I have application code that runs fine when executed from inside
Eclipse IDE.
However when I make a jar "myApp.jar" out of it then the jar does not
run. If I however remove a certain object of a certain class C from my

I think this thread can also provide some insight to beginners. I came
across a very good website that lists many tutorials on java -
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Look into computer languages >> Java>>Core java

I'm developing a web application using tomcat 5.5.
I can execute Jsp pages in my application, but when I try to execute
servlets I simply cant execute them
the error shown is: Requested resource is not available.

I have a jsp that checks which clients that are connected. This works
well! When I from a browser loads the jsp page, information about how
many clients is connected is presented in the browser and also
appended to a logfile on the Windows 2003 server machine.

Most of you might know that serialization is required when you want to
do some I/O operation.
Why not all objects are by default Serializable?
Read the below page to understand the design consideration behind the

String value="";
if(value.length() == 0) {
           char data[]=new char[count];
           for(int c=0;c<count;c++){

I'm writing a videogame emulator in Java, that'll run in a applet.
The process I use to draw the image in the applet is the following:
1. The emulator process its data. During this processing, the video
card is drawing to the "TV set", which means the emulator is drawing

I commissioned a Java Web Start icon for public use from Ahasoft.com,
e.g. to mark JNLP files in listings, to mark JNLP links, to decorate
esssys about Java Web start. The artist has given me three designs to
choose from:

When I ran a web application, JVM spit out a message below... But, I
don't know the exact problem...
I thought that the line, " at
com.wm.jdf.portfolio.PortfolioAnalysis.getPortfolioYieldRisk(Unknown

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Hi .. im working under SOLARIS, and i have this problem,....
when i write file = new File("/sgcv10/test","testing.xml"); and then i
do
file.getAbsoluteFile(); -> this shous me /usr/bin/ /sgcv10/test/

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Helo,
I need to divide Integer value by 2. Is it only one method to create
new Integer? Looks cumbersome.
Integer i = new Integer(10);

This is a question on architecture.
In java we have two options on how to implement event handling
mechanism.
* First is to subclass AbstractAction, define all action handling