Organization of BC4J – Domain (EO) and Business (VO) package
A topic that seems to come up again and again is the issue of reusing BC4J packages across applications and projects. And along the same lines structuring the BC4J …
Category: Java
JBoss Joins Eclipse
From Eclipse News: JBoss Joins Eclipse, Releases Application Server 4.0 Open-source firm JBoss recently unveiled the release of Application Server 4.0 and detailed an alliance with the Eclipse Foundation. …
I18Nized Buttons with AccessKeys in Struts applications
Some time ago I wrote a post on HTML Buttons which are accessable using keyboard shortcuts. (alt-s for a save button for example). In the solution I proposed I …
Tiger (Java 5.0) Variable method arguments
In Java code you have to use arrays a lot if you want to pass a variable number of arguments to a method. The main method is an excellent …
Spacer for JHeadstart Generation
During the JHeadstart workshop I am teaching this week there as a question: How can I – in a two-column layout – force two adjacent fields to be positioned …
Tiger (Java 5.0) Generics, auto (un)boxing and new For loop
Knowing that I will not be the only one posting on these features in the Java Tiger release here are some observations I made while running some tests. I …
HttpUnit 1.6 Released
From this thread on The Server Side: HttpUnit 1.6 released. HttpUnit 1.6, the first new production release in over a year, is now available. HttpUnit emulates the relevant portions …
A single POJO persistence model to replace JDO and take over much of EJB??
Java and persistence are hot. And continue to be hot. If I read things correctly, Sun – through Linda DeMichiel and Craig Russell Specification Leads, JSR-220 and JSR-243 – …
Java 5.0 (Tiger) – MetaData and Annotations – Introduction and thoughts on application
I have given the meta-data features in the J2SE 5.0 Tiger Release some more thought. Reading – in this order – through the following articles, I rather quickly had …
Craig McClanahan Blog
Craig McClanahan of Struts and JSF fame has started his own Blog. Let us add it to our roll..
Java 1.5 == 5.0 ==Tiger is loose (Sun releases J2SE 5.0)
All the news etc. starts here: J2SE 5.0 Home For new features see here (new features). and here (release notes). Then there is the article: Java 5.0 in a …
Using Struts' nested indexed properties in a form with table-layout
It looks like trying to use Struts’ nested indexed properties in a form with table-layout, with every line (a few formfields) as an editable separate entity, has driven a …
Struts, JDBC and Data Guard – Oracle Open World Amsterdam – Friday 24th September – Impressions
In this post I will tell you about some of the sessions  notably on Struts support in JDeveloper, Java/JDBC support with Oracle 10g and the Data Guard option of …
Eating your own dogfood – use of Oracle Development tools within the Oracle Applications development group
During the Amsterdam stage of the Oracle Open World Tour, I had a great opportunity to interview John Wookey Senior Vice President, Applications Development at Oracle Corporation. John is …
ADF documentation
In between sessions on Oracle Open World I visited the demogrounds. In one of the booths Duncan Mills was demonstrating Oracles ADF framework in JDeveloper 10g. IMHO the documentation …
BPEL is great and so is Oracle BPEL
Probably many of you have at least a vague notion of what BPEL (Business Process Execution Language) is all about. Now, thanks to a very good presentation by Oracle’s …
Struts + XDoclet (webdoclet) and integration with Eclipse
XDoclet is a tool that proclaims the DRY (Don’t Repeat Yourself) principle: you code everything in one file once, as opposed to the practice of modern software development, where …
Better Faster Lighter Java
This probably is one of the best books (on Java that is ;)) I’ve read in years. The book addresses the growing complexity Java designers & Developers face these …
Report knowledge center meeting on (J)Unit tests
Yesterday a presentation was given on unit testing during an Amis (Web) Knowledge Center meeting. The aim was to introduce the JUnit framework and related technologies such as DbUnit …
HTML Buttons with an image
In HTML it is possible to define an accesskey for a control. For example if you want to have a button which the user can click using the hot-key …
Hibernate + Middlegen Roundtrip Development applied
