Sifting Through the Java Quagmire

September 8, 2004 Kevin Vandever

Four Hundred Guru has published a range of articles on the Java language. As much information as we’ve provided, however, I still don’t think we’ve solved the Java mystery for many iSeries professionals. I still hear the how, when, and why questions from many of you out there. So I’d like to take a step back and provide some high level answers to these questions, so you can sift your way through the quagmire to what you really need to understand.

The reason for so many questions from the iSeries community is not that we are incapable of learning Java

Define Compile-Time Array Data in D-Specs

September 8, 2004 Hey, Ted

For performance reasons there are certain tables that I would prefer to implement as compile-time arrays rather than as physical files. But I don’t want to hard-code the compile-time array definitions in each RPG program that uses them, since that would require manual modification of each program if an array’s definition or data changes. Loading each array from a file at program startup is also an option, but I’d prefer to avoid the unnecessary I/O. I came up with a method to store compile-time array definitions in a copyable source member, but it has one little problem.

Here’s my idea.

CRTDUPOBJ and Logical Files

September 8, 2004 Hey, Ted

I want to build some test libraries from my production libraries. I am having trouble duplicating logical files that are stored in one library but point to physical files in another library. I thought Create Duplicate Object (CRTDUPOBJ) would create a logical in one test library but point it to another test library if the library list was set correctly. What is the best method to copy logical files and point them to the correct physical files?

–David

You have to be careful when using CRTDUPOBJ with logical files. Which physical file the new logical file is based on depends