Category Archives: Java

Mac, you’ve got a friend in Java. Now be nice.

I have recently rediscovered the joy of programming in Java for desktop Applications. Mac OS X provides a perfect deployment system for Java applications since Java 1.6 comes standard, so you don’t have to worry about directing your users to download Java for your applications to work. What’s more, since your application is written in Java it can easily be adapted (and perhaps unchanged) to run on Windows and Linux. So what is so great about Java:

  1. It is multi-threaded from the ground up.

Although threads can be used in many other programming languages, Java presents by far the cleanest and complete implementation I have ever come across. The language is built for threads at its very core with locking and monitor capability on any object.

  1. Namespaces and packaging

Between Java’s rich namespace support and it’s native packaging JAR format Java allows you to build applications component by component with minimal hassle when it comes to putting the components together. Unlike interpreted languages like Ruby, Python, and PHP, you are able to build your sky-scraper of an application without worrying about the size of it affective the speed of it. When you’ve completed a library, you can package it up an wrap it in a bow and feel confident that this component will serve you well for many projects to come.

  1. Garbage Collection

Most of the time, honestly, I don’t want to have to worry about mundane details like deleting objects that are no longer being used. Garbage collection does add a bit of overhead to an application, but it is well worth it 99% of the time.

  1. Swing

Say what you will about Swing, but it still stands up as one of the most powerful and portable GUI toolkits available on any platform. With only a few lines of code you can have yourself a full-fledged application with the look and feel of the native operating system, and have it run on Mac, Windows, and Linux without the need for any form of recompiling. It gives you the building blocks that you need to have a rich application, and allows you to extend quite far also.

There have been some troubling trends over the past few years as they pertain to Java. New dynamic languages like Python and Ruby have gained a lot of attention at the expense of Java. Windows has stopped shipping with Java and the IPhone and IPad don’t support Java and likely never will. My website stats indicate that only about 85% of Windows user have Java installed – this is definitely less than 10 years ago when virtually all Windows machines were equipped with Java. If you do a Google search for “Java OS X” or “Java for Mac Desktop Apps” you’ll find a plethora of articles circa 2002. There is scarcely anyone talking about using Java on the Desktop in the past 3 years. Has everything worth writing been written, or is this just the writing on the wall.

I hope this does not foreshadow and end to the glory days of Java as a development platform on OS X. It would be tragic if, one day, Apple decided to leave Java out of the default install. That would force users to install Java before running any software dependent upon Java – which would make Java a much less attractive platform to develop on.


Ran across IFTPd ( and installed it on my westhost server.  This is great because I can run it on my virtual private server and create accounts for multiple users giving them access to exactly what they need access to.  It has a simple mechanism for defining groups and users, allowing you to create virtual file systems for the users and groups to work on. 

The default FTP daemon on my server was a little more difficult to work with, confining users to only their home ftp directory.  This is insufficient when there are multiple group projects under way.

IFTPd is also written entirely in Java and is distributed with all dependencies, so getting it running was a snap.

Still looking for a similar product for SSH, but for now, this works GREAT! 


Jakarta Commons FTP Client Deadlock problems

I have been experimenting with Java FTP components in my effort to create a JFileChooser component that will work over FTP. Common concensus seems to be that the best FTP component is the Jakarta Commons FTPClient class. It seems to have all of the necessary functionality, however seems to have multithreading issues. The component continually deadlocks, and I have narrowed it down to the FTPClient class. I found a post at that also talks about deadlocking in the FTPClient. One suggested solution is to disable the separate reader thread by calling setReaderThread(false). This helps me get a little further to the point where it usually works, but nonetheless deadlocking still occurs.

I will keep on searching for another FTP component but in the mean time I have successfully adapted JFileChooser to use SFTP (Secure FTP) using the SSH Tools libraries.


Hessian Web Services

I just ran across a great little library for web services, called Hessian. It is a binary web service (ie not xml) so its messages are much more compact and easier to transfer. In addition, the client and server libraries don’t require nearly as large a framework. It looks really easy and there are libraries to support Java, Python, and PHP — and maybe a few others that slipped my mind.