The characters in Document diagrams for the insert and remove methods aren't in the middle of the boxes [1].

Indeed, at 200% scale and Arial font, there are 6 pixels on top of ‘T’ and ‘h’, but there are 8 pixels on the bottom of ‘q’. If I use Calibri font, the values are 8 and 9 pixels correspondingly [2].

Moving the text position by 0.5 seems to help, and the values become equal: 7 on either side [3].


This issue was raised during code review for JDK-8337287:
https://github.com/openjdk/jdk/pull/20376

[1] https://github.com/openjdk/jdk/pull/20376#issuecomment-2307945039
[2] https://github.com/openjdk/jdk/pull/20376#issuecomment-2353728939
[3] https://github.com/openjdk/jdk/pull/20376#issuecomment-2353743533