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StudentResult.java
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89 lines (68 loc) · 2.02 KB
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/*
* Design a class called Student having data members like student name and roll
* number and method called show to display the name and roll number. Derive a
* class called Test from student class having three subjects marks as a data
* members and method named show_marks to display the marks. Create an interface
* called Sports contains constant sports marks and method show_sportswt. Derive
* a class Result from Test class and implement the interface Sports. Calculate
* total marks by considering sports marks. Then display the total in Result
* class.
*/
package Derived_Class;
import java.util.Scanner;
class Student {
String name;
int rollno;
Student(String name, int rno) {
this.name = name;
rollno = rno;
}
void show() {
System.out.println("Name: " + name + "\nRoll Number: " + rollno);
}
}
class Test extends Student {
int sub1, sub2, sub3;
Test(int sub1, int sub2, int sub3, String name, int rno) {
super(name, rno);
this.sub1 = sub1;
this.sub2 = sub2;
this.sub3 = sub3;
}
void show_marks() {
super.show();
System.out.println("Subject 1: " + sub1 + "\nSubject 2: " + sub2 + "\nSubject 3: " + sub3);
}
}
interface Sports {
final int sport_mark = 40;
void show_sportswt();
}
class Result extends Test implements Sports {
int total = sub1 + sub2 + sub3 + sport_mark;
public void show_sportswt() {
System.out.println("Sports marks: " + sport_mark);
}
Result(String name, int rollno, int sub1, int sub2, int sub3) {
super(sub1, sub2, sub3, name, rollno);
}
void display() {
super.show_marks();
System.out.println("Total Marks: " + total);
}
}
public class StudentResult {
public static void main(String[] args){
Scanner s = new Scanner(System.in);
System.out.println("Enter name, roll number and marks in 3 subjects:");
String name = s.nextLine();
int rno = s.nextInt();
int sub1 = s.nextInt();
int sub2 = s.nextInt();
int sub3 = s.nextInt();
Result res = new Result(name, rno, sub1, sub2, sub3);
res.display();
res.show_sportswt();
s.close();
}
}