Java Polimorphism & Inheritance

POLYMORPHISM

a.      Employee.java

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 */

package praktikumenam;

/**

 *

 * @author arhiday

 */

public class Employee

{

   private String name;

   private String address;

   private int number;

   public Employee(String name, String address, int number)

   {

      System.out.println("Constructing an Employee");

      this.name = name;

      this.address = address;

      this.number = number;

   }

   public void mailCheck()

   {

      System.out.println("Mailing a check to " + this.name

       + " " + this.address);

   }

   public String toString()

   {

      return name + " " + address + " " + number;

   }

   public String getName()

   {

      return name;

   }

   public String getAddress()

   {

      return address;

   }

   public void setAddress(String newAddress)

   {

      address = newAddress;

   }

   public int getNumber()

   {

     return number;

   }

}

b.      Salary.java

/*

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 * and open the template in the editor.

 */

package praktikumenam;

/**

 *

 * @author arhiday

 */

public class Employee

{

   private String name;

   private String address;

   private int number;

   public Employee(String name, String address, int number)

   {

      System.out.println("Constructing an Employee");

      this.name = name;

      this.address = address;

      this.number = number;

   }

   public void mailCheck()

   {

      System.out.println("Mailing a check to " + this.name

       + " " + this.address);

   }

   public String toString()

   {

      return name + " " + address + " " + number;

   }

   public String getName()

   {

      return name;

   }

   public String getAddress()

   {

      return address;

   }

   public void setAddress(String newAddress)

   {

      address = newAddress;

   }

   public int getNumber()

   {

     return number;

   }

}

c.       VirtualDemo.java

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package praktikumenam;

/**

 *

 * @author arhiday

 */

/* File name : VirtualDemo.java */

public class VirtualDemo

{

   public static void main(String [] args)

   {

      Salary s = new Salary("Mohd Mohtashim", "Ambehta,  UP",

                                 3, 3600.00);

      Employee e = new Salary("John Adams", "Boston, MA",

                                 2, 2400.00);

      System.out.println("Call mailCheck using Salary reference --");

      s.mailCheck();

      System.out.println("\n Call mailCheck using Employee reference--");

      e.mailCheck();

    }

}

INHERITANCE

a.      Parent.java

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package praktikumenam;

/**

 *

 * @author arhiday

 */

public class Parent

{

  public String abc=null;

  public String xyz=null;

  public void printOutput()

  {

    System.out.println("Output of Inheritance  :"+abc);

    System.out.println("Output of Second Inheritance  :"+xyz);

  }

}

b.      Child.java

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 */

package praktikumenam;

/**

 *

 * @author arhiday

 */

public class Child extends Parent

{

  public void parentMethod()

  {

      abc="This is inheritance java program";

      xyz="This is child class where extends used";

      printOutput();

  }

  public static void main(String[] args)

  {

      Child ic=new Child();

      ic.parentMethod();

  }

}