In this problem, we are going to use ArrayLists and classes to design a road trip.

You have three classes: GeoLocation.java which represents a geo location. A RoadTrip.java class, which represents a road trip (or an ordered list of places), and a RoadTripTester.java class which brings them all together.

In GeoLocation.java:

Add a private instance variable called name which is a String. This represents the name of the location.

Modify the Geolocation class constructor so that it is now of the format

public GeoLocation(String name, double theLatitude, double theLongitude) 

Add a getter method for name called getName().

Update the toString so that it returns a String of the format

San Francisco (37.7833, -122.4167)

Now, youll also need to create a RoadTrip class. RoadTrip stores an ordered list of locations, so youll need to have an ArrayList as an instance variable. The RoadTrip class constructor should initialize an ArrayList that stores a list of GeoLocations.

Youll also need to support these methods.

// Create a GeoLocation and add it to the road trip public void addStop(String name, double latitude, double longitude) // Get the total number of stops in the trip public int getNumberOfStops() // Get the total miles of the trip public double getTripLength() // Return a formatted toString of the trip public String toString()

Weve given you a tester program to help get you started.

The output from that program would be:

1. San Francisco (37.7833, -122.4167) 2. Los Angeles (34.052235, -118.243683) 3. Las Vegas (36.114647, -115.172813) Stops: 3 Total Miles: 572.9708850442705

GeoLocation.java:

/* * This class stores information about a location on Earth. Locations are * specified using latitude and longitude. The class includes a method for * computing the distance between two locations. * * This implementation is based off of the example from Stuart Reges at * the University of Washington. */

public class GeoLocation { // Earth radius in miles public static final double RADIUS = 3963.1676;

private double latitude; private double longitude;

/** * Constructs a geo location object with given latitude and longitude */ public GeoLocation(double theLatitude, double theLongitude) { latitude = theLatitude; longitude = theLongitude; }

/** * Returns the latitude of this geo location */ public double getLatitude() { return latitude; }

/** * returns the longitude of this geo location */ public double getLongitude() { return longitude; }

// returns a string representation of this geo location public String toString() { return "latitude: " + latitude + ", longitude: " + longitude; }

// returns the distance in miles between this geo location and the given // other geo location public double distanceFrom(GeoLocation other) { double lat1 = Math.toRadians(latitude); double long1 = Math.toRadians(longitude); double lat2 = Math.toRadians(other.latitude); double long2 = Math.toRadians(other.longitude); // apply the spherical law of cosines with a triangle composed of the // two locations and the north pole double theCos = Math.sin(lat1) * Math.sin(lat2) + Math.cos(lat1) * Math.cos(lat2) * Math.cos(long1 - long2); double arcLength = Math.acos(theCos); return arcLength * RADIUS; } }

RoadTripTester.java:

public class RoadTripTester { public static void main(String[] args) { RoadTrip rt = new RoadTrip(); rt.addStop("San Francisco", 37.7833, -122.4167); rt.addStop("Los Angeles", 34.052235, -118.243683); rt.addStop("Las Vegas", 36.114647, -115.172813);

System.out.println(rt); System.out.println("Stops: " + rt.getNumberOfStops()); System.out.println("Total Miles: " + rt.getTripLength()); } }

RoadTrip.java:

public class RoadTripTester { public static void main(String[] args) { RoadTrip rt = new RoadTrip(); rt.addStop("San Francisco", 37.7833, -122.4167); rt.addStop("Los Angeles", 34.052235, -118.243683); rt.addStop("Las Vegas", 36.114647, -115.172813);

System.out.println(rt); System.out.println("Stops: " + rt.getNumberOfStops()); System.out.println("Total Miles: " + rt.getTripLength()); } }