I am writing a method to check for colons in a String, if a String appears
it must be replaced with '::', however, I am having trouble checking whether
each individual character is a colon.
My first attempt was

I'm trying to name some buttons, by using an array that I have already
made.
Here is the Constructor of my current array;
public Mobile (String mobname, int talktimein, int standbyin, int

I've written an applet. It properly works with Mozila. But with
Internet Explorer it says "Class [the applet's name] not found" or
something.
What is the problem? How can I fix it?

hye,
i am running applet on ie .In the applet i want to open file chooser.
but there is exception.
i made changes in java.policy.

The following program as I have stated in previous
posts scribbles in different colors and clears all
the colors in a panel. I still haven't gotten it
do one last thing to clear the last line drawn.

Yesterday I downloaded the latest JAVA SDK (aka JDK)
    jdk-1_5_0-windows-i586.exe
and installed it according to the instructions.
I am running XP - Professional.

Following a piece of code that basically works fine except for one small
occasional error.
From time to time it throws a java.net.ConnectionException error.
As such this is not to big an issue were it not that it runs 24/5 and i

hi, experts
i am writing a login servlet for my app
as you guys expected, i use the PrintWriter stuff (all out.println()
statements as my focus is not in jsp)

HELP ME! I'm a beginner!
I'm looking to round a double into two decimal places. I have looked
through MANY FAQ's and keep getting reffered to the documentation.
Sorry if I'm being dumb but It makes NO SENSE at all to me!

 I have a problem to run my JSPs.  After having read a part of the
Tomcat documentation, I discoverd that a JDK or JRE environment
variable must be available.
Java location: The installer will use the registry or the JAVA_HOME

Is it appropiate to use classloaders in factory methods.  For example,
say you write a factory to instantiate implementations of an interface,
ExampleIF.  Would this be appropiate:
public class ExampleFactory {

If I use File.deleteOnExit() on a file, I know if the JVM exits normally,
the file will be deleted (if permissions are right, file is not in use by
another JVM or program, etc.).  But what if the JVM crashes?  How reliable
is it then?  I know if the system loses power, or the OS ...

Hello I`m fairly new to programming and am working through head first java.
For a project i started i wanted to write a random number generator.
Sort of a dice roller realy. and encounterd the following.
in the next code the intRandom method always returns 1 That is 0 + 1.

actually i think i can't grasp the concept of session
what's the difference between session and cookie?
how a httpsession object saves the info?(save in server? or client? in
the form of cookie?)

Did somebody write some fine program in java  for database oracle(or
diffrent database) like  library, etc...,
and can get it for me.
Thank you  for any info.