Posted
by kunjaan
on Stack Overflow
See other posts from Stack Overflow
or by kunjaan
Published on 2010-04-25T05:57:38Z
Indexed on
2010/04/25
18:53 UTC
Read the original article
Hit count: 139
What is null?
Is null an instance of anything?
What set does 'null' belong to?
How is it represented in the memory?
© Stack Overflow or respective owner
as seen on Server Fault
- Search for 'Server Fault'
I'm trying to setup a tomcat6 server, and I'm trying to match another setup someone else established. However, my deployment (default Ubuntu install) uses a policy.d/ directory structure, and the established server just uses a catalina.policy file. I've tried setting every entry in policy.d to match…
>>> More
as seen on Stack Overflow
- Search for 'Stack Overflow'
I am not able to create a Queue connection in JBOSS4.2.3GA Version & Java1.5, as I am using MDB as per the below details.
I am putting this MDB in a jar file(named utsJar.jar) and copied it in deploy folder of JBOSS, In the test env. this MDB works well
but in another env. [ env settings and…
>>> More
as seen on Stack Overflow
- Search for 'Stack Overflow'
Hi,
I am using Postgres and gwt 2.0 for one of my applications. I am facing problem connecting to the database. When I try to connect it gives "ClassNotFoundException". Here is what I get when I try to connect to database:
java.lang.ClassNotFoundException: org.postgresql.Driver
at java.net…
>>> More
as seen on Stack Overflow
- Search for 'Stack Overflow'
Hi,
For i am using postgre and gwt 2.0 for one of my applications. I am facing problem connecting to the database. When i try to connect it gives "ClassNotFoundException". Here is what i get when i try to connect to database:
java.lang.ClassNotFoundException: org.postgresql.Driver
at java.net…
>>> More
as seen on Stack Overflow
- Search for 'Stack Overflow'
Hi, I'm trying to migrate an application running on JBoss 4.2.2.GA to JBoss 6.0.0.M2
I give you some log to explain my problem :
boot.log :
2010-03-16 09:59:29,406 ERROR [org.jboss.system.server.profileservice.ProfileServiceBootstrap] (Thread-2) Failed to load profile: Summary of incomplete deployments…
>>> More
as seen on Ask Ubuntu
- Search for 'Ask Ubuntu'
As the title says, I'm having trouble with a very noisy audio input device - the internal mic or any plugged in mics.
So far I've narrowed it down to an problem in ALSA since my debug info is showing a lot of "null" values. Can anyone help?
Debug Info: http://www.alsa-project.org/db/?f=e0c6fb7e10624bf7691aa2b405cf0d3968e56c63
Exert…
>>> More
as seen on SQL Blogcasts
- Search for 'SQL Blogcasts'
Tuning takes many routes and I get into some interesting situations and often make some exciting finds, see http://sqlblogcasts.com/blogs/grumpyolddba/archive/2010/05/17/just-when-you-thought-it-was-safe.aspx for an example. Today I encountered a multitude of Foreign Key constraints on a table, now…
>>> More
as seen on Stack Overflow
- Search for 'Stack Overflow'
I have few queries and am not able to figure out how to optimize them,
QUERY 1
select *
from t_twitter_tracking
where classified is null and tweetType='ENGLISH'
order by id limit 500;
QUERY 2
Select
count(*) as cnt,
DATE_FORMAT(CONVERT_TZ(wrdTrk.createdOnGMTDate,'+00:00','+05:30'),'%Y-%m-%d')…
>>> More
as seen on Stack Overflow
- Search for 'Stack Overflow'
I need your help!!!.
I need to query a table in my database that has record of goods sold. I want the query to detect a particular product and also calculate the quantity sold. The product are 300 now, but it would increase in the future.
Below is a sample of my DB Table
#----------------------------
#…
>>> More
as seen on Stack Overflow
- Search for 'Stack Overflow'
When doing null checks in Java code, and you throw IllegalArgumentExceptions for null values, what kind of message template do you use?
We tend to use something like this
public User getUser(String username){
if (username == null){
throw new IllegalArgumentException("username is null");…
>>> More
