I used to be uneasy at the fact that immutability
of a class object is only casually mentioned in
some tiny corner of the API documentation.
And I wonder why we can't do:

I get in my applications in this way :
In web.xml i have this
<login-config>
               <auth-method>FORM</auth-method>

Hi to all,
I'm using NetBeans 5.0 and I have this odd problem with the background
color of my JFrame (I have only one frame):
a) when I create the first instance of the frame as the main window,

Sorry if this topic has been beaten to death, or if there's an FAQ
(kindly point me to it); I'm a bit baffled by the following behaviour:
-----------
public void testTiming() {

I have been working with IntelliJ which keeps making suggestions to
improve you code. One thing it likes to do is add finals wherever it
can.
This presumably helps the compiler generate better code at it makes

Sorry, my english is very bad.
I'm studying a example about rectangles. I don´t have the source code.
The Rectangle class has two methods shown. One draws the rectangle on
the screen, the other computes the area of the rectangle. Two different

This is a puzzle for people with too much time.
How can you create an outer class that nobody but you can call, not
even members of your same package?
Hint enum was not always a reserved word.

I want to store values received from the user in array and then to
output the values on the screen.  I'm new to java and am having
problems setting up the array and assigning the values to the array.
Here is my code so far not sure where to go with it. My code is working

I always have trouble when working with the applications that have a
hardcoded specification to use a particular version of JRE. How can I
keep mutiple versions of JREs on my machine and how can I select one of
them to be used within the internet explorer at a time.

DATAs are being put in a TreeMap, how could I make sure that these
datas are being print out in the order they are read in ?
For example, I have datas as:
"07/20/2005", "NY",

Is there any algorithm to recursively collect object fields during the
runtime in java using
reflection mechanism. The process is similar to object serialization in
java. if the object contains a field which is an object , i have to

I am just getting started with Java, and come from a background in Microsoft
languages ... I am having a grand ole time with all of the Java Lingo. How
do I sort out all of the acronyms ... J2EE, J2SE, J2ME, servlets, applets,
etc., etc. Or does this just come with time???

I have a class that uses composition of interfaces. I want to be able
to allow users to decide at run-time which implementations of these
interfaces to instantiate. What is the best way to do this? Are there
any frameworks out there? Is there some design pattern for this?

How do i do  if-else  condition in Struts ?
logic:equal does not do it . how struts tag could be used in the JSP
page for an if-else condition ?
how  to do it ?

Hi all..
I'm getting an error when trying to compile an adaptation of my
HelloWorld program..
The code looks something like this: