Write in java language! Thanks!

Implement a recursive function to find the sum of digits of a given number.

Instructions:

Define a Java function named "sumOfDigits" that takes a single integer argument $"$n$".$

Implement the function using recursion to compute the sum of digits of $"$n$".$

Ensure that the function returns an integer.

Test the function by calling it with several values of $"$n$"$ and printing the results.