I am wondering whether Java has asynchronized I/O (whether built-in core
Java SDK or 3rd party release), which is similar as select or poll in UNIX.
Current read/write will be blocked when underlying stream is not ready. For
example, when retrieving data from remote machine, we will ...

in a method i'm writing, i'd like to test for null elements in an
arbitrary set.
if the set contains a null element, i want to throw a NullPointerException.
rather than examining the elements myself, though i'd like to use the

I am trying to make a simple calculator for the web by using sessions.
When accessing the .jsp-file for the first time, the user will see:
----
Welcome to the calculator

Just a warning. This may be a little weird:
I don't have the opportunity to test an applet on Mac OS X, but there
are complains about a certain error occurrence.
When the applet is loaded an exception is thrown with the error message

I tried to define a class and use it in my JSP page, but i'm running
into some problems...
here is the JSP code:
=============================================================

I'm still sorta new to Java, and so don't have a great understanding of it
so sorry if the answer to this is painfully obvious.
What I'm trying to do is to open a txt file, but only have the first line
of it read into a text area I have.

i'm trying to handle incoming phone calls placing some code to pauseApp, but on Siemens CX65 it did't works
is it device specific?
is there some example of how to properly handle that situation?

I am very much a beginner at java programming, and
this my first problem that I have not been able to
resolve via the Sun documentation.  Those docs
describe an "import static" construct which would

I need hlep with a program that calculates prices for a movie theater based
on the seating arrangement at a single movie show. I was able to set the
two dimensional array but I am having trouble adding up the movie tickets
seatings. There are five different types of tickets. Seat A ...

I'm having issues with a file I/O assignment for my Java class.  This
program's supposed to copy the contents of one file (specified in a
command-line argument) into another file (also specified at command-line).
I've created file objects for the program, as well as FileReader ...

I don't really like how Java2 default font is bold.  I think the plain
looks much better.
How can I set the default font for a JLabel or for the whole program.
I would like to change it from BOLD to PLAIN.

I am trying to record a path in a recursive depth first search.  What I
want to do is:
each time I recurse, find the list of the next edges to follow (works
fine)

I must make a simple database for project,I designed catalog and page
structure but I have no experience about java i/o ,can someone tell me
how it append byte into file without erasing
I found some example but It only converts strings to byte and append it

Recently I upgraded from 1.4 to 1.5. Now I got a strange font trouble.
It seems like each line gets double height reserved and then the text is
only written in the upper half. See for example the "Avbryt" (cancel in
English)-button in the standard file dialogue here

I am working on my first program and I have a question about variable
scope and good programming practice.
I have an initial class where I have a 4 arrays of data.  From there I
have a couple dialogs and frames that are used to enter or manipulate