tester

package person;

import java.util.ArrayList;
import java.util.Collections;

import p2.Helper;
import p2.Student;

public class Tester2 {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Person p = new Person(1,"2");

        Student S = new Student(1, "DF",123);

        Double D = new Double(0.12);
        double d1 = 0.1;
        String s = "1234";
        String s2 = "12343";


        ArrayList<Helper> helpers = new ArrayList<>();

        Car c = new Car(100);




        helpers.add(new Student(1, "asd", 1234));
        helpers.add(new Student(2, "a1sd", 1234));
        helpers.add(new Student(3, "a2sd", 1234));
        helpers.add(new Student(1, "a3sd", 1234));
        helpers.add(new Student(5, "as2d", 1234));
        helpers.add(new Student(4, "as1d", 1234));
        helpers.add(new Student(10, "as5d", 1234));



        System.out.println(helpers);


        Collections.sort(helpers);

        System.out.println(helpers);


        try {


            if(helpers.get(0) instanceof Student)
                ((Student)helpers.get(0)).show(1);
            else
                System.out.println("helpers.get(1) instanceof car");

        } catch (Exception e) {
            System.out.println(e.getMessage());
        }


    }

}