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Joe Winchester

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Top Stories by Joe Winchester

Essential to the development of complex systems are tools that help the developer locate, analyze, and fix problems. Debuggers provide support for this by letting a developer inspect the internal state of a program at runtime, as well as suspend and resume execution statement by statement. The originators of the Java programming language defined a debugging architecture, but since its conception Java has advanced into new areas of deployment topologies and optimization technologies that present a further set of problems. This article covers some of the background behind these issues as well as the activity in the Java community to provide solutions. Examples of debugging solutions are drawn from the IBM VisualAge for Java integrated development environment (IDE), al-though the issues are applicable to other environments as well. Debugger Basics Java source code is w... (more)

Doubtful Diagrams and Far Out Figures of Web 2.0

In a recent presentation I attended, the speaker warmed up with a couple of bulleted lists that outlined the agenda of the session before moving onto his third slide that was clearly many days, work of stitching together powerpoint glyphs and figures in a sort of three dimensional loop that attempted to show the progression of software APIs around the evolution of networked computing. It was utterly baffling and the more I stared at it, the more I felt I was looking at some kind of latter day Escher drawing. I gazed around the room and saw most of the other attendees on their lap... (more)

SWT - A Native Widget Toolkit for Java Part 1 of 2

The Standard Widget Toolkit (SWT) is a Java class library that allows you to create native user interfaces. It's designed to provide efficient, portable access to the underlying facilities of the operating system on which it's implemented. SWT uses native widgets wherever possible, giving an SWT program a native look and feel and a high level of integration with the desktop. In addition, SWT includes a rich set of controls such as tree, table, and tab folder. This article introduces SWT by describing some of the basic concepts and classes. Hello World: A Simple SWT Program The e... (more)

XML Serialization of Java Objects

Java serialization was initially used to support remote method invocation (RMI), allowing argument objects to be passed between two virtual machines. RMI works best when the two VMs contain compatible versions of the class being transmitted, and can reliably transmit a binary representation of the object based on its internal state. When an object is serialized, it must also serialize the objects to which its fields refer - resulting in what is commonly called an object graph of connected components. Although the transient keyword can be used to control the extent to which the s... (more)

Turkish Java Needs Special Brewing

On a recent trip to Turkey to meet with a customer, I heard a comment that one of the reasons Java is being held back in that country is because of an almost ubiquitous local bug. In the Turkish alphabet there are two letters for "i," dotless and dotted. The problem is that the dotless "i" in lowercase becomes the dotless in uppercase. At first glance this wouldn't appear to be a problem; however, the problem lies in what programmers do with upper- and lowercases in their code. The two lowercase letters are \u0069 "i" and \u0131 (dotless "I") and are totally unrelated. Their uppe... (more)