DateChooser is a Java class that allows a programmer to present the user with an input dialog for easily choosing a date and feeding it to the program. The calendar input dialog show the "day of the year" and "week of the year" data for the selected day. It also catch the mouse wheel motion to scroll through months. Finally DateChooser can run as an indipendent application, simply executing the JAR file. Updated (version 1.2.4): now you can set the starting year and month to be shown when the dialog window is opened;