OOps example

abstract class buildingStructure{
    abstract void  plan();

}
class tower1 extends buildingStructure{

    @Override
    void plan() {
        System.out.println("Executing the plan for tower1");
    }
}

public class abstractionDemo {
    public static void main(String[] args) {
        buildingStructure structure;
    }
}
=================================================================
package inheritanceDemo;
class CEO{}
class DeputyManager extends CEO{}
class territoryManager extends DeputyManager{}
class staff extends territoryManager{

}

public class Hierarchical {
}

===========================================
package inheritanceDemo;
class A{
    public A()
    {
        System.out.println("inside A constructor");
    }
}
class B extends A{

    public B() {
        super();
        System.out.println("inside B constructor");

    }
}
class C extends B{
    public C() {
        System.out.println("inside C constructor");

    }
}
public class multilevel {
    public static void main(String[] args) {
        C cobj=new C();

    }
}
=====================================================
package inheritanceDemo;
interface furniture{
    public void woodfurniture();

}
interface sofaChair{
    public void  sit();
}
class chair extends  Base implements furniture,sofaChair{

    @Override
    public void woodfurniture() {
        System.out.println("inside woodfurniture");
    }

    @Override
    public void sit() {
        System.out.println("inside the sit method");
    }
    public  void dinningChair()
    {
        System.out.println("Inside dining chair...");
    }
}



public class multipleInheritance {
    public static void main(String[] args) {
        chair chaoj=new chair();
        chaoj.sit();
        chaoj.dinningChair();
        chaoj.woodfurniture();

    }
}
==============================================
package inheritanceDemo;
class Base{
    protected int id;
    public void BaseMethod()
    {      id=8;
        System.out.println("base class id is" +id);
    }
}

class child extends Base{

    public void childmethod()
    {
        id=67;
        System.out.println("child class id is" +id);
    }
}

public class singleInheritance {
    public static void main(String[] args) {
        child obj=new child();
        Base bobj=new Base();
        obj.BaseMethod();
        obj.childmethod();

    }

}
=========================================================================
abstract class buildingStructure{
    abstract void  plan();

}
class tower1 extends buildingStructure{

    @Override
    void plan() {
        System.out.println("Executing the plan for tower1");
    }
}

public class abstractionDemo {
    public static void main(String[] args) {
        buildingStructure structure;
    }
}
============================================================
public class constructorDemo {
    String name="Sunita";
    int x;
    public constructorDemo()
    {
        System.out.println("Default constructor...");
    }
    public constructorDemo(int x,String n)
    {
        this.x=x;
      this.name=n;
        System.out.println("Hello inside the constructor..." + x + "" +n);
    }

    public static void main(String[] args) {
        constructorDemo cst1=new constructorDemo();
   //     constructorDemo cst2=new constructorDemo(2);
        constructorDemo cst3=new constructorDemo(4,"Nidhi");
        constructorDemo cst4=new constructorDemo(5,"Neeta");
        constructorDemo cst5=new constructorDemo(6,"Ritu");
constructorDemo s=new constructorDemo(22,"Deep");
        System.out.println("before the assignment");
        System.out.println(s.hashCode());
      //  System.out.println(t.hashCode());
        System.out.println(s.x + s.name);
       // System.out.println(t.x + t.name);
        constructorDemo t=s;

        System.out.println("after the assignment");

        System.out.println(s.hashCode());
        System.out.println(t.hashCode());
        System.out.println(s.x + s.name);
        System.out.println(t.x + t.name);

         t=new constructorDemo(111,"Mittal");
        System.out.println("after allocating memory for t..");
        System.out.println(t.hashCode());
        System.out.println(s.x + s.name);
        System.out.println(t.x + t.name);



    }
}
=================================================================
class Account{
int acno;
    private double balance=7000.45;

    public double getBalance() {
        return balance;
    }

    public void setBalance(double balance) {
        this.balance = balance;
    }


private void display()
{
    System.out.println(balance);
}
}

public class encapsulation {
    public static void main(String[] args) {

        Account  acob=new Account();
        //acob.display();
acob.setBalance(5000);
        System.out.println(acob.getBalance());
    }
}
===================================================================================
import java.util.Scanner;

class Book
{
    int x;
    int mfgid;
    String barcode;
    int noofpages;
    String title;
    String author;
    double price;
    public void Addbook_to_library()
    {
        Scanner sc=new Scanner(System.in);
        System.out.println("do you want to add the books to library? yes  or no");
        String choice=sc.next();
        if(choice.equals("yes")) {
            System.out.println("Enter the book details, mfgid,barcode,noofpages,title,author,price");
            System.out.println("Enter the mfid");
            mfgid = sc.nextInt();
            System.out.println("Enter the barcode");
            barcode = sc.next();
            System.out.println("Enter the noofpages");
            noofpages = sc.nextInt();
            System.out.println("Enter the title");
            title=sc.next();
            System.out.println("Enter the author");
            author=sc.next();
            System.out.println("Enter the price");
            price=sc.nextDouble();
            System.out.println("The Book details are ");
            System.out.println(mfgid);
            System.out.println(barcode);
            System.out.println(noofpages);
            System.out.println(title);
            System.out.println(author);
            System.out.println(price);
        }

else{
            System.out.println("no books to add");
        }

    }
    public void listlibrarybook()
    {
        System.out.println(mfgid);
        System.out.println(barcode);
        System.out.println(noofpages);
        System.out.println(title);
        System.out.println(author);
        System.out.println(price);

    }

    public void show(int x)
    {
        System.out.println(x);
    }
    public void addBook_to_Sale()
    {


    }
}

public class OOPsExample {
    public static void main(String[] args) {
        Book bobj=new Book();
        bobj.Addbook_to_library();
         bobj.listlibrarybook();
      bobj.show(89);
        System.out.println(bobj.x);
    }
}
===========================================================
class Product
{
    double price;
    public  Product()
    {

    }
    public Product(double pr)
    {
        this.price=pr;
    }
    public void setPrice(double price)
    {
        System.out.println("price is:" + price);
    }

}
public class passbyValue {
    public static void changePrice(Product price)
    {
        price=new Product(555.45);
        System.out.println(price.price);
    }
    public static void modifiedPrice(Product pr)
    {
        pr.setPrice(1000.33);
        System.out.println(pr.price);
    }
    public static void main(String[] args) {
Product probj=new Product();
double p;
probj.setPrice(400.78);
    passbyValue.changePrice(probj);
    }
}
==============================================================

package tstJava;

public class staticDemo {
    int x;
    static int y;
    public staticDemo()
    {
        x++;
        System.out.println("value of nonstatic x is" + x);
        y++;
        System.out.println("value of static y is" + y);

    }


    public static void main(String[] args) {
staticDemo dmobj1=new staticDemo();
staticDemo dmobj2=new staticDemo();
//staticDemo dmobj3=new staticDemo();
//staticDemo dmobj4=new staticDemo();
System.out.println(dmobj1.x);
System.out.println(dmobj1.y);

    }
}
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