<Swing Dev> [9] RFR JDK-8159068:The rendering of JTable is broken

[prasanta sadhukhan]

Hi All,

Please review a fix for jdk9 where it was seen that if we try to select 
some rows in a JTable, the text painted in the rows goes missing.

Bug: https://bugs.openjdk.java.net/browse/JDK-8159068

webrev: http://cr.openjdk.java.net/~psadhukhan/8159068/webrev.00/

The issue was rMax value was decremented wrongly so when paintCells() is 
called with wrong rMax, some rows were not printed correctly.

Fix is to make sure rmax is decremented properly, only when we are 
trying to print whole visible portion of JTable and NOT when some rows 
are being painted.

Regarding the regression testcase, I could not make it automated as the 
failure happens on random iteration.
and also, getting selection background/foreground was giving same values 
with and without the missing text.

Regards
Prasanat