multilevel with constructor example java program

//multilevel with constructor

 class students1

{

        private int sno;

        private String sname;

        students1(int no,String name)

        {

                sno = no;

                sname = name;

        }

        public void dispstud()

        {

                System.out.println("Student No : " + sno);

                System.out.println("Student Name : " + sname);

        }

}

class marks1 extends students1

{

        protected int mark1,mark2;

        marks1(int n1,int n2,int sno,String sname)

        {

                super(sno,sname);

                mark1 = n1;

                mark2 = n2;

        }

        public void dispmarks()

        {

                System.out.println("Mark1 : " + mark1);

                System.out.println("Mark2 : " + mark2);

        }

}

class finaltot1 extends marks1

{

        private int total;

        finaltot1(int n1,int n2,int no,String name)

        {

                super(n1,n2,no,name);

                total = mark1 + mark2;

        }

        public void disptotal()

        {

                System.out.println("Total : " + total);

        }

        public static void main(String args[])

        {

                finaltot1 f = new finaltot1(90,89,100,"Kirthika");

                f.dispstud();

                f.dispmarks();

                f.disptotal();

        }

}