I make a simulation using IDE NETBEANS but there is a warning: Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
on source code :

if(!mapRouter.containsKey(routerA))
addRouter(routerA);

Anybody know how to finish it?

What are the effects of a computer' Clock Rate on the execution speed of instructions?

Does anyone has an idea?

Hello Experts! I need to write a program that will evaluate the difference in implementing times between integer and floating point division. As an output for testing the program, the operation should be implemented a hundred thousand times and then try to equate the difference in running time. The program must be in C++ Programming Language and the codes should be complete and running correctly. Thanks.

How can I change the window output in the C programming provided that I wish to make the window full screen without using its properties and just through codes?

how to hide partitions without using softwares of any kind.do anyone know here?

How to install windows 8 developer preview from USB device.

I heard it works but how I don't know.

What's the use of Appserv or XAMPP on making dreamweaver and sql unite? What other software aside from Appserv or XAMPP can make relations of the two?

Hello,

I need to know about debug process/debugging. I have heard of this process and so far I have heard this is a useful process to keep your computer safe but I do not know where to go and what to do in order to use this process let alone using it. So I need to know the basics about this debugging process. Please do help me solve this problem.

Mickey Nixon

hello ,

please i have problem when i want to make relation between dreamweaver and my sql .. always have msgbox said that there is no database .. 

help me please .

thanks

I really wonder about this, because Visual Basic 6.0 was released before Microsoft Access 2000 and I used Microsoft 2007 and 2000. When i try to connect it, I'll get a message saying that "invalid database format". Does somebody has an idea about this?