Чашечка Java

How to find largest and smallest number from integer array - Java Solution Hello guys, if you have gone through any coding interview or have done some professional Software development then you know that a good understanding of array data structure is crucial for any software developer but it doesn't come for free, you need to spend time and effort. The best way to develop this understanding by solving coding problems and there are lots of programming exercisesbeginners can do. One of them is writinga program to find the smallest and largest number in an integer array. Java programmers are no different than others, so they can do this program in Java, not just to understand array but also different relational operators available in Java. Java Interview questions and tutorials Read: http://www.java67.com/2014/02/how-to-find-largest-and-smallest-number-array-in-java.html

Difference between GET and POST Request in HTTP and REST APIs HTTP Protocol supports many methods to retrieve data from the server or perform any operation on the server, like upload data, delete the file, etc. In total, the HTTP protocol supports the following methods, GET, POST, PUT, DELETE, HEAD, DELETE, OPTIONS, and TRACE, and the HTTP 1.1 reserves technique called CONNECT for future use.  GET, and POST is two of the most common HTTP methods you would hear or work on the web. Though both can be used to send and receive data from client to server, there are somecrucial differences between the GET and POST in HTTP, which will help you to understand when you should use GET vs. POST while writing your client and server application. Java Interview questions and tutorials Read: http://www.java67.com/2014/08/difference-between-post-and-get-request.html

How to Prepare for Java Certifications like OCAJP, OCPJP, or Java SE 11 Developer? There is No doubt that Oracle's Java certification is one of the most valuable certifications for the IT industry and helps you to get a better job, better pay, and a better rise in your current salary. It also improves your recognition and job prospects because many big clients demands certified Java programmers for their mission-critical applications. Because of enormous popularity and usefulness, many Java developers and computer science graduates aspire for Java certifications. I often receive queries like, what is the best way to prepare for Java certifications like OCAJP or OCPJP? Java Interview questions and tutorials Read: http://www.java67.com/2017/05/how-to-prepare-for-java-certifications.html

Top 5 Books to Learn Groovy and Grails for Java Programmers - Best of Lot If you want to learn Groovy and Grails and looking for the best resources then you have come to the right place. Earlier, I have shared some of the must-read Groovy books, and today, I'll share some of the best books to learn Grails for Java developers. Grails is a web application development framework completely written in Groovy. The Grails and Gradle framework are built using the Groovy language. Grails is the framework to develop a web application using Groovy. The concepts within Grails, like interceptors, tag libs, and Groovy Server Pages (GSP) are very similar to what we have in Java. Java Interview questions and tutorials Read: http://www.java67.com/2021/03/best-grails-groovy-books-for-java-programmers.html

How to Print all leaf Nodes of a Binary tree in Java [ Coding Interview Questions] This is another interesting coding problem that is based on a binary tree and mostly asked beginner programmers. If you have some experience in solving binary tree-based problems then it's rather easy to solve because, like many other binary tree algorithms, you can use recursion to print all leaf nodes of a binary tree in Java. Since the tree is a recursive data structure, you can apply the same algorithm to both the left and right subtree. In order to solve this problem, the first thing you should know is what is a leaf node because if you don't know that then you won't be able to solve the problem. Well, a leaf node is the one whose left and right child nodes are null. Java Interview questions and tutorials Read: http://www.java67.com/2016/09/how-to-print-all-leaf-nodes-of-binary-tree-in-java.html

12 Must Read Advance Java Books for Intermediate Programmers - Part 1 I often receive loads of email about Java books and courses recommendations, something like, I have 2 years of experience in Java and Spring, which Java books should I read to become an expert Java programmer, or I have 5 years of experience in core Java and want to become a Java expert, which books or courses should I refer? These are just some of the examples, but most of the requests are like that. It's interesting that most of the email I receive is not from beginners, I mean those who want to learn Java from scratch, but, from Java developers who have 2 to 3 years of experience. I call them Intermediate Java programmers because they are in the state of their career where they know how to program in Java, but they are not experts yet. Java Interview questions and tutorials Read: http://www.java67.com/2016/06/12-must-read-advance-java-books-for-intermediate-programmers.html

