abstract class A{ int a; int b; abstract void methodA(); class B extends A{ int a; void methodA(){ System.out.printIn("hi"); super.methodA(); O the class cannot be abstract super must be the first line O methodA cannot be overriden O super cannot be used because the method is abstract

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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abstract class A{
int a;
int b;
abstract void methodA();
}
class B extends A{
int a;
void methodA(){
System.out.println("hi");
super.methodA();
}
}
the class cannot be abstract
super must be the first line
methodA cannot be overriden
super cannot be used because the method is abstract
Transcribed Image Text:abstract class A{ int a; int b; abstract void methodA(); } class B extends A{ int a; void methodA(){ System.out.println("hi"); super.methodA(); } } the class cannot be abstract super must be the first line methodA cannot be overriden super cannot be used because the method is abstract
class A{
int a;
int b;
}
class B extends A{
int a;
public static void main(String[] args){
B obj=new B();
}
}
How do you get access to the variable "a" in class A?
use obj.a
use obj.super.a
create an object of type A and then reference the variable
O both b and c
Transcribed Image Text:class A{ int a; int b; } class B extends A{ int a; public static void main(String[] args){ B obj=new B(); } } How do you get access to the variable "a" in class A? use obj.a use obj.super.a create an object of type A and then reference the variable O both b and c
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