سناریو-1،2،3

package B15;

public class Trainer {
    String dept = "java";
    String institute = "payilagam";
    private int salary = 10000;

    Trainer(String dept, String intitute) {
        this.dept = dept;
        this.institute = institute;
    }

    public static void main(String[] args) {
        Trainer trainerkumar = new Trainer("cse", "payilagam");
        String a = trainerkumar.traing();
        trainerkumar.salary();
        System.out.println(a);
    }

    public void salary() {

        System.out.println("salary = " + salary);

    }

    public String traing() {
        return dept + " " + institute;
    }
}

package B15;

public class SQLtrainer extends Trainer {
    SQLtrainer(String dept, String intitute) {
        super(dept, intitute);

    }

    public static void main(String[] args) {
        SQLtrainer ram = new SQLtrainer("cse111", "srit");
        String a = ram.traing();
        System.out.println(a);
        ram.salary();

        System.out.println(ram.dept);
        System.out.println(ram.institute);
    }

}

package B15;

public interface  Actor {
    boolean makeupRequired = true;
    String address = "chennai";


    void act();

    void dance();

    void sing();

}

package B15;

public class ActorSivakumar implements Actor {
    static String address = "coimbatore";
    int num;
    String car;

    public ActorSivakumar(int num, String car) {
        this.num = num;
        this.car = car;

    }

    public static void main(String[] args) {
        ActorSivakumar as = new ActorSivakumar(65, "Audi car");
        Actor ac = new ActorSivakumar(55, "benz car");// dynamic binding
        as.act();
        as.speaking();
        as.dance();
        as.sing();
        as.sell();
        // ac.speaking();//dynamic binding
        ac.act();
        ac.dance();
        ac.sing();
        // ac.sell();//dynamic binding
        System.out.println(ActorSivakumar.address);
        System.out.println(Actor.address);
        System.out.println(as.makeupRequired);
    }

    public void sell() {

        System.out.println(num + "\n" + car);
    }

    public void speaking() {
        System.out.println("sivakumar is speaking");

    }

    public void act() {
        System.out.println("sivakumar is acting");

    }

    public void dance() {
        System.out.println("sivakumar is dancing");

    }

    public void sing() {
        System.out.println("sivakumar is singing");

    }

}

package B15;

public abstract class Smartphone {

    public Smartphone()// constructor
    {
        System.out.println("Smartphone under development");
    }

    public abstract int call(int second);

    public abstract void sendMessage();

    public abstract void receivecall();

    public void browse()

    {
        System.out.println("smartphone browsing");
    }
}

package B15;

public abstract class FactoryDemo extends Smartphone {

    public abstract void fingerprint();

    public abstract void providepattern();

    public void browse()//over ridding

    {
        boolean originalpiece = false;// local variable//access within method only
        int price = 0;// local variable//access within method only
        System.out.println("FactoryDemo browsing");

    }
}

package B15;

public class Samsung extends FactoryDemo {
    static int price = 5000;

    public static void main(String[] args) {
        Samsung sam = new Samsung();
        sam.browse();// over ridded method only taken
        sam.fingerprint();
        sam.providepattern();
        int b = sam.call(100);//return
        sam.receivecall();
        System.out.println("b = " + b);
        System.out.println("pric = "+sam.price);

    }

    public void fingerprint() {
        System.out.println("fingerprint");

    }

    public void providepattern() {
        System.out.println("providepattern");

    }

    public int call(int second) {

        return second;//understanding return keyword
    }

    public void sendMessage()//understanding abstraction
    {

    }

    public void receivecall() {
        System.out.println("receivecall");

    }

}