Program to implement single inheritance.

CODE

import java.io.*;

class Student 

{ BufferedReader obj=new BufferedReader(new InputStreamReader(System.in));

int rollno;

String name;

public void getdata()throws IOException 

{ System.out.println("Enter rollno: ");

rollno=Integer.parseInt(obj.readLine());

System.out.println("Enter name: ");

name=obj.readLine();  } 

void putdata()

{ System.out.println("Rollno: "+rollno);

System.out.println("Name: "+name);

} }

class marks extends Student 

{ BufferedReader obj=new BufferedReader(new InputStreamReader(System.in));             

double m1, m2, m3;

public void getdata()throws IOException 

{ super.getdata();

System.out.println("Enter marks for m1, m2 and m3: ");

m1=Double.parseDouble(obj.readLine());

m2=Double.parseDouble(obj.readLine());

m3=Double.parseDouble(obj.readLine()); }

void putdata()

{ super.putdata();

System.out.println("M1: "+m1);

System.out.println("M2: "+m2);

System.out.println("M3: "+m3);

System.out.println("Total (out of 300): "+(m1+m2+m3));

System.out.println("Percentage: "+((m1+m2+m3)/3));

} }

public class EXP18Q2

{ public static void main(String[] args)throws IOException

{ marks m1 = new marks();

m1.getdata(); 

m1.putdata();  } }