Difference between Static and Dynamic binding in Java

Hello guys, if you are wondering what is difference between static and dynamic binding and how it affect your program execution in Java then you are at right place. When you call a method in Java, it is resolved either at compile time or at runtime, depending upon whether it's a virtual method or a static method. When a method call is resolved at compile time, it is known as static binding, while if method invocation is resolved at runtime, it is known as Dynamic binding or Late binding. Since Java is an object-oriented programming language and by virtue of that it supports Polymorphism. Because of polymorphism, a reference variable of type Parent can hold an object of type Child, which extends Parent.

Java ArrayList Tutorials and Examples for Beginners (with Java ArrayList Cheat Sheet)

Hello guys, if you want to learn ArrayList in-depth and looking for a complete guide on ArrayList then you have come to the right place. Earlier, I have shared the best Java collection courses and in this article, I am going to share tutorials and examples to learn and master ArrayList in Java. In the last 10 years, I have written several ArrayList tutorials, touching different ArrayList concepts and many how-to-do examples with ArrayList. In this tutorial, I am giving a summary of each of them. Why? So that any Java beginner who wants to learn ArrayList in detail, can go through the relevant tutorial and learn.

How to calculate sum and difference of two complex numbers in Java? Example

From the last couple of articles, I am writing about coding exercises for beginners e.g. yesterday you learned how to write a program from matrix multiplication in Java (see here) and a couple of days back, you have learned the recursive binary search algorithm. To continue that tradition today I am going to show you how to write a program for calculating the sum and difference of two complex numbers in Java. If you remember the complex number from you Maths classes, it has two-part real and imaginary and to add a complex number we add their real and imaginary part separately, similar to subtract complex number we minus their real and imaginary part separately.

7 Projects You Can Do to Become a Frontend Master

Learning to code can be challenging, especially if you don't know where to begin. The greatest approach to improve your programming abilities is to use them to create coding projects.

Here are some programming projects to boost your confidence and make you a better developer.

Calculator app Abacus
The program that we all use on a daily basis is the calculator. The calculator is a project that is both simple and practical. Creating a calculator app can help you learn, how to build reusable components, how to use props, and how to handle states.

Blog Website Writing hand
Building your own blog doesn't only improve your coding skill, but your online presence too. If you have a blog and share content regularly, you can get a lot of visitors which can increase your online presence.

Weather App
Having a fully-featured weather app in your portfolio can help you a lot to get clients. And if you deploy this app, not only you but many people may get benefit from it

Spotify 2.0 Multiple musical notes
You can create Spotify 2.0, your own Spotify version. You can add as many features as you can and after completing, you can deploy it online :)

Movies App Film projector
You can create a movies app from scratch where you need to show movie details, posters, trailers, and cast. I believe that you will enjoy building this project.

YouTube UI Clone DVD
If you want to learn about grids, flexbox, and handling states then it would be better if you clone the YouTube UI. You don't need to 100% do the same as YouTube, you have the freedom to redesign and create your own version of YouTube.

Chat App Speech balloon
If you want to learn about Firebase, Firestore, Real-time database and etc. This project is for you, having this project in your portfolio can make your portfolio strong.

3 Difference between Web Server vs Application Server vs Servlet Containers - Apache vs JBoss vs Tomcat

In the Java EE, or J2EE or JEE world, there is a lot of confusion between terminology, which is quite evident that now we have three words (J2EE, Java EE, and JEE) to describe the same technology platform. You will see Java developers using the terms like Web Server, Application Server, and Servlet containers interchangeably but they are not exactly the same. The main difference between a Web server and an application server is that a web server is meant to serve static pages like HTML and CSS, while an Application Server is responsible for generating dynamic content by executing server-side code like JSP, Servlet, or EJB.

Top 10 Microservices Design Principles with Examples

Hello guys, today's world is about Microservices because Microservices goes hand-in-hand with Cloud Computing. They are designed better to run on Cloud Computing. Since all new Software development is most likely going to happen cloud-native, it's important for developers to learn about Microservices, particularly Java developers. To help with that, I have shared best Microservices courses and books in the past as well as 10 Microservices design patterns and in this article, I am going to share 10 common Microservices design principles. If you are wondering what is difference between patterns and principles?

10 Examples of Comparator, Comparable, and Sorting in Java 8

Hello guys, the Comparator class is used to provide code or logic for comparing objects in Java, while sorting a list of objects or a collection of objects. It's close cousin of Comparable which provides natural order sorting e.g. ascending and descending orders for numbers like int, short, long or float, and lexicographic order for String i.e. the order on which words are arranged in dictionaries. The Comparators are used while sorting arrays, lists and collections. You pass logic to compare objects and sorting methods like Collections.sort() use that logic to compare elements until they are arranged in sorted order.

How to Convert String to LocalDate, LocalTime, LocalDateTime and ZonedDateTime in Java? Example Tutorial

The JDK 8 added a new Date and Time API (JSR 310) which introduces new date and time classes like LocalDate, LocalTime, LocalDateTime, and ZonedDateTime. Now, if you have a String e.g. "2016-12-14 03:30" then how do parse it to LocalDate, LocalTime, LocalDateTime and ZonedDateTime? Similarly, if you have an instance of those classes how you can format to the String you want e.g. in dd/MM/yyyy format, or USA or UK format? Well, Java 8 provides a utility class called DateTimeFormatter which can be used to parse/format dates in Java 8. It also provides several built-in formatter e.g. ISO date format and other to facilitate formatting of dates to String.

