Final answer:
To modify the getFullDate method, split the parameter string into its component parts to obtain the month, day, and year values. Use Zeller's Congruence to determine the day of the week and convert the month and day of the week to English.
Step-by-step explanation:
To modify the getFullDate method, you will need to first split the parameter string into its component parts to obtain the month, day, and year values. You can use string methods like substring and indexOf to accomplish this.
Once you have the individual date items stored in separate variables, you can convert them to integers using Integer.parseInt() to be used in Zeller’s Congruence.
Next, you can use Zeller's Congruence to determine the day of the week for the given date. Finally, you can use switch structures to convert the month number into the month name in English and the day of the week integer into the day of the week in English. Return the fully descriptive date as the result of the method.