In Hibernate Roundtrip Development, a scenario is presented to generate (Hibernate) POJO objects from a (legacy) database, also known as a bottom-up approach: We applied this strategy to a …
Easy toString/equals/hashcode
A simple, standard and reusable way of creating toString, equals and hashcode methods in your classes/beans can be found in the jakarta commons.lang package: import org.apache.commons.lang.builder.EqualsBuilder; import org.apache.commons.lang.builder.HashCodeBuilder; import …
New Oracle JDBC driver
After getting a weird NullPointerException using Transaction.commit() in Hibernate during an insert (eventually calling PreparedStatement.clearParameters() which was the source of the exception), it turned out that the JDBC driver …
Image buttons in Struts (using ImageButtonBean class)
Basically, the recipe for using image buttons using the Struts tag library can be found on this page at j2ee.lagnada.com and this excerpt uit Ted Husted’s book Struts in …
Hibernate kickstart
A quick’n dirty tutorial-by-example for Hibernate: (Using one table, an Oracle9+ database and Hibernate2) 1) download the Hibernate distribution 2) put these jarfiles in /WEB-INF/lib: hibernate2.jar (hibernate core) cglib-full-2.0.2.jar …
Multiple-level nesting with <logic:iterate> in Struts
I expected multiple-level nesting with the <logic:iterate> tag in Struts to be difficult, but on the contrary it turned out to be an almost trivial exercise.
Some Hibernate links to get started
Some links to get started with Hibernate: Quickstart with Tomcat "Hibernate Your Data" – ONJava Quickstart Configuration Properties Hibern8IDE
New open source databases: Cloudscape (Apache Derby) and Ingres
Recently, IBM announced the open-sourcing of their Cloudscape database. a lightweight, Java-based relational database with a footprint of just 2MB. It’s significantly less resource-intensive than enterprise databases like IBM’s …
Use JAX-B or Castor for document-style encoding?
For my Open Source project, I want to expose a stateless session bean (SLSB) as web service using JBoss 3.2 and Axis 1.1. Now I’m wondering whether to use …
Ant Javadoc task and Eclipse
I was working on a Ant build file which includes a doc task generating the Javadoc for our project. Running the task from the command line worked just fine. …
Expert Session on Persistency Framework: Toplink
Yesterday we had an excellent meeting on Java persistency frameworks, in particular Toplink. Oracle Consultant and Java expert Peter Ebell presented on his experiences with Toplink on a very …
Great document on Java/J2EE Guidelines
I found a very interesting document (300 pages) with standards on Java/J2EE guidelines, Technical Paper: Java – J2EE Conventions and Guidelines Release 1.0.2 Stephan Janssen The JCS Team (2004). …
JMS do's and don'ts
While studying JMS, a friend suggested the JMS Application Architectures article to me, written by Roland Barcia. This article presents and discusses various JMS concepts (such as state versus …
Struts 1.2.1 and ADF
For those who can not wait to try the Struts 1.2.1 beta version in combination with ADF in JDeveloper10g, Duncan Mills has posted a “how to” on OTN. click …
EJB threshold
Years ago, i believe Q4-2000, we made a website that almost from the day it went live had to serve some rather heavy content with 30.000 hits a day. …
EJB 3.0 info on JavaWorld
Since we are comparing O/R tools here, the EJB 3.0 developments shouldn’t be missed either. EJB 3.0 in a nutshell, An overview and critical analysis of the latest EJB …
O/R mapping tools – comparison
For a very extensive comparison between seemingly all the O/R mapping tools known to mankind check this wiki page. Perhaps a relevant observation: despite the zealoting, Toplink, OJB and …
Interview Bruce Tate
A very good, thoughtprovoking interview on EJB3, lightweight containers and AOP with Bruce Tate (author of Bitter Java, Bitter EJB and his latest, Better, Faster, Lighter Java) can be …
Eclipse webtools
The Eclipse webtools subplatform is live, with two initial code submissions from Lomboz and IBM. More info here. The submission by IBM is looking _really_ good: it’s like a …
Sequence beans: auto-increment of primary key fields
An auto-incremet of your primary key field whenever a new record is inserted, is a feature commonly found in many databases (e.g., the auto_increment of MySQL, the identity field …