How to convert JSON to Map in Java 8 without using third party libraries like Jackson or Gson

Hello guys, If you are working with JSON data then you may know that JSON is collection of key value pairs and that's why many times, you also need to convert them into a Map in Java. While there are many Java libraries like Jackson and Gson which provides support of parsing JSON to Java objects, there is not much support for JSON parsing or manipulation on standard JDK. While JSON parsing is still a long overdue, starting with JDK 8u60+ the built-in Nashorn engine is capable to convert JSON content into java.util.Map. No external dependencies are required for parsing JSON in to Map as you will learn in this article.

Can You Override static method in Java? Method Hiding Example

Can we override the static method in Java?

This is one of the most popular Java interview questions. The answer to this question is No, you cannot override the static method in Java because the method overriding is based upon dynamic binding at runtime and static methods are bonded using static binding at compile time. This means static methods are resolved even before objects are created, that's why it's not possible to override static methods in Java. Though you can declare a method with the same name and method signature in the subclass which does look like you can override static methods in Java but in reality that is method hiding.

Top 30 Stack and Queue Data Structure Interview Questions for Practice

Hello guys, stack and queue are two fundamental data structures which are used on many applications and algorithms. For example, you can use stack to convert a recursive algorithm to iterative one, which is more safe in production and no risk of StackOverFlowError. Similarly, queue is used in many asynchronous algorithms like producer consumer pattern or publish subscribe pattern to exchange messages. Because of that, they are also quite popular on coding interviews, particularly on Java developer interviews. In the past, I have shared 100+ data structure questions as well as String coding problems, array questions, linkedlist questions, recursion questions and even dynamic programming questions but I have not shared stack and queue related questions before.

3 ways to check if checkbox is selected in jQuery - Example Tutorial

So, you have a checkbox and you want to check if its selected or not at runtime using jQuery. If that's what you want then continue reading. A checkbox is an HTML element with type="checkbox" and checked property is used to find out whether a checkbox is selected or not. There are several ways to find if your checkbox has this property or not in jQuery e.g. by using :checked, a pseudo selector or by using is() jQuery function or by using prop() function which is available from jQuery 1.6 onward. In this article, we will see examples of these approaches to check if a check box is checked or not.

Top 10 Frequently asked SQL Query Interview Questions Answers

In this article, I am giving some examples of SQL queries which is frequently asked when you go for a programming interview, having one or two year experience in this field. Whether you go for a Java developer position, QA, BA, support professional, project manager, or any other technical position, may interviewer expects you to answer basic questions from Database and SQL. It's also obvious that if you are working for one or two years on any project there is a good chance that you come across to handle databases, writing SQL queries to insert, update, delete and select records.

Top 100 Data Structure and Algorithm Interview Questions for Java Programmers

Data structure and algorithms are a core part of any Programming job interview. It doesn't matter whether you are a C++ developer, a Java developer, or a Web developer working in JavaScript, Angular, React, or Query. As a computer science graduate, it's expected from a program to have strong knowledge of both basic data structures, like the array, linked list, binary tree, hash table, Stack, Queue, and advanced data structures like the binary heap, trie, self-balanced tree, circular buffer, etc.

How to remove duplicates from Collections or Stream in Java? Stream distinct() Example

Hello guys, if you wonder how to remove duplicates from Stream in Java, don't worry. You can use the Stream.distinct() method to remove duplicates from a Stream in Java 8 and beyond. The distinct() method behaves like the distinct clause of SQL, which eliminates duplicate rows from the result set. The distinct() is also a standard method, which means it will return a new Stream without duplicates, which can be used for further processing. Like other methods of Stream class, I mean, map(), flatmap(), or filter(), distinct() is also lazy, and it will not remove duplicate elements until you call a terminal method on Streams like collect or forEach().

5 Examples of map() and flatMap() in Java 8 Stream

The map() and flatMap() are prince and princess of functional programming in Java. They are two powerful methods of Stream API which I believe every Java developer should be aware of and should also master it. You can use map() and flatMap() for data transformation, dealing with database operations where you need to convert one object to another while saving or reading from database. You can also use them for parsing and formatting as well as when you want to remove boiler plate code and make your data pipeline concise. The map() function is used in functional programming to transform each element of Stream into another element.

Top 21 String Programming and Coding Interview Questions With Solutions

In this article, I am going to share 21 of the most common String-based Programming and Coding interview questions from Java developer interviews. These questions require you to write code to solve the problem and they are different from traditional Java String questions like how the substring method works in Java? or when to use the intern() method of String in Java? Since coding and problem solving are an important part of any programming job interview, it's imperative that you know how to solve them in time and in a pressure situation, which comes only after doing practice with the right set of questions. Since these questions are already tried and tested and appeared in many interviews, they will provide you the experience you need to crack your coding interview.

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