Java

Hey Tea lovers! This post is about garbage collectors in Java. This is the continuation of the post series “Get Ready to Deep Dive Java Memory Management”. In Java memory management, a Garbage collector is the process by which Java programs perform automatic memory management. This is a more complicated process than just garbage collecting and freeing up memory. The garbage collector is expensive to process which leads to a stop-the-world event. ...

Hey, Tea Lovers! Today we will talk about Java Memory Management. Memory management is the process of the allocation & de-allocation of objects from a memory and it’s done automatically with the help of a garbage collector. As Java programmers, we do not bother about java memory management as Java has an automatic garbage collector that works in the background to clean up unused objects and free up java memory. ...

Hey, Tea Lovers! Today we will talk about the Optional class in Java 8. But before that, Did you know that Tony Hoare, The inventor of the null reference, has said that the null reference is his “Billion Dollar Mistake”? Since NullPointerException is the most common and frequently appeared error compared to others, especially for Java developers. I have seen people wrapping each code block in a try-catch to handle this sneaky fool. That’s how much we are scared of this exception. ...

Hey! Tea Lovers! We will discuss How to use Lombok in our code. It’s the continuation of our previous post " Say Good-Bye to Boilerplate Code with Lombok: Part 1-Installation". In which we looked at what Lombok is and how to install it in Eclipse or IntelliJ IDEA. Now, we will look at how we can use the Lombok library in our code. How to Use Lombok To use Lombok please be ready with the installation and dependencies which we discussed in the previous part. ...

Hey! Tea lovers! Before talking about Lombok, what are the things that irritate us Java Developers the most? Well yes, hearing “Java is dying” from a Python developer is irritating but it is the second thing. The first one is the boilerplate code. We write it almost every time. Setters and getters, constructors, toString, and many others for simple POJO classes. Of course, IDE can generate this code for you but again, your simple POJO class then becomes redundant. And the only things that matter in the POJO are the fields, so why not write fields only and let the compiler handles the rest of the things? And that’s where Project Lombok comes into the picture. ...

Hey! tea lover! This post is not a tutorial, just code samples of different sorting algorithms you can see before going to the interview. I have written the algorithms in Java. There is little to no explanation, just pure simple code for you to quickly glance through it. The purpose of making this is to put all the sorting algorithms Java code in one place only. You can see the whole Data Structure and Algorithms project on GitHub. ...

Hey! Tea lovers. Let us talk about the first baby step we take into the Java world. And that’s the installation of Java Development Kit aka JDK. There are only 3 steps to set up JDK, without the installer. You can have multiple versions of JDK at the same time and switch between them very easily. Prepare your tea and let us see those 3 magical steps. TL;DR This post discusses the installation of JDK on the Windows system. We will be discussing other operating systems such as Ubuntu and Centos. The JDK I am utilizing for the aforementioned post is OpenJDK 13. We have JDK 14 as well but it’s an early release and might have bugs. So we won’t be using that. ...

IntelliJ IDEA, by far, is the most productive and beautiful IDE out there for Java development. It features so many shortcuts and useful utilities, that I bet even the creators would have forgotten. These IntelliJ IDEA shortcuts can skyrocket your productivity while coding. To be honest, you don’t need to learn every shortcut, only a handful of them are used daily, and the following commands are even more common. These select few are enough for the everyday life of a programmer. ...

Hey, tea lovers! Have you ever heard about connection pooling in JDBC or HikariCP? If not, no worries at all, that is what this post is all about. We will talk about all the things about the JDBC connection pool and its implementation using HikariCP. HikariCP is one of the fastest connection pooling available in the market for JDBC connections. It makes connection pooling very easy. get ready to learn more about this beast. But before, make your tea to sip and learn. And for the example used in the post, you can find it on GitHub here or the full project here. ...

Hey Tea Lovers! In this post, we will be talking about an unsung hero of the Java world, the Stream API which was added to Java 8 and has changed the way we do programs in java and how! It added neatness as well as made the program more readable. It helps you do functional programming in Java. Without any further ado, let us read more about this jewel. What is Stream API The Stream API, included in Java 8, is utilized for processing collections of objects. It is the flow of Objets on which various methods get applied in the pipeline to have the result. Simply put, it flows through the given Collection<Object> and applies the different methods on the Object to aggregate them into the desired result without affecting the original Object. ...