SwingUtilities.isRightMouseButton(evt)
this uses a bit operand to compare:
(evt.getModifiers() & InputEvent.BUTTON3_MASK) == InputEvent.BUTTON3_MASK)
while other, just compare with a magic number that can change, I would rather change first comparison to:
if(evt.getButton() == java.awt.event.MouseEvent.BUTTON3)
SwingUtilities is part of the javax which comes with jdk, so I would prefer to delegate that responsabillity to this utility (helper) class, so in that case, SwingUtilities wins.