Text in a JTextField under the Windows LookAndFeel is not placed at the same location as in a native text field. This is true of the XP Style and the Classic style.

Native text areas (I looked at the Find dialogs in Notepad and IE) have 3 white pixels between the border rect and the first pixel of the text (I used a capital 'M') under Windows XP style. Under Windows Classic Style this is 2 pixels.

JTextFields under the Windows LookAndFeel have 2 pixels and 1 pixel under XP Style and Classic style, respectively - one too few in both cases.