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Message-ID: <43AC6CA8.3020906@spree.de>
Date: Fri, 23 Dec 2005 22:31:20 +0100
From: Michael Bouschen <mbo.tech@spree.de>
Organization: Tech@Spree Engineering
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To: Apache JDO project <jdo-dev@db.apache.org>
Subject: NoClassDefFoundError on Windows
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Hi Martin,

here is a simple test case showing the NoClassDefFoundError discussed in 
JDO-194.I does a Class.forName for foo.bar when there is a class 
foo.Bar. Attached you find a class Bar, please store it in a directory 
foo. Class Main executes the Class.forName. I tried jdk 1.4.2_10 and 
1.5.0_05. Both result in a NoClassDefFoundError: foo/bar (wrong name: 
foo/Bar). You find the stacktraces attached.

Regards Michael

-- 
Michael Bouschen		Tech@Spree Engineering GmbH
mailto:mbo.tech@spree.de	http://www.tech.spree.de/
Tel.:++49/30/235 520-33		Buelowstr. 66			
Fax.:++49/30/2175 2012		D-10783 Berlin			


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package foo;

public class Bar {}


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public class Main
{
    public static void main(String[] args) {
        try {
            // Note, class foo.bar does not exist, but foo.Bar does!
            Class.forName("foo.bar");
        } catch (ClassNotFoundException ex) {
            ex.printStackTrace();
        }
    }
}


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java.lang.NoClassDefFoundError: foo/bar (wrong name: foo/Bar)
	at java.lang.ClassLoader.defineClass0(Native Method)
	at java.lang.ClassLoader.defineClass(ClassLoader.java:539)
	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:123)
	at java.net.URLClassLoader.defineClass(URLClassLoader.java:251)
	at java.net.URLClassLoader.access$100(URLClassLoader.java:55)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:194)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:187)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:289)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:274)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:235)
	at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:302)
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:141)
	at Main.main(Main.java:6)
Exception in thread "main" 

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Exception in thread "main" java.lang.NoClassDefFoundError: foo/bar (wrong name: foo/Bar)
	at java.lang.ClassLoader.defineClass1(Native Method)
	at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
	at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
	at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
	at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:164)
	at Main.main(Main.java:6)


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