K = (1/2)mv^2

Write a method that accepts mass and a velocity as arguments/paraments. The method should calculate and return the kinetic energy.

In the main method, asks the user to enter values of mass and velocity, then calls the method to get the results and print them.

The user input should be validated. If the user inputs are invalid, outputs a error message.

The program should repeadetly accept the user input and calculate the result until the user chooses not to.

In the end, the average value should be calculated.

The results should be formatted appropriately.

Do not use global variables for this program!!!

Java program for this problem, I like to use jGrasp for java.