All Questions
5 questions
0
votes
5
answers
2k
views
Comparing Java objects with different member variables
I have a base class "People" which two other classes inherit from: Employee and Student. The Student class includes a GPA (type double) and the Employee class does not. I have an ArrayList ...
- 19
1
vote
4
answers
1k
views
Why have separate keywords for 'extends' and 'implements' in Java? [closed]
Short answer that I've come to accept:
Firstly, it helps with readability, being able to see which is the superclass apart from interfaces. Secondly, though 'extends' and 'implements' do the same ...
- 456
14
votes
5
answers
8k
views
Inheritance vs additional property with null value
For classes with optional fields, is it better to use inheritance or a nullable property? Consider this example:
class Book {
private String name;
}
class BookWithColor extends Book {
private ...
0
votes
3
answers
48k
views
Using super keyword to access super class members
I have following questions about the super keyword in java:
I have a code below with classes:
A Extends no class contains integer variable i
B Extends class A contains integer variable i
C Extends ...
- 201
66
votes
11
answers
65k
views
In Object-Oriented Programming, why is it generally desirable to split a program into multiple classes? [closed]
After studying Programming through books, they have taught me concepts such as inheritance, but never explain how splitting a program into multiple classes helps with anything. Yet, many books seem to ...
- 1,085