| J# | GHC.Exts |
| JHC | Distribution.Compiler, Distribution.Simple.Compiler, Distribution.Simple.Setup, Distribution.Setup, Distribution.Simple |
| January | System.Time |
| JoinStyle | Graphics.X11.Types, Graphics.X11.Xlib, Graphics.X11 |
| JoystickButtons |
| 1 (Type/Class) | Graphics.UI.GLUT.Callbacks.Window, Graphics.UI.GLUT.Callbacks, Graphics.UI.GLUT |
| 2 (Data Constructor) | Graphics.UI.GLUT.Callbacks.Window, Graphics.UI.GLUT.Callbacks, Graphics.UI.GLUT |
| JoystickCallback | Graphics.UI.GLUT.Callbacks.Window, Graphics.UI.GLUT.Callbacks, Graphics.UI.GLUT |
| JoystickPosition |
| 1 (Type/Class) | Graphics.UI.GLUT.Callbacks.Window, Graphics.UI.GLUT.Callbacks, Graphics.UI.GLUT |
| 2 (Data Constructor) | Graphics.UI.GLUT.Callbacks.Window, Graphics.UI.GLUT.Callbacks, Graphics.UI.GLUT |
| July | System.Time |
| June | System.Time |
| Just | Data.Maybe, Prelude |
| javaStyle | Text.ParserCombinators.Parsec.Language |
| jhcProgram | Distribution.Simple.Program |
| join |
| 1 (Function) | Control.Monad |
| 2 (Function) | Data.ByteString |
| 3 (Function) | Data.ByteString.Char8 |
| 4 (Function) | Data.ByteString.Lazy |
| 5 (Function) | Data.ByteString.Lazy.Char8 |
| joinBevel | Graphics.X11.Types, Graphics.X11.Xlib, Graphics.X11 |
| joinDrive |
| 1 (Function) | System.FilePath.Posix, System.FilePath |
| 2 (Function) | System.FilePath.Windows |
| joinMiter | Graphics.X11.Types, Graphics.X11.Xlib, Graphics.X11 |
| joinPS | Data.PackedString |
| joinPath |
| 1 (Function) | System.FilePath.Posix, System.FilePath |
| 2 (Function) | System.FilePath.Windows |
| joinProcessGroup | System.Posix.Process, System.Posix |
| joinRound | Graphics.X11.Types, Graphics.X11.Xlib, Graphics.X11 |
| joystickButtonA | Graphics.UI.GLUT.Callbacks.Window, Graphics.UI.GLUT.Callbacks, Graphics.UI.GLUT |
| joystickButtonB | Graphics.UI.GLUT.Callbacks.Window, Graphics.UI.GLUT.Callbacks, Graphics.UI.GLUT |
| joystickButtonC | Graphics.UI.GLUT.Callbacks.Window, Graphics.UI.GLUT.Callbacks, Graphics.UI.GLUT |
| joystickButtonD | Graphics.UI.GLUT.Callbacks.Window, Graphics.UI.GLUT.Callbacks, Graphics.UI.GLUT |
| joystickCallback | Graphics.UI.GLUT.Callbacks.Window, Graphics.UI.GLUT.Callbacks, Graphics.UI.GLUT |
| joystickInfo | Graphics.UI.GLUT.State, Graphics.UI.GLUT |
| julianMonthLength | Data.Time.Calendar.Julian |
