CODEWITHSUNDEEP
javaeclipseobject
mtk
mtk

Reputation: 13707

What are %I% and %G% identifiers in Object class javadoc?

Just out of curiosity.

When I hover over Object word in eclipse, the doc shows the below info. I would like to know what the Version represent.

This does not appear on the online oracle javadocs http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html

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Also, futher checking Object class, the very intial comments show %W% %E%. I would like to know what are these identifiers for?

Upvotes: 2

Views: 330

Answers (2)

tofcoder
tofcoder

Reputation: 2382

It seems that Java Software used SCCS, which is an (old-fashioned!) source-code version control system, like git, Subversion or Perforce.

If you put "%I%, %G%" into a text file and then store that file in SCCS, when you check it back out, SCCS will expand the text to the file version and date. This is always present in Javadoc instructions such as in the footnote of How to Write Doc Comment for the Javadoc Tool

Upvotes: 2

JCW
JCW

Reputation: 222

Those come from SCCS (Source Code Control System), the SCM Sun used to use. When a file was checked in %I% would be converted to the version of the file and %G% to the date the file was checked in. If memory serves correctly Sun moved to Mercurial around 2007 or so, so I don't think there's much danger of these getting updated!

%E% was the date (in yy/mm/dd format, where %G% was mm/dd/yy). I don't know about %W%!

Upvotes: 2

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