Program 5

F:\Program 5\src\Prog05.java

/***************************************************************************
 //    Programmer: Jonathan Wheeler        CSC110 Programming Assignment 5
 //    Date: May 8, 2017
 //    Description:
 //    Input:
 //    Output:
 ****************************************************************************/

import java.io.*;
import java.util.*;

public class Prog05 {

    private static Scanner console = new Scanner(System.in);

    public static void main(String[] args) throws FileNotFoundException{
        System.out.println("Give me a 5-digit zip code and a");
        System.out.println("proximity and I'll tell you where");
        System.out.println("that zip code is located along");
        System.out.println("with a list of other zip codes");
        System.out.println("within the given proximity.");
        System.out.println();
        System.out.println();
        Zipcode[] zipcodes = readFile();
        Scanner console = new Scanner(System.in);
        int option = 0;
        while (option != 3) {
            System.out.println("    1. Find zip codes in a radius");
            System.out.println("    2. Find zip codes in a state");
            System.out.println("    3. Exit application");
            System.out.println("Your choice:");

            if (console.hasNextInt()) {
                option = console.nextInt();
            } else {
                System.our.println("Invalid selection. Please enter 1-3.");
            }
            console.nextLine();
            //add input checking for choice

            if (option == 1) {
                radius(zipcodes);
            }

            if (option == 2) {
                stateCheck(zipcodes);
            }
        }
    }

    public static Zipcode[] readFile() throws FileNotFoundException {
        Scanner input = new Scanner(new File("zipcode.txt"));
        Zipcode[] zipcodes;
        int lines = 0;
        String fileContents = "";
        while(input.hasNextLine()) {
            String line = input.nextLine();
            fileContents += line + "\n";
            lines++;
        }
        lines = lines / 3;
        zipcodes = new Zipcode[lines];
        String zipcode;
        String city;
        String state;
        double latitude;
        double longitude;
        Zipcode currentZip;
        input.close();
        input = new Scanner(fileContents);
        for (int i = 0; i < zipcodes.length; i++) {
            zipcode = input.next();
            city = input.next();
            city = city.substring(0, city.length() - 1);
            state = input.next();
            latitude = input.nextDouble();
            longitude = input.nextDouble();
            currentZip = new Zipcode(zipcode, city, state, latitude, longitude);
            zipcodes[i] = currentZip;
        }
        return zipcodes;
    }

    public static void radius(Zipcode[] zipcodes) {
        double radius = 0;
        Zipcode zipcode = null;
        
        //change this because zip changed from int to string
        System.out.println("What proximity?");
        radius = getValidDouble();
        System.out.print("What zip code are you interested in?");
        zipcode = getValidZipCode();

        for (int i = 0; i < zipcodes.length; i++) {
            if (zipCode.distance(zipcodes[i]) <= radius) {
                System.out.println(zipcodes[i]);
            }
        }
    }
 
    public static double getValidDouble() {
        while (true) {
            if (console.hasNextDouble()) {
                double ret = console.nextDouble();
                console.nextLine();
                return ret;
            }
            console.nextLine(); // discards invalid input
            System.out.println("Please enter a numerical value");
        }
    }
    
    public static Zipcode getValidZipCode(Zipcode[] zipcodes) {
        while (true) {
            if (console.hasNextInt()) {
                String zip = console.next();
                if (zip.length() == 5) {
                    Zipcode zipcode = findZipcode(zipcodes, zip);
                    if (zipcode != null) {
                        console.nextLine();
                        return zip;
                    }
                }
            }
            console.nextLine(); // discards invalid input
            System.out.println("That is not a valid zip code, please try again.");
        }
    }
    
    public static int findZipcode(Zipcode[] zipcodes, String zipcodeToFind) {
        for(int i = 0; i < zipcodes.length; i++) {
            Zipcode zipcode = zipcodes[i];
            if (zipcode.getZipcode().equals(zipcodeToFind)) {
                return zipcode;
            }
        }
        return null;
    }

    public static void stateCheck(Zipcode[] zipcodes) {
        //input checking
        System.out.println("Please enter the state");
        String state = console.next();
        Zipcode test = new Zipcode("0", "city", state, 0, 0);

        for(int i = 0; i < zipcodes.length; i++){
            if(test.get_state().equals(zipcodes[i].get_state())){
                System.out.println(zipcodes[i]);
            }
        }
    }
}

F:\Program 5\src\Zipcode.java

public class Zipcode {

    public static final double RADIUS = 3956.6;

    private String zipcode;
    private String city;
    private String state;
    private double latitude;
    private double longitude;

    public Zipcode(String zipcode, String city, String state, double latitude,
                    double longitude) {
        this.zipcode = zipcode;
        this.city = city;
        this.state = state;
        this.latitude = latitude;
        this.longitude = longitude;
    }

    public boolean equals(Zipcode zip1) {
        return (zip1.getZipcode().equals(this.zipcode));
    }

    public double distance(Zipcode check) {
        double lat1 = Math.toRadians(latitude);
        double long1 = Math.toRadians(longitude);
        double lat2 = Math.toRadians(check.getLatitude());
        double long2 = Math.toRadians(check.getLongitude());
        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;
    }

    public String getZipcode() {
        return zipcode;
    }

    public String getCity() {
        return city;
    }

    public String getState() {
        return state;
    }

    public double getLatitude() {
        return latitude;
    }

    public double getLongitude() {
        return longitude;
    }

    public String toString() {
        return zipcode + " - " + city + ", " + state;
    }
}