I need to design and code a Java program that calculates and prints the (D) diameter, the (C) circumference, or the (A) area of a circle, given the radius. The program inputs two data items: the calculation needed, and the radius of the circle. The program should continue to ask the user for values until the user enters 'Q' as the calculation type. The program should echo print the input data and prompt appropriately. Label the output and format...