1. In java Create a class called ExceptionPractice which includes a main method. The program asks user to enter a string. If the string is empty, it throws a EmptyStringException. The program handles the exception by printing an error message. If the string is not empty, the program converts the string to uppercase and prints it.

You also need to write a class called EmptyStringException. It should extend the Exception class. Include two constructors, the default constructor and a one-parameter constructor (where the parameter type should be String).

Include your code for both ExceptionPractice class and EmptyStringException class below.

2. Create a class called FileInputOutputPractice which includes the main method. The program reads line by line from an input file (named as "activity5_input.txt"), adds line number at the beginning of each line and converts each line to uppercase, and then writes to a separate file called "activity5_output.txt". Make sure you include exception handling code for file I/O. Also make sure to include "import java.io.*;" statement.