Name: rmT116609			Date: 02/04/2004


FULL PRODUCT VERSION :
java version "1.4.2"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2-b28)
Java HotSpot(TM) Client VM (build 1.4.2-b28, mixed mode)

FULL OS VERSION :
Microsoft Windows 2000 [Version 5.00.2195]

A DESCRIPTION OF THE PROBLEM :
Having multiple inner classes with the same name but in a different case, like 'a' and 'A', compiles, but fails during runtime, with a NoClassDefFoundError.

For eg, consider the following code,

public class test2{

	public class d{
		public void f(){
			System.out.println("fff");
		}
	}

	public class D{
		public void f1(){
			System.out.println("ggg");
		}
	}

	public static void main(String args[]){
		test2 t2 = new test2();
		t2.testthis();
	}

	public void testthis(){
		D dd = new D();
		d dd1 = new d();
		dd.f1();
		dd1.f();
	}

} 

this compiles fine and the class files generated are test2$d.class and test2.class.

When this is run, the following error is received.

Exception in thread "main" java.lang.NoClassDefFoundError: test2$d (wrong name:
test2$D)
        at java.lang.ClassLoader.defineClass0(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:502)
        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:12
3)
        at java.net.URLClassLoader.defineClass(URLClassLoader.java:250)
        at java.net.URLClassLoader.access$100(URLClassLoader.java:54)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:193)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:186)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:299)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:265)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:255)
        at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:315)
        at test2.testthis(test2.java:22)
        at test2.main(test2.java:17)



STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1. Compile the following program, test2.java
2. run it.

EXPECTED VERSUS ACTUAL BEHAVIOR :
In the console, the following should be seen.

ggg
fff
D:\test>java test2
Exception in thread "main" java.lang.NoClassDefFoundError: test2$d (wrong name:
test2$D)
        at java.lang.ClassLoader.defineClass0(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:502)
        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:12
3)
        at java.net.URLClassLoader.defineClass(URLClassLoader.java:250)
        at java.net.URLClassLoader.access$100(URLClassLoader.java:54)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:193)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:186)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:299)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:265)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:255)
        at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:315)
        at test2.testthis(test2.java:22)
        at test2.main(test2.java:17)


ERROR MESSAGES/STACK TRACES THAT OCCUR :
D:\test>java test2
Exception in thread "main" java.lang.NoClassDefFoundError: test2$d (wrong name:
test2$D)
        at java.lang.ClassLoader.defineClass0(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:502)
        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:12
3)
        at java.net.URLClassLoader.defineClass(URLClassLoader.java:250)
        at java.net.URLClassLoader.access$100(URLClassLoader.java:54)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:193)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:186)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:299)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:265)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:255)
        at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:315)
        at test2.testthis(test2.java:22)
        at test2.main(test2.java:17)


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
public class test2{

	public class d{
		public void f(){
			System.out.println("fff");
		}
	}

	public class D{
		public void f1(){
			System.out.println("ggg");
		}
	}

	public static void main(String args[]){
		test2 t2 = new test2();
		t2.testthis();
	}

	public void testthis(){
		D dd = new D();
		d dd1 = new d();
		dd.f1();
		dd1.f();
	}

}
---------- END SOURCE ----------
(Incident Review ID: 185004) 
======================================================================