Create an application named convertmilestokilometers whose main() method prompts a user for a number of miles, passes the value to a method that converts the value to kilometers, and then returns the value to the main() method where it is displayed. a mile is 1.60934 kilometers.

The solution codes are written in Java as follows:

import java.util.Scanner;public class ConvertMilesToKilometers {    public static double convert_to_km(double miles)    {        double km = miles * 1.60934;        return km;    }    public static void main(String[] args) {        System.out.print("Enter miles: ");        Scanner input = new Scanner(System.in);        double inputMiles = input.nextDouble();        System.out.println(inputMiles + " mile(s) = " + convert_to_km(inputMiles) + " km");    }}

Explanation:

Line 1 (Import Java Scanner Class)

Since the application is expected to get an input miles from user, the Java Scanner class is needed. The Java Scanner class will be required to create a Scanner object to get input from user (Line 15).  

Line 5 -10 (Create a method to convert mile to km)

This method accept one input (miles) and convert it to km.km is returned as the output.

Line 14-16 (Get user input for miles )

A Scanner object is created in Line 15. To get user input for miles, the nextDouble() method of the Scanner object is used (Line 16).The nextDouble() is a method dedicated to get a decimal number as input (since miles is often in decimal format rather than an integer).

Line 18 (call method to convert miles to km and display the output)

Call convert_to_km() method by passing the user input miles (inputMiles) as argument. The method will convert the miles to km and return output to the main method and display it in terminal using println() method.