundException [message #882505 is a reply to message #882480]

Wed, 06 June 2012 11:38

Nitin Dahyabhai
Messages: 1847
Registered: July 2009

Senior Member

I wouldn't say it's a "proper" project--you have two JREs on the Java Build Path, and unless you've actually set up a 1.7 JRE in the preferences, your build path will be considered broken. An erroneous build path will, by default, abort the build and leave you with no class files, hence the Error at runtime.

---
Nitin Dahyabhai
Eclipse WTP, IBM

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