sun.java2d.dpiaware=true
A jcfg font top value that works perfectly for Regular weight may fail for Bold or Italic. Bold fonts often have higher ascenders (e.g., the top of 'f' extends further). Always test all font variants with the same top value. jcfg font top
If the text looks like it is "floating" too high (too much space at the bottom), the font size defined in the JCFG might be too small relative to the UI component height defined in the application code. A jcfg font top value that works perfectly
The query regarding "font top" usually stems from a specific visual defect where: retro-style indie games
As of 2025, the use of JCFG files is being slowly supplanted by more sophisticated systems like HarfBuzz (for text shaping) and DirectWrite (on Windows). However, for low-level, bitmap-based font rendering—particularly in game console emulators, retro-style indie games, and embedded industrial displays—the JCFG format remains irreplaceable.
The top parameter, in particular, is experiencing a renaissance as UI designers demand more control over variable fonts and color fonts (like COLRv1). Expect to see extended JCFG schemas that support multiple top values for different font axes (weight, width, slant).
default.fontMap.SansSerif=Microsoft Sans Serif,plain,10 default.fontMap.Serif=Times New Roman,plain,10 default.fontMap.Monospaced=Courier New,plain,10