Top 30 Core Java Interview Questions & Answers 2023
Welcome to our collection of Core Java Interview Questions! In this article, we have curated a list of essential Core[…]
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Category: Core Java
Functional Interfaces: Predicate, Consumer, Function, and Supplier
Functional interfaces provide target types for lambda expressions and method references. Each functional interface has a single abstract method, called[…]
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Generic Declarations in Java
Let us see the declaration of java.util.List interface. In the above declaration, “E” is a placeholder for the type[…]
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Polymorphism and Generics continues…
The compiler only allows the List of Type Animal to the method add. Otherwise , it throws compilation error. Is[…]
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Polymorphism and Generics in Java
Let us create the below Hierarchy of Classes. class Animal {} class Dog extends Animal{} class Cat extends Animal{} Here,[…]
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Generics: Type Erasure in Java
Before we dwell into the concept of “Type Erasure”, let us have a look into the below code. Mixing Generic[…]
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Java Generics: Type-Safe and Flexible Programming
What are Java Generics? Generics in Java provide a way to create classes, interfaces, and methods that can work with[…]
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Parallel Streams in Java 8
Please read Java 8 Stream and Java 8 Stream part 2 before going through the below piece. Streams can be executed in[…]
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Java 8 Stream continues…
Sorting public class SortExample { public static void main(String[] args) { List list =Arrays.asList(“a1”, “a2”, “b1”, “c2”, “c1”); list.stream().filter(s ->[…]
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Java 8 Stream
Java provides a new additional package in Java 8 called java.util.stream.By using streams we can perform various aggregate operations on[…]
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