Linked Questions

I was referring to the Collection Interface of Java 8, where I saw that Collection method has concrete method public boolean removeIf(Predicate paramPredicate) , but as per the definition of Interface ...

A java interface say "TestInterface" having 2 methods method1(), method2() is implemented by 100 different classes. Now I need to introduce a new method in TestInterface without making changes to ...

I was studying lambada and there was a point which states that in java 8 we can declare a method with definition in interfaces like interface Test { default String method(){ ...

Say here I have an Java interface Eat: public interface Eat { default void eat(Meat meat) {} @Deprecated default void eat(Meat meat, Mood mood) {} } And I have an abstract class ...

An interface in Java is similar to a class, but the body of an interface can include only abstract methods and final fields (constants). Recently, I saw a question, which looks like this ...

To achieve multiple inheritance, we must use interfaces, but why don't interface methods have bodies and why do they have to be overridden in the derived class? I really want a lucid answer , not ...

I'm trying to write a library of collection interfaces that implement most of the methods in the standard Collection API using the new default method syntax in Java 8. Here's a small sample of what I'...

i was studied Java in oracle website. on that, i saw the example like public class Horse { public String identifyMyself() { return "I am a horse."; } } public interface Flyer { default ...

So I'm trying to make a Settings screen and it seemed to work until I realized that the preferences won't react to clicks. I tried using onPreferenceStartFragment, but there's a strange error I'm ...

I'm learning Desgin patterns and come across very weird example in HERE. If we got a class: public abstract class AbstractFactory { abstract Color getColor(String color); abstract Shape getShape(...

I have 2 different methods that needs to be repeated across my program, e.g. methodA, and methodB. Some part of the program needs to call methodA, and some others need to call methodB, and some ...

I have assignment in java ,I need help please. I tried to solve it but I have some problem that can't understand them. Assignment is: In this exercise, use the Template method pattern to define an ...