Hierarchical queries using the Oracle RDBMS
This article describes how to execute hierarchical queries for a tree structure using the Oracle RDBMS.
Executables within the JDK and JRE
This article lists and briefly describes the various executables which can be found in an Java JRE's or JDK's bin directory. For some of the more interesting tools, screenshots and simple usage examples are also shown.
Overview of Oracle Platform Security Services
This article shows the structure of the Oracle Platform Security Services and gives some code samples to show how clients can use the JPS API.
Overview of the ADF security model
This article describes the different artifacts which are used to specify the access rights in an Oracle ADF application. This is basically a high level overview of the data stored in the src/META-INF/jazn-data.xml file.
New features in Java 8
This article describes some of the new features in Java 8, like Lambda expressions and Virtual Extension Methods
Using strong encryption in Java
This article shows how to configure a Java JRE to use unrestricted cryptographic algorithms.
WebLogic logging configuration
How to configure logging in standalone Weblogic server 11g on Unix
Creating Java stack traces
This article shows different ways how to create a stack trace from a running Java Virtual Machine, and explains two command line programms to create the stack trace for the Sun JVM and the jrockit JVM.
Introduction into functional programming
This article gives an introduction into functional programming and explains lambda expressions and closures.
Java 7 feature: try-with-resources
This article explains one of the new Java 7 features, the try-with-resources statement.
Order By Performance
Some basic investigation on the performance impact of using ORDER BY in SQL queries.
Character Encodings
With internationalisation and localization becoming more and more important, it becomes also more and more important to know how operating systems and programming languages handle multi language texts. This article gives an introduction to character encodings and how they are supported in different languages. The article is currently still work in progress but already provides...
Electronic circuit simulation with NG-SPICE
I recently spent some time to learn how to use the open source Electronic Circuit Simulation program ng-spice. This article contains an introduction into this application and how to use it together with the open source package gEDA (GPL electronic design automation). Some example circuits are also provided.
Configuring Linux with initial ramdisk support
Ever wondered how you can make the static part of the linux kernel as small as possible? Many distributions do this in the background, but this article gives some hints how this can be done manually.