Interface vs Abstract Class (general OO)
I have had recently two telephone interviews where I’ve been asked about the differences between an Interface and an Abstract class. I have … Read more
interface
Interfaces vs Types in TypeScript
What is the difference between these statements (interface vs type) in TypeScript? interface X { a: number b: string } type X = … Read more
What is the difference between an interface and abstract class?
What exactly is the difference between an interface and an abstract class? 3 38
Generic Interface
Here’s one suggestion: public interface Service<T,U> { T executeService(U… args); } public class MyService implements Service<String, Integer> { @Override public String executeService(Integer… args) … Read more
Implements vs extends: When to use? What’s the difference?
Implements vs extends: When to use? What’s the difference?
Type List vs type ArrayList in Java
Almost always List is preferred over ArrayList because, for instance, List can be translated into a LinkedList without affecting the rest of the codebase. If one used ArrayList instead of List, it’s hard to … Read more
Can a normal Class implement multiple interfaces?
A Java class can only extend one parent class. Multiple inheritance (extends) is not allowed. Interfaces are not classes, however, and a class can … Read more
Why is there no multiple inheritance in Java, but implementing multiple interfaces is allowed?
Why is there no multiple inheritance in Java, but implementing multiple interfaces is allowed?