A DESCRIPTION OF THE REQUEST :
The STROKE_CONTROL hint is ignored in openjdk.
It's a known issue that this isn't supported, and it needs to be. It says so here (under "3. Antialiasing graphics rasteriser"):
EXPECTED VERSUS ACTUAL BEHAVIOR :
Most noticeably, antialiased horizontal and vertical lines of width 1 are drawn with width 2 and an alpha of 0.5.
They should be drawn width 1 and an alpha of 1.