/*
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 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package com.mycompany.ja8;

/**
 *
 * @author Admin
 */
public class Main3 {


    public static void main(String[] args) {
        // instanceof
        String s = "HELLO";
        System.out.println("s instanceof String =" + (s instanceof String));

        boolean res = s instanceof String;
        System.out.println("res=" + res);

        // Student s = new Student("Olga2", "Petrova2");
        Student s1 = new Student("Olga2", "Petrova2");
        boolean res2 = s1 instanceof Person;
        System.out.println("res2=" + res2);
        res2 = s1 instanceof Student;
        System.out.println("res2=" + res2);
        res2 = s1 instanceof Object;
        System.out.println("res2=" + res2);
        //
        Person p2 = null;
        p2 = new Student("Olga", "Petrova3");
        if(p2 instanceof Student){
            System.out.println("STUDENT!!!!!!!!");
            // используем явное преобразование типа - оператор (целевой_тип)
            //Student s3 = (Student) p2;
            Student s3 = (Student) p2;
            System.out.println("s3=" + s3.getMark());
            //System.out.println("");
        }
        p2 = new Person("Olga", "Petrova3");
        //Student s4 = (Student) p2;
        if(p2 instanceof Student){
            Student s4 = (Student) p2;
        }

        System.out.println("OK!");
    }
}