Can I create a custom cursor for text in Java that's a rectangle around the current character? I'm thinking I'll have to use some FontMetrics and drawRect somehow.

Read the title. Also, the enable button is out of bounds on max GUI scale. The sliders are wonky. I really want to have a game-fitting cursor. The cursor has a laggy shadow on the new pause menu. Edit ...

Starting with v2 of CustomCursor, using it together with the Inventory Scale mod and an inventory scale factor above 1.0 will result in the cursor being seen as rendered twice, at inventory's scale ...