Чашечка Java

Handling REST exception in Spring Boot Application? Example Tutorial Hello everyone, in this article we are going to take a look at how to handle REST API exceptions in Spring Boot. It is crucial to handle errors correctly in APIs by displaying meaningful messages as it helps API clients to address problems easily. What happens if we don’t handle the errors manually? By default, the spring application throws a stack trace, which is difficult to understand. Stack traces are mainly for developers hence it is useless for API clients. Java Interview questions and tutorials Read: http://www.java67.com/2023/04/handling-rest-exception-in-spring-boot.html

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How to use Recursion in JavaScript? Example Tutorial If you are a programmer, you may have come across a term called “recursion”. In programming, several techniques are used to solve a problem. Recursion is one such technique. It allows you to break a big problem into smaller parts and then solve those smaller parts. It's also one of the useful techniques to solve dynamic programming-based problems and that's why it's very very important for any programmer or developer preparing for coding interviews.  Recursion is not limited to a specific programming language. It can be performed using Java, JavaScript, C, or any other programming language. In this article, we will learn what is recursion and how to perform it using JavaScript. Java Interview questions and tutorials Read: http://www.java67.com/2021/11/how-to-use-recursion-in-javascript.html

Why Every Developer should learn Cloud Computing (AWS, AZURE or GCP) in 2023 Hello guys, if you are wondering whether you should learn Cloud Computing in 2023 then my only advice to you is just learn it. It doesn't matter whether you are a Developer or DevOps, sooner or later you will have to learn Cloud,there is no escape here and learning now is your best option. Now most of the job description for Java developers list that they will prefer candidates with familiarity and experience working in cloud platforms like AWS or Azure and if you don't have them then you will be left behind. Nowadays, whenever I open LinkedIn, I see people on my network getting AWS certified or Azure Certified or Google Certified and its not a coincidence, they are doing because their job need Cloud skills and their companies are also encouraging them to learn Cloud and become a certified Cloud Developers and that's the main reason I suggest every programmer and developer to learn about Cloud computing. Java Interview questions and tutorials Read: http://www.java67.com/2023/01/why-every-developer-should-learn-cloud.html

How to Prepare for AWS certified Security Specialty Exam in 2023 Hello guys, if you are preparing for AWS Certified Security Specialty exam in 2023 then you have come to the right place. Earlier, I have shared best AWS Security specialist courses and my thoughts and courses on cracking AWS Solution architect exam and today, I will share how you can prepare for AWS Security certification in depth. The AWS Certified Security Specialty" certification is one of the most esteemed credentials in the industry. There is now an official designation for data analysts on their resumes and applications. Two of today's most hotly debated topics, cloud computing, and security, come together with the AWS Security Specialty certification. If you're in the security field, bringing your skills to the cloud is a natural next step in your career development. Java Interview questions and tutorials Read: http://www.java67.com/2022/04/how-to-prepare-for-aws-certified-secu.html.html

Top 20 TypeScript Interview Questions and Answers for Web Developers Hello guys, if you are preparing for Web developer Interview where TypeScript is mentioned as required skill then you should prepare TypeScript well and if you are looking for common TypeScript interview questions then you have come to the right place. Earlier, I have shared common JavaScript Questions, HTML Questions, CSS questions and Web Development questions and in this article, I am going to share 20 TypeScript interview questions with Answers. I have tried to cover as many TypeScript concepts as possible using these questions and provided to-the-point answers for quick revision. If you have worked as TypeScript developer or used TypeScript in past then you can easily answer these questions but if you cannot then you can always join these best TypeScript coursesto learn and revise TypeScript concepts quickly. Java Interview questions and tutorials Read: http://www.java67.com/2022/07/typescript-interview-questions-with.html

What is HashSet in Java? Example Tutorial Hello guys, we meet again for our journey of learning Java. Today, we are gonna learn something very fruitful and easy. Hope you all are excited and ready. I would recommend you guys to go through the HashMap or TreeMap article which goes over hashing as this topic has some of its features. So, What's the wait? Let's start! Suppose you guys are given the task of storing car names (yes, I love cars :p). Now, how would you store it? If you guys have some questions, here are the requirements. The car names may increase over time. So, logically, an array is not what we are looking for. Java Interview questions and tutorials Read: http://www.java67.com/2021/11/how-to-use-hashset-in-java-set-example.html

What is Blocking Deque in Java? How and When to use BlockingDeque? Example Tutorial Hello friends, we meet again here today on our journey to Java. Before we continue forward, let me inform you guys that today's topic is in continuation of our Java Deque topic. If any of you guys have not read the Java Deque tutorial, go ahead and read that one first. Though there is no such limitation of this article, it is recommended to have gone through the basics of Deque and our previous post. So, I guess now we will continue our Deque topic and today we will discuss something very interesting. Today we are gonna jump into the advanced topic of Deque and how we can leverage the functionality Java has provided for a better and more robust application building. Java Interview questions and tutorials Read: http://www.java67.com/2022/02/how-to-use-blocking-deque-in-java.html

