on windows xp, trying to connect from a java client to an Oracle 9.2
database on same machine.  What should be the
DriverManager.getConnection() string?
Connection conn = DriverManager.getConnection(

Is there any way to know how many classes (JInternalFrame) are instantiated
in a runing program(e.g. Frame)?

Can someone tell me if there is any way of measuring the thread
utilisation of Tomcat using Java program? I am using Tomcat 5.0.19
thanks and rgds,
Prashant

We need to compress log files while they are being written out.  We put
in the GZIP output stream classes and at first look they work fine BUT
you have to wait a good amount of time before they start to write
anything out (the file size remains small).  After the stream gets a

does any of you know how to check the available space on a storage device
(eg a hard disk) through Java?
TIA
zero

I have the code below in a JNI interface routine.  If I run it as below (#if
0), then it does not leak memory.
If I change the #if 0 to #if 1, then it leaks - the JVM just keeps on
growing.

Hi. I'm about to write some notes for a university level Java
programming course, specialising in audio/midi applications.
I have quite a bit of experience in designing teaching materials for
programming courses in Java and other languages. However, one thing

I'm looking for a Java or Windows tool that I can run permanently on my PC and would perform some monitoring of my web sites hosted
by different hosters. I'd like to get uptime, response time, ...
An idea ?
Of course, free is better... ;-)

I've been trying to find a regular expression that will authenticate an
UTF-8 field in struts.
So far I have;
<constant-name>user_name</constant-name>

Assume that I have an application called "Generator", which generates some
output format, not necessarily XML. The output generated is going to be used
by the customer for uploading to a server. I cant change any part of the
application used by the customer, for example I cannot ...

I am a Java newbie, taking a class.  I have to write a program that
uses methods to a) read in students test scores and average them, and
b) return an equivalvent letter grade from that average.  My program
compiles fine, but when I execute it I get:

I have google and couldn't find any tutorial/examples on using
ConcurrentHashMap.
Suppose I have the following three scenarios, what should I do to ensure
thread-safety?

 jtable should provides us to select only one cell at a time. But it
doesn't, except you override some classes.
thanks
from Peter (cmk128@hotmail.com)

I am attempting to create a new instance of the class indicated in a
type param.
Here is little demo I wrote showing the problem (question below):
public class Foo

Ever since I installed JDK 1.5.0_05 ant seems to ignore anything on
the command line. it ignores -debug or targets.
The ant.bat file is unchanged. I have invoked ant.bat explicitly in
case one other ant.bat appeared on the path without success.