I have a situation whereby I may have to change a key in a HashMap. Is there
a better way to do this than to obtain the object associated with that key,
put() a new entry in the HashMap with the old object and the new key, then
delete the old HashMap entry? TIA, Ike

Why would a .jar file not startup if a key was set in
HKLM\Software\Microsoft\Windows\CurrentVersion\Run
The location is correct...I have even tried to convert it into an exe
using Launch4j and it wont start using a registry key..

Lets say i have this method
int foo() {
 try {
      do something;

Help, there's a bug in my thread.  The stud keeps winning.
public static void main(String[] args) {
  AFCCG championship = new AFCCG();
   Thread stud = new Thread(championship);

as I found, java.awt.GeneralPath is not further backward compatible
from Java 1.6+ since
public final class GeneralPath implements Shape, Cloneable {...} (1.5)
changed to

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Hi I'm developing an application using RMI Technology but now I've a
little logical problem.
The structure of my application as a Server and two type of client: a
ManagerClient and a UserClient.

Alright this is the deal.  The class will compile but when I run it I
receive
java.lang.NoSuchMethodError: main
Exception in thread "main"

I am new in this, please help.
Is ant the right way to compile and jar for java?
After I build the build.xml for compiling, what command should I use
for building entire tree?

Does anybody know of a good online tutorial that deals with RMI.  I
have some Java experience but very little networking experience.

I'm reading the http://java.sun.com/docs/books/tutorial/java/TOC.html
tutorial and I'm passed interfaces, but I can't figure out what's so
good about them. If I wanted to make all the methods, why don't I just
make them instead of implementing an interface that seems to add

In last semester, I wrote a program for algorithm analysis class. It
was critical to make the program to run as fast as possible. My first
approach was making custom classes that can represent the required data
model for the given  problem. But, the program ran extremely slow with

i wanted to know how can we call a class' constructor from within the
same class, without creating a new object.
actually i have to refresh the whole thing that happens from the
constructor.

I downloaded the Sun product, and find it feature rich but slow. Can someone
recommend a more basic (freeware) IDE which will help a newbie without
hiding every bit of code? I can program my way out of a wet paper bag in a
few languages, but want to by-pass some of the learning ...

I am utterly confused. I'm used to programming in Python where I'm
coddled with a gratuitous array of string methods and uses. They even
had a way for input that wouldn't take more than a minute to learn. But
I'm beffudled at how I can't make this simple conversion that I need to