Java MySQL database tutorials and examples

Over the years I've done a lot of Java programming, including Java database programming, and I've tried to document a lot of what I've learned about database programming.

A very long time ago I wrote these generic Java database programming tutorials:

Drupal 7 PDOException Unknown MySQL server host

I just ran into a situation of getting a Drupal 7 "PDOException Unknown MySQL server host" error message while running Drupal 7 on a GoDaddy server. The full Drupal 7 error message looked like this:

Java String format examples

A few days ago I was reminded of the Java String format method, and the ability to use printf syntax with this format method, so I thought I'd share a quick example of it here.

Here's a quick look at the String class format method syntax, which demonstrates the power and simplicity of this "Java printf" syntax:

Java String array examples (tutorial)

Java String/array FAQ: How do I create an array of Strings in Java (i.e., a Java String array)?

I wrote this article because I can never remember the Java array syntax myself, so I use this page as a reference. There are a couple of ways of declaring and using Java String arrays, and I'll try to cover those in this article.

1) Declaring, sizing, and using a Java String array

The first way to use a Java String array is to (a) declare it in one step, and then (b) use it in a second step. Within a class, you declare a Java String array like this:

Sencha Touch 2 (mobile app development)

I have a small amount of free time after writing the Scala Cookbook, so I'm working on a mobile app (iPhone, iPad, Android) for a friend using the Sencha Touch 2 framework. It's a beast of a framework to get started with, mostly because the documentation is very poor, but what it does is very good, so I'm pushing on.

Scala Cookbook eBook - 1/2 Off (today only)

The Scala Cookbook eBook is half-price, today only, courtesy of the O'Reilly "Deal of the day". See the following link for more information:

I'll update that link throughout the day with more information.

All the best,
Alvin Alexander

Play Framework Recipes (from the Scala Cookbook)

Just a quick note today that I just released a free PDF booklet titled, “Play Framework Recipes”.

Good Scala programming resources (i.e., how to learn Scala)

Just a quick note here today (March, 2013) that if you're interested in learning Scala online, the following links provide some of the best educational experiences:

Over 150 Scala programming tutorials

Just a quick note today that in a few days I'll pass a little milestone, and have over 150 Scala programming tutorials on my website. This is in addition to my Scala Cookbook, which will be released soon.

In related news, Scala 2.10 was recently released. Here's a link to What's New in Scala 2.10 on the official Scala website.

On software productivity and generating CRUD code

As a past and present small business owner, computer programmer, application designer, and a consultant who gets paid by the hour, my primary interest when creating software applications is this: How do I/we create great software applications as fast as possible? That is, how can we be more productive today than we were yesterday?


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