Object names in the Java Object

KevinViel — Tue, 10 Jul 2018 14:11:27 GMT

In many examples, the object-reference (name) of the Java Object (javaobj) is one letter, often "j", "f", or "m". For example:

SAS® 9.4 Component Objects: Reference, Third Edition

Pg 78

/* DATA step code */

data _null_;

dcl javaobj j("ttest");

length val 8;

length str $20;

j.setIntField("i", 100);

j.setDoubleField("d", 3.14159);

j.setStringField("s", "abc");

j.callIntMethod("im", val);

put val=;

j.callDoubleMethod("dm", val);

put val=;

j.callStringMethod("sm", str);

put str=;

run;

Is this just convenience or is it meaningful? I would tend to name it as informatively as possible, potentially with something like "__jo_" so that I can read my programs/logs with a program and find which used them.

However, if there is a reason, then less typing is always good 🙂

Thank you,

Kevin

Re: Object names in the Java Object

ybolduc — Tue, 10 Jul 2018 16:52:12 GMT

Personnally, I suspect it is just to save a bunch of keystrokes. Same reason I often use i, j and k as iterators when their "meaning" is very obvious.

Also, short variable names have the benefit of considerably reducing the risks of typos...

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Object names in the Java Object

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