WAP to use multiple Inheritance in Java.

import java.io.*;
class Student {
String name;
int roll_no;
double m1, m2;
Student(String name, int roll_no, double m1, double m2)
{
this.name = name;
this.roll_no = roll_no;
this.m1 = m1;
this.m2 = m2;
}
}
interface exam
 {
public void per_cal();
}
class result extends Student implements exam
 {
double per;
result(String n, int r, double m1, double m2)
 {
super(n,r,m1,m2);
 } public void per_cal()
{
 per = ((m1+m2)/200)*100;
 System.out.println("Percentage is "+per);
}
 void display()
{
 System.out.println("The name of the student is"+name);
 System.out.println("The roll no of the student is"+roll_no); per_cal();
}
public static void main(String args[])
{
 BufferedReader bin = new BufferedReader(new InputStreamReader(System.in));
 try
{
 System.out.println("Enter name, roll no mark1 and mark 2 of the student");
String n = bin.readLine();
int rn = Integer.parseInt(bin.readLine());
double m1 = Double.parseDouble(bin.readLine());
double m2 = Double.parseDouble(bin.readLine());
result r = new result(n,rn,m1,m2); r.display(); }
catch(Exception e)
{
 System.out.println("Exception caught"+e);
 }
}
}