Draft a Java program that accomplishes the following tasks:
- Prompts users to input a number (must be an integer).
- Calculates the factorial value of the number: for example, if the user keys in “5,” the program calculates the result based on the following formula: 5*4*3*2*1; if the input value is “3,” the program will calculate 3*2*1.
- Display the result.
- Users can press Y to continue or N to exit the program.