| HexNumberFormat | A custom number formatter that formats numbers as hexadecimal strings. |
| LineUtilities | Some utility methods for Line2D objects. |
| LogFormat | A number formatter for logarithmic values. |
| RelativeDateFormat | A formatter that formats dates to show the elapsed time relative to some base date. |
| ResourceBundleWrapper | Wrapper of ResourceBundle.getBundle() methods. |
| XYCoordinateType | Represents several possible interpretations for an (x, y) coordinate. |