dac1988_p1.java

/*
 * File: DownloadTimeApp.java
 * Author: David Chapman, dac1988@uab.edu
 * Assignment: Project 1 EE333 Fall 2013
 * Vers: 1.0.1 01/12/2014 dac - initial coding
 *
 * Credits: (if any for sections of code)
 */
import java.util.Scanner;

/**
 * The Download Time App's main class
 * 
 * @author David
*/
public class DownloadTimeApp {
  /**
   * Will split a double (assumed to be seconds) into an array of hours, minutes
   * and seconds
   * 
   * @param  seconds the seconds determined by user input
   * @return         the array of time components (hours, minutes, seconds) 
  */
  public static int[] splitTimeComponents(double seconds)
  {
    int hours = (int) seconds / 3600;
    int remainder = (int) seconds - hours * 3600;
    int minutes = remainder / 60;
    remainder = remainder - minutes * 60;
    int secs = remainder;
    int[] ints = {hours, minutes, secs};
    return ints;
  }
  
  /**
   * The main class method
   * 
   * @param args the command line arguments
  */
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    String choice = "y";
    double fileSize;
    double downloadSpeed;
    
    // print student name to stdout
    System.out.println("------------------");
    System.out.println("EE333 - P1 - Download Time Estimator");
    System.out.println("David A. Chapman - dac1988");
    System.out.println("------------------");
    System.out.println();
    
    while(choice.equalsIgnoreCase("y")) 
    {
      // get the input from the user
      System.out.print("Enter file size (MB): ");
            
      // store valid input
      fileSize = sc.nextDouble();
      System.out.print("Enter the download speed (MB/sec): ");
      downloadSpeed = sc.nextDouble();
      
      // calculate the result: t = d/r
      double downloadTime = (fileSize / downloadSpeed);
      
      // split the time compoentns up
      int[] timeComponents = splitTimeComponents(downloadTime);
      
      // construct the output string
      String outputMessage = "\nThis download will take approximately " 
        + timeComponents[0] + " hours " + timeComponents[1] + " minutes "
        + timeComponents[2] + " seconds.\n";
      
      // output the outputMessage
      System.out.println(outputMessage);
      
      // see if the user wants to continue
      System.out.print("Continue? (y/n): ");
      choice = sc.next();
      System.out.println();
    }
  }
}