Java: please make sure it compiles.

Write a program that takes a String as input from the keyboard, representing a year. Your program should do the following:

utilize matches method to check if the input consists only of digits; if not give an error

for the valid input: use switch statement on the length of the input

if the entered year has two characters, convert it to an int, add 2000 to it, and output it. Integer.parseInt method should be used to convert the input to its numeric representation

if the year entered has four characters just output it

if the year entered has neither two nor four characters (default case), output that the year is not valid