Hierarchical inheritance in java

package javaapplication14;



class employee

{

double salary;

}

class developer extends  employee

{

int dvbonus=5000;

String dv_name;



}



class designer extends  employee

{

int debonus=4000;

String de_name;



}







public class JavaApplication14 {



   

    public static void main(String[] args)

    {

        designer de=new designer();

       double salary= de.salary=35000;

      String name= de.de_name="ali";

       System.out.println("Name="+name+"\ntotal salary= "+(salary+de.debonus));

           

       developer d=new developer();

       salary=d.salary=50000;

       name="immad";

         System.out.println("Name="+name+"\ntotal salary= "+(salary+d.dvbonus));



    }

   

}

Types of Inheritance Single & multilevel inheritance in java

package javaapplication13;



class calculator1

{

   

public int sum(int a,int b)

{

return a+b;

}





}





class calculator2 extends calculator1

{

   

public int sub(int a,int b)

{

return a-b;

}

   

   

}





class calculator3 extends calculator2

{

   

public int mul(int a,int b)

{

return a*b;

}

}











public class JavaApplication13 {



   

    public static void main(String[] args)

    {

   int r;

    calculator2 c=new calculator3();

   r= c.sum(9, 9);

   System.out.println(r);

   r=c.sub(9,9);

   System.out.println(r);

 

   

    }

   

}