FakeDataProvider takes a .txt file (containing coordinates of an area) as input in addition to an integer (number of fake data to be produced for that coordinate)

FakeDataProvider.java

import java.util.Scanner;
import java.util.ArrayList;
import java.text.DecimalFormat; 
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.Objects;
import java.util.Random;
import java.util.InputMismatchException;
import java.io.*;


/*
example input file - coordinates.txt:
((29.4958671, 52.38693239999998), (29.8352834, 52.67900420000001))
*/
/*
USAGE: java FakeDataProvide coordinates.txt 150
*/


public class FakeDataProvider {
    
    public static void main(String[] args) throws FileNotFoundException, UnsupportedEncodingException {
        
        PrintWriter writer = new PrintWriter("mysql-data.csv", "UTF-8");

        double[] coordinates = readFile(args[0]);
        int noOfRecords = Integer.parseInt(args[1]);

        double ne_lat = coordinates[0];
        double ne_lng = coordinates[1];
        double sw_lat = coordinates[2];
        double sw_lng = coordinates[3];
        
        
        System.out.println("writing to file...");
        for (int count=0 ; count < noOfRecords ; count++){
            //random latitute and longtitute
            double randomLng = getRandomCoordinate(sw_lng, ne_lng);
            double randomLat = getRandomCoordinate(sw_lat, ne_lat);
            //id     
            int id = getRandomId(randomLat, randomLng);
            String location = "";       
            int price = (int) getRandom(60, 700);
            String thumbnail_img = "";
            String is_favourite = getRandomIsFavourite();
            int review_count = (int) getRandom(5, 110);  
            String type = getRandomType();
            String title = getRandomTitle(type);        
            int bedroom_count = (int) getRandom(1, 9);
            int bed_count = (int) getRandom(bedroom_count, 10);
            int bathroom_count = (int) getRandom(1, 5);
            int max_guest = (int) getRandom(1, 15);        
            String user_id = "";
            
            StringBuilder line = new StringBuilder();
            line.append(id + ", " + 
                        location + ", " + 
                        price + ", " + 
                        thumbnail_img + ", " + 
                        is_favourite + ", " + 
                        review_count + ", " + 
                        title + ", " + 
                        type + ", " + 
                        bed_count + ", " + 
                        bedroom_count + ", " + 
                        bathroom_count + ", " + 
                        max_guest + ", " + 
                        randomLng + ", " + 
                        randomLat + ", " + 
                        user_id);
            writer.println(line.toString());
        }
    
        writer.close();
        System.out.println("completed");
    }
    
    
    public static double getRandomCoordinate(double min, double max){
        DecimalFormat df = new DecimalFormat("#.#######");
        double randNo = getRandom(min,max);
        return Double.valueOf(df.format(randNo));
    }
    
    public static double getRandom(double min, double max) {        
        Random r = new Random();
        double randomValue = min + (max - min) * r.nextDouble();
        return randomValue;
    }
    
    public static String getRandomIsFavourite() {
        int min = 1;
        int max = 10;
        
        int randNo = (int) getRandom(min, max);
        if (randNo % 2 == 0) {
            return "true";
        } else {
            return "false";
        }
    }
        
    public static String getRandomType() {
        ArrayList<String> types = new ArrayList<>();
        types.add("Shared Room");
        types.add("Private Room");
        types.add("Entire House");

        int min = 0;
        int max = 2;
        
        int randNo = (int) getRandom(min, max);
        if (randNo == 0) {
            return types.get(0);
        } else if (randNo == 1) {
            return types.get(1);
        } else {
            return types.get(2);
        }
    }
    
    public static int getRandomId(double lat, double lng){
        long timestamp = System.currentTimeMillis();
        int id = Objects.hash(lat, lng, timestamp);
        if (id < 0) {
            id *= -1;
        }
        return id;
    }
    
    public static String getRandomTitle(String myType) {
        String type = "";
        if (myType == "Shared Room" || myType == "Private Room"){
            type = "room";
        } else {
            type = "house";
        }
        
        ArrayList<String> titles = new ArrayList<>();
        titles.add("Beautiful");
        titles.add("Nice");
        titles.add("Cozy");
        titles.add("Luxury");
        titles.add("Lovely");
        
        ArrayList<String> complemetary = new ArrayList<>();
        complemetary.add("in the heart of city");
        complemetary.add("near beach");
        complemetary.add("...");

        int min = 0;
        int maxTitles = titles.size() - 1;
        int maxComplemetary = complemetary.size() - 1;
        
        int randNo = (int) getRandom(min, maxTitles);
        int randNo2 = (int) getRandom(min, maxComplemetary);
        
        String finalTitle = "";
        for (int i=0 ; i < titles.size() ; i++){            
            if (randNo == i){
                finalTitle = titles.get(i) + " " + type;
            }
        }
        for (int i=0 ; i < complemetary.size() ; i++){
            if (randNo2 == i){
                finalTitle = finalTitle + " " + complemetary.get(i);
            }
        }
        
        return finalTitle;
    }
    
    
    private static final Pattern PATTERN = Pattern.compile(
        "^\\s*\\u0028+"
        + "(-?\\d+\\.\\d+)\\u002c+\\s+"
        + "(-?\\d+\\.\\d+)\\u0029+\\u002c+"
        + "\\s*\\u0028+"
        + "(-?\\d+\\.\\d+)\\u002c+\\s+"
        + "(-?\\d+\\.\\d+)\\u0029+$"
    );


    public static double[] readFile(String fileName) throws FileNotFoundException {
        Scanner input = new Scanner(new File(fileName));
        String firstLine = input.nextLine();
        Matcher matcher = PATTERN.matcher(firstLine);
        if (matcher.matches()) {
            double sw_lat = Double.parseDouble(matcher.group(1));
            double sw_lng = Double.parseDouble(matcher.group(2));
            double ne_lat = Double.parseDouble(matcher.group(3));
            double ne_lng = Double.parseDouble(matcher.group(4));
            double[] coordinates = {ne_lat, ne_lng, sw_lat, sw_lng};
            return coordinates;
        }
        else {
            System.out.println(firstLine);
            throw new InputMismatchException("ERROR: invalid coordinates format");
        }
    }
    
    
    
    
}