Carrying out the logic of work in a separate class

Question

I want to take the logic out of Main into a separate class, but it does not work.
Created the folder "logic" and I want the logic to be there, and Main to only execute.

 public class Main { public static void main(String[] args) throws IOException { TaxiStation station = new TaxiStation("D:\\Cars.csv"); List<Car> carPool = station.getCarPool(); //Посчитать стоимость автопарка. double poolPrice = 0.0; for (Car car : carPool) { poolPrice += car.getPrice(); } System.out.println("Cost of taxistation's cars: " + poolPrice ); //Провести сортировку автомобилей парка по расходу топлива. Collections.sort(carPool, new Comparator<Car>() { @Override public int compare(Car car1, Car car2) { return ((int) Math.round(100.0 * (car1.getFuelConsumption() - car2.getFuelConsumption()))); } }); for (Car car: carPool) { System.out.printf("FuelConsumption of %s: %s", car, car.getFuelConsumption()); System.out.println(); }

How to write all this in logic class, leave only main ?

Well, just as you carried out the TaxiStation class, you also TaxiStation out logic logic somewhere, and in main do new logic .... roughly speaking ...... or is there a class with static methods, if it is not tied to a copy

arachnoden arachnoden 752 one eight 31 · Accepted Answer · 2016-07-17T07:00:01

First we create logic, in the logic class I created two methods, static and normal, in fact one is enough, so choose the one you need:

 public class Logic { //статический метод (если не нужно создавать екземпляр класса) public static void logicStatic() throws IOException { TaxiStation station = new TaxiStation("D:\\Cars.csv"); List<Car> carPool = station.getCarPool(); //Посчитать стоимость автопарка. double poolPrice = 0.0; for (Car car : carPool) { poolPrice += car.getPrice(); } System.out.println("Cost of taxistation's cars: " + poolPrice ); //Провести сортировку автомобилей парка по расходу топлива. Collections.sort(carPool, new Comparator<Car>() { @Override public int compare(Car car1, Car car2) { return ((int) Math.round(100.0 * (car1.getFuelConsumption() - car2.getFuelConsumption()))); } }); for (Car car: carPool) { System.out.printf("FuelConsumption of %s: %s", car, car.getFuelConsumption()); System.out.println(); } } //обычный метод (если создается экземпляр класса логики) public void logic() throws IOException { TaxiStation station = new TaxiStation("D:\\Cars.csv"); List<Car> carPool = station.getCarPool(); //Посчитать стоимость автопарка. double poolPrice = 0.0; for (Car car : carPool) { poolPrice += car.getPrice(); } System.out.println("Cost of taxistation's cars: " + poolPrice ); //Провести сортировку автомобилей парка по расходу топлива. Collections.sort(carPool, new Comparator<Car>() { @Override public int compare(Car car1, Car car2) { return ((int) Math.round(100.0 * (car1.getFuelConsumption() - car2.getFuelConsumption()))); } }); for (Car car: carPool) { System.out.printf("FuelConsumption of %s: %s", car, car.getFuelConsumption()); System.out.println(); } } }

Then, in the main class, call the required logic method (static or normal):

 public class Main { public static void main(String[] args) throws IOException{ //Если не нужно создавать экземпляр класса тогда: Logic.logicStatic(); //Если нужно создать екземпляр класса тогда: Logic lgk = new Logic(); lgk.logic(); //если необходимо, можно изменить методы для того //чтобы им можно было передавать аргументы //например: //Logic.logicStatic("Some Car"); } }

Carrying out the logic of work in a separate class

1 answer 1

More articles: