Use an ArrayList to maintain a to-do list. Each entry in the list should contain a task name (a String), a task description (a String), and an optional due date (a String in the format of yyyy-mm-dd). The entries in the list are ordered according to their due dates (with the earliest at the beginning), though they are not necessarily entered in that order. Entries without a due date are put at the end of the list.

The program uses a simple user interface (either text-only or graphical) to allow the user to choose the following operations:

To create a new to-do list

To load a to-do list from a file

To create a new entry, and add it into the list

To find an entry in the list by name, and display it

To find an entry in the list by name, and remove it

To display the entry with the earliest due date

To display all entries for a specific due date

To display all entries in the list

To save the list into a file

To exit

Write a main program to test and demonstrate the functions of the class.