Program in Java

Write a program that demonstrates the switch case. Implement the following functionalities in the cases: Case 1: Find the squareroot of a number using the Math class method. Case 2: Display today's date. Case 3: Split the following string and store it in a sting array. "I am learning Core Java" Write a program that defines an interface having the following methods addition subtraction, multiplication, and division. Create a class that implements this interface and provides appropriate functionality to carry out the required operations. Hard code two operands in a test class having a main method that calls the implementing class. Write a program to display the number of characters for a string input. The string should be entered as a command line argument using (String [] args)