Write a Java Program to implement multilevel inheritance by applying various access controls to its data members and methods.
Program Code:
import java.io.DataInputStream;
class Student
{
private int rollno;
private String name;
DataInputStream dis=new DataInputStream(System.in);
public void getrollno()
{
try
{
System.out.println("Enter rollno ");
rollno=Integer.parseInt(dis.readLine());
System.out.println("Enter name ");
name=dis.readLine();
}
catch(Exception e){ }
}
void putrollno()
{
System.out.println("Roll No ="+rollno);
System.out.println("Name ="+name);
}
}
class Marks extends Student
{
protected int m1,m2,m3;
void getmarks()
{
try
{
System.out.println("Enter marks :");
m1=Integer.parseInt(dis.readLine());
m2=Integer.parseInt(dis.readLine());
m3=Integer.parseInt(dis.readLine());
}
catch(Exception e) { }
}
void putmarks()
{
System.out.println("m1="+m1);
System.out.println("m2="+m2);
System.out.println("m3="+m3);
}
}
class Result extends Marks
{
private float total;
void compute_display()
{
total=m1+m2+m3;
System.out.println("Total marks :" +total);
}
}
class MultilevelDemo
{
public static void main(String arg[])
{
Result r=new Result();
r.getrollno();
r.getmarks();
r.putrollno();
r.putmarks();
r.compute_display();
}
}
Output:
Enter rollno
45
Enter name
Mukesh
Enter marks :
54
78
46
Roll No = 45
Name =Mukesh
m1=54
m2=78
m3=46
Total marks :178.0
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