Re: Experienced RPGLE developer to finally learn Java

Wow guys. Thank you all.
So many different suggestions.
Best groups ever here on midrange.com

I think it is obvious I need to forget about rpg concepts or ill set myself up for an even better challenge learning java. If I am to get the most of it, I think learning java in a windows environment then moving what I’ve applied to the I will provide the most well rounded education... as someone suggested.

Thanks again
Jay

Sent from my iPhone

On Oct 17, 2019, at 5:57 AM, D*B <dieter.bender@xxxxxxxxxxxx> wrote:

<Jay>
As a small intro, I have been on the IBMi platform (and predecessors) for
well over 20 years now.
I am very proficient at RPGLE and DB2 SQL.
I understand ILE concepts well.
<snip

This might help, but only a little. Java is very diffrent from RPG and the most important diffrence is OO versus procedural. Besides this Java has lots of standard components and writing Java applications is mostly using and combining already existing components.

</snip>
I am looking for best online resources to begin learning java on the
platform.
<snip>

Java is independent of platforms and beginners shouldn't think abaout platform issues. Good intros you would find here:
https://docs.oracle.com/javase/tutorial/
but there are many other good offers.

</snip>
I began looking at visualAge but it appears it is no longer supported and
was wondering if RDI is an adequate IDE for java on the i.
<snip>

Visual Age has gone long times ago and that's good! Today Eclipse is mostly used. In my Java courses I preferred JCreator. It has a smaller footprint, it's easier to start with and doesn't hide basic problems (classpath, compile environment ...) from the beginners.

</snip>

I best learn by example and comparing an rpgle pgm to a java pgm example
would be most appealing.
</Jay>

RPG is only a subset of Java and comparing a rpgle programm with a Java programm would end up in writing RPG logic in another language. RPG is a good fit for RPG thinking programmers. Writing good Java programms you would have to learn thinking in Java. Books like Java for RPG programmers don't help learning Java, this aproach will slow down the process to become a good Java programmer.

D*B
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