Объясните код

package lab4;
 
import java.util.Scanner;
class lab4 {
  public static void main(String[] args) {
  
    System.out.println("You can chech is this thing in your basket ...");
    System.out.println("Do you want to add bread in your basket ..? Yes(1)/No(0) ..");
    Scanner S = new Scanner(System.in);
    int s1 = S.nextInt();
    payCheck check = new payCheck();
    if (s1 == 1) {
      check.food.isAtBasket();
    }
    else if(s1 == 0) {
      check.food.notAtBasket();
    } else {
       System.out.println("false");
            }
    System.out.println("                                                              ");
    System.out.println("Do you want to add a phone Samsung Galaxy in your basket ..? Yes(1)/No(0) ..");
    Scanner C = new Scanner(System.in);
    int s2 = C.nextInt();
    if (s2 == 1) {
      check.staffs.isAtBasket();
    }
    if (s2 == 0) {
      check.staffs.notAtBasket();
    } else {
       System.out.println("false");
            }
  }
}

package lab4;
 
class payCheck {
   class Basket{
     private boolean Bread = false;
     public void isAtBasket () {
       Bread = true;
       System.out.print( "Bread is at the basket: " + Bread + "" );
       
     }
     public void notAtBasket () {
       Bread = false;
       System.out.print("Bread is not at the basket: " + Bread  );
     }
   }
   class Basket_1{
     private boolean Samsung = false;
     public void isAtBasket () {
       Samsung = true;
       System.out.print("Samsung is at the basket: " + Samsung  );
     }
     public void notAtBasket () {
       Samsung = false;
       System.out.print("Samsung is not at the basket: " + Samsung );
     }
   }
  Basket food = new Basket();
  Basket_1 staffs = new Basket_1();
 
}