Apache Jakarta and Beyond: A Java Programmer's Introduction by Larne Pekowsky

By Larne Pekowsky

The Jakarta venture contains many strong open resource instruments for the Java platform, yet so much lack tutorials or transparent on-line support documentation. Apache Jakarta and past is the definitive consultant to utilizing Jakarta and different Java open resource instruments to improve internet purposes extra successfully and effectively.In this example-packed ebook, readers will findAn creation to the philosophy at the back of the Jakarta projectDetails on many ready-to-use Java toolkits, together with Ant, JUnit, Cactus, Log4J, POI, Tomcat, James, Struts, and moreIn-depth guidance on the way to enhance with a number of toolkitsA advisor to splitting paintings alongside strains of "what is offered" and "what needs to be written"Best practices for improvement, similar to the model/view/controller paradigmNumerous examples that could function templates for readers' personal tasks"

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The screenshots in this chapter come from the Linux/GTK version, which should nearly match the appearance on any Unix variant. Other platforms will all have the same controls and abilities but will differ slightly in details. 0 should follow shortly. In the meantime both the Linux/motif and Linux/GTK versions of Eclipse can be run on FreeBSD by installing the appropriate Linux Libraries and a Linux version of the JDK. More complete instructions appear on the CD-ROM. 1. [2] [2] The factorial of a number is the product of all numbers between one and that number.

View full size image] 62 63 Note that the task view at the bottom of the screen has been replaced by the output of the program. There is a problem with this output: The factorial of 10 should certainly not be zero! Although the program compiled cleanly and runs, it clearly has a bug. Fortunately Eclipse incorporates a debugger that can help find it. To use this debugger, first a breakpoint is placed in the program by double-clicking the appropriate line of source code in the editor. A breakpoint is just what it sounds like: a point in the program where execution will halt when debugged.

2 . ant package. All the potentially difficult aspects of writing a task are managed by either the Task base class or Ant itself with the help of some introspection. Task developers can concentrate on making their tasks perform the necessary actions. The entry point for a task is a method called execute(), which takes no arguments, and this is the only method that a task must provide. This method is called by Ant when the task is reached within a target. 4 shows the simplest possible task. 4. DemoTask"/> 41 42 which will produce the expected output when run demo: [demoTask] Hello, ant!

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