What is a Functional interface in Java 8? @Functional Annotation and Examples

The functional interface is one of the most important concepts of Java 8 which actually powers lambda expression but many developers don't put enough effort to understand it and spend time learning lambda expression and Stream API without first understanding the role of functional interface in Java 8. Unless you know what is a functional interface and how lambda is related to it, you can't use powerful features of Java 8 e.g. lambda expression and stream API. Without knowledge of functional interface, you won't be able to understand where you can use a lambda in the code but also you will struggle to write lambda expression the method is expecting, hence, it's important to have a good understanding of functional interface in Java 8.

Top 5 Selenium Webdriver with Java Courses for Testers and Developers to Learn Online

The days of manual testing is limited as more and more companies are shifting towards automation testing. This means all manual testing QAs needs to learn new test automation skills e.g. Selenium, Cucumber, JUnit, and TestNG to give their career a boost. If you are manual testers or non-programming testers interested in learning test automation, or a freshers/graduates who want to kick start their career in automating testing then you have come to the right place. In this article, I am going to share some of the best courses to learn Selenium Webdriver with Java and other automation testing technology e.g. JUnit, Cucumber etc.

How to write a C like Sizeof function in Java

If you have just started learning Java and came from C background then you might have noticed some difference between Java and C programming language e.g. String is an object in Java and not a NULL terminated character array. Similarly, there is is no sizeof() operator in Java. All primitive values have predefined size e.g. int is 4 bytes, char is 2 byte, short is 2 byte, long and float is 8 byte and so on. But if you are missing sizeOf operator then why not let's make it a coding task? If you are Ok, then your next task is to write a method in Java, which can behave like sizeOf() operator/function of C and returns size in bytes for each numeric primitive types i.e. all primitive types except boolean.

3 Ways to Learn Spring Core, Spring MVC, Spring Security, and Spring Boot Framework

If you are a Java developer and wants to learn Spring framework then you have come to the right place. In this article, I will share three ways to learn Spring framework, but before that let's understand what is a spring framework and why Java developers should learn Spring framework? Well, Spring is a framework which assists you to develop Java application by following some best practices, particularly the principle of dependency injection and inversion of control. As per this principle, instead of class asking for its dependency, the framework provides them at runtime.  Following these principles improves your code quality because it reduces coupling between different part of your applications e.g. between modules and classes, which makes them easier to test and develop.

Top 5 Spring Boot Courses to Learn Online for Java Developers in 2018

Hello guys, if you are interested in learning Spring Boot and looking for some awesome resources e.g. books, tutorials, and online courses to start with then you have come to the right place. Earlier I have shared some great books to learn Spring Framework, including Spring Boot (see) and today I'll share some of the best online Spring Boot courses you can join to learn Spring Boot by yourself. In the past, I was a big fan of learning from a book, but online courses have changed that completely. Now I prefer to start with an online course e.g. Spring Boot Essentials and then move on to a book like Spring Boot in Action for more comprehensive learning. Anyway, before going through those Spring Boot courses, let's first revise what is Spring Boot and it's benefits and why you should learn it.

3 Best Practices Java Programmers Can Learn From Spring Framework

There is no doubt that Spring Framework is one of the most popular Java frameworks and makes it really easy to create real-world, enterprise-grade Java applications easy by providing features like dependency injection and inversion of control. But, to be honest, Spring is much more than just another DI and IOC framework. It goes one more level to simplify many of Java APIs e.g. JDBC, JMS, Java Mail etc by providing a useful layer of abstraction. It's much more easy to work with JDBC with Spring's JdbcTempalte and other utility class. They remove most of the friction Java developer faces with respect to executing SQL statement and processing ResultSet to get the Java object they want.