As of the Java Servlet specification version 2.3, a component type, called a filter, can be used in your Java web applications. A filter dynamically […]
Database, Oracle, SQL
Catching errors in Oracle
Sometimes there is a need to find out exactly which Oracle errors are occurring in your code, because your application stacktrace or your log files […]
HTML, Javascript, JSP
A complete AJAX example
There are several third party libraries that simplify the programming that is needed to make your web pages communicate with the server more dynamically, and […]
Java
Java Programming Tips
Tip #1 – Avoid NullPointerException situations When comparing strings against specific values in Java, you can easily avoid the java.lang.NullPointerException problem by specifying the string […]
Database, Oracle, SQL
Order of predicates in WHERE clause
It is often assumed that the order of the predicates in the WHERE clause of an Oracle SELECT statement does not matter or that it […]
Database, Oracle, Regular Expression, SQL
Regular Expressions in Oracle
Regular Expressions (RE) are a powerful feature in Oracle. I have found them to be most useful for situations where you need to quickly find […]