Here is an example code fragment:
abstract class Outer
{
   protected abstract int getValue();

I'm getting the error "incompatible types - found void but expected
java.sql.Connection" on the line "connection =
dbConnection.getConnection();" does anyone have any ideas why?  What can I
do to fix it?

I'm unable to get Jars to work on linux, i continue to get the
error, "Exception in thread "main"" Yet when i run it on windows
it works fine.  I have installed the latest SDK and the VM is
already installed, any remedy to my problem would be great.

I was just wondering...  I need to implement a queue in some work i'm
doing at the moment, and rather than code my own i was considering using
the built in objects to do so.
I was a little confused by the declaration of "Queue<E>" - do i have to

Could someone clarify why the following java code doesn't work?
class Example {
 public static void main(String args[]) {
  float x = Float.MAX_VALUE;

I'm fairly new to GUI and I'm trying to use
Container c = getContentPane();
the compiler says that it can not find the symbol getContentPane() what
should I do?

I want to dynamically insert some information into my java source code
each time before I compile my source. This can be e.g.
The compilation time, the automatically incremented version number
or the compilation computer name.

I can explain much more concisely with an example...
class Cow<C> {
public Cow (Class<C> clazz) {}
}

It seems that more an more I'm having trouble seeing text that is
displayed on what I believe to be JAVA-generated web pages.  When I say
"seeing", I mean it just isn't visible until I run my cursor over the
page.  I can see graphics OK, but the printing isn't visible.   I also

I have the follwoing problem. I'm ploting a point into a graphics
object using graphics.fillOval function. When the user point the mouse
in this point, I'd like to show a box (something like a JTipTool) with
a message but I'm not able to do that. I tried to extend JComponet and

I am fairly new to Java, only been programming in it for about a year or so.
One of my colleagues mentioned to me that it is possible to have a memory
leak in Java.  I have a C/C++ background and I am very familiar with memory
leaks there, but in Java? Is this possible? If so, ...

I am learning Java with a manual.
I have managed to install Jakarta Tomcat 4.1.27 on Windows XP Pro SP2
Now I would like to compile a WelcomeServlet.java source.
It starts with:

Could someone please explain to me why it is not possible to have the
following construct?
public class MyGenericClass<E extends Enum<E>>
{

I am resding the source of jdk1.5.0 and see that kind of sign  : <E>.
public interface Collection<E> extends Iterable<E> {
What is the use of theese?

The following code always displays "File cannot be deleted".
Any idea on the way to allow a file to be deleted when it has been used
by a URL class loader to load code ?
public class ClassLoaderTester {