How to find 2nd, 3rd or kth element from end in linked list in Java? Example [Solved] Hello guys, today, I am going to discuss one of the important linked list based coding problems from interviews -how to find the Kth element from the end? This question is also asked as to how do you find the 3rd element from the last of a singly linked list in one passor write a Java program to find the 5th element from the tail of a given linked list in one iteration. In this article, you will learn the programming technique so that you can solve any variant of this problem, I mean the Kth node from the tail problems and some linked list-based challenges. The difficulty in this question is that you need to solve the problem in one iteration or one pass. This means you cannot traverse the linked list again. I mean you cannot go till the end then traverse back to the Kth element. Java Interview questions and tutorials Read: http://www.java67.com/2020/04/how-to-find-kth-node-from-end-in-linked-list-java.html

Top 40 Perl Interview Questions and Answers for Programmers Hello guys, if you have been working as a professional Software developer then you may have heard about Perl, one of the most powerful scripting languages. Perl is really great when it comes to creating reports, write scripts to analyze text, and connect to DB, load data and generate reports. Perl is even more important for IT support professionals, business analysts, and IT professionals who need to work in the field of operations. That's why Perl questions are quite common during Software developer and IT support interview, especially if the Job description mention Perl or you have added Perl as a skill in your resume or LinkedIn Profile. Java Interview questions and tutorials Read: http://www.java67.com/2020/05/perl-interview-questions-and-answers.html

3 Examples of flatMap() of Stream in Java Hello guys, if you are doing Java development then you must have come across the flatMap() method on Stream and Optional Class. The flatMap() method is extension of map() function as it does both flattening and mapping (or transformation) instead of just transformation done by map() method. I have explained the difference between map() and flatMap() earlier in detail, but just to revise, let's revisit it. If you have a list of String e.g. {"credit", "debit", "master", "visa"} then you can use the map() method to get a list of integer where each value is length of corresponding String e.g. list.stream().map(s -> s.length()) will produce {6, 5, 6, 4}. This is called transformation because you have transformed an stream of String to a Stream of integer. Java Interview questions and tutorials Read: http://www.java67.com/2023/01/3-examples-of-flatmap-of-stream-in-java.html

Java News Roundup: JEPs for JDK 21, MicroStream to Eclipse, Helidon, Piranha, Gradle 8.1 This week's Java roundup for April 10th, 2023 features news from OpenJDK, JDK 21, Spring Framework and Spring Data updates, GraalVM Build Tools 0.9.21, MicroStream becomes an Eclipse Project, Micronaut 3.8.9, Helidon 4.0.0.Alpha6, Hibernate ORM 6.2.1, Micrometer Metrics 1.11.0-RC1, 1.10.6 and 1.9.10, Micrometer Tracing 1.1.0-RC1 and 1.0.4, Piranha 23.4.0, Project Reactor 2022.0.6 and Gradle 8.1. By Michael Redlich Read: https://www.infoq.com/news/2023/04/java-news-roundup-apr10-2023/

How to Accept and Produce JSON as a response in Spring Boot? Example Tutorial Hello everyone, welcome to the blog post. In this short article, we are going to take an in-depth look at how to consume and produce JSON responses using a widely appreciated Java framework i.e. Spring Boot. As we all know Spring Boot is a framework designed to build a secure web application, microservice, REST API, and production-ready spring application. Modern-day application deals in a large amount of data, which they share in JSON format. A JSON is a standard plain text-based representation of structured data. It is one of the popular formats for data transmission over the internet. Due to its user-friendly syntax and lightweight, it helps in the process faster. Java Interview questions and tutorials Read: http://www.java67.com/2023/04/how-to-accept-and-produce-json-as.html

Ни одно задание не будет провалено: Spring Boot и Quartz в режиме cluster Туториал по настройке библиотеки Quartz в режиме кластера в Spring Boot приложении с возможностью отслеживания и управления жизненным циклом задания, в том числе переносом задания в случае необходимости. Читать: https://habr.com/ru/articles/729332/?utm_campaign=729332

How to fix cannot determine embedded database driver class for database type NONE Hello and welcome to the blog post. Today we are going to take a look at a frequently encountered problem in Spring Boot Application. If you are reading this, I'm going to assume that you saw the problem"Cannot determine embedded database driver class for database type NONE" while executing a Spring Boot application. We will understand, when this error appears. For this we will create a simple Spring Boot project as shown below. It demonstrates how I encountered the problem "Cannot determine embedded database driver class for database type NONE". Java Interview questions and tutorials Read: http://www.java67.com/2023/04/how-to-fix-cannot-determine-embedded.html

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