Top 5 Books to Learn Java 8 and Functional Programming - Best of Lot Hello guys, recently, I asked my followers on Twitter which Java version they are using in production, and most of them said Java 8 and Java 11. This is not surprising at all because many of the Java and Spring Boot projects I have worked on also using Java 8 in production. After close to 7 years of Java 8 release, it is still the most used Java version in production which is not surprising though. Even though we now have Java 20 but many programmers are yet to learn Java 8 and I often receive queries like which books to read or which online courses to join to learn essential Java 8 features like lambda expression, stream, and functional programming. Java Interview questions and tutorials Read: http://www.java67.com/2015/07/5-books-learn-java-8-functional-programming.html

Top 10 Programming Books for Coders of All levels - Must Read Hello guys, Coding is one of the most essential skills for programmers, and if you want to survive as a programmer, you must improve your coding ability. Gone are the days when you can get a software development job without having you write a single line of code and then somehow survives in the role by doing support, coordination, and other non-coding activities. Companies, both big and small, are increasingly testing the coding skills of candidates before hiring. It's widespread for programmers to pass a coding test before a telephonic round of interview. Java Interview questions and tutorials Read: http://www.java67.com/2018/01/10-must-read-books-for-coders-of-all-level.html

Top 5 Books to Learn Angular for Beginners - Best of Lot Hello guys, if you have ventured into the Modern frontend development world then you may have heard about the Angular framework, one of the leading JavaScript frameworks for web development using Model view Design Pattern. The first version of Angular to be ever built was AngularJs, which was developed by Google. It is an open-source platform that is powered by JavaScript for developing mobile and web apps and was first released in 2010 by Google. It was aimed at making web design and development easier for programmers. Java Interview questions and tutorials Read: http://www.java67.com/2020/03/top-5-books-to-learn-angular-for-beginners.html

История учебы Васи и конечный автомат на SQL После выступления на PgConf2023 у меня на выходных появилось время на реализацию идеи, как реализовать логику конечного автомата на SQL в PostgreSQL. Идея применима к любой СУБД, поддерживающей агрегатные функции, определяемые пользователем. И самое забавное, что в одной из самых популярных аналитических баз данных ClickHouse, эту задачу не нашел как вообще можно решить без Python на чистом SQL, хоть автосгенерированном. Скоро сказка сказывается, да не скоро дело делается... Жил был Вася. И устои в обществе где он жил, были описаны с помощью конечного автомата. А конечный автомат мудрости - finite-state machine (FSM) был задан в виде таблицы переходов, в TSV формате: Читать: https://habr.com/ru/articles/728196/?utm_campaign=728196

Производительность и стабильность Knime на слабых компьютерах Наступают времена, когда офисному сотруднику недостаточно знать Word и Excel в качестве минимального обязательного базиса программных продуктов. No-code/Low-code платформы и продукты - вот что незаметно становится обязательным для владения каждым. Эти платформы есть самый быстрый на сегодня способ без изучения языков программирования овладеть навыками использования искусственного интеллекта, машинного обучения, анализа big data, причём очень бигдата - на сотни миллионов строк. Платформа Knime - один из таких инструментов. На первый взгляд это улучшенный Excel+BI. Но, когда посмотришь поглубже его возможности, то, очевидно - это обязательный инструмент будущего, по крайней мере для тех кто не являясь программистом хочет получить навыки как у программиста. Для простоты - Knime это "графическое" программирование. Берёшь квадратики, размещаешь в виде бизнес-процесса, соединяешь их между собой и оп! - уже провёл анализ маркетингового плана или парсинг сайтов конкурентов или анализ рекламных текстов с помощью NLP. Или, даже строишь приборную доску управления производственного предприятия будучи простым менеджером/инженером. Или ведёшь обработку научных данных. Knime позволяет, конечно, и код писать, причём на трёх языках Python, Java, R, но это не обязательно. Бизнес-процессы знаешь, рисуешь? Вперёд! Разумеется, при работе с огромными массивами данных, требования к компьютерным ресурсам возрастают. И что делать, если вам доступен простенький офисный или домашний компьютер? Или, если вы видите что аренда облачного ресурса на месяц дороже, чем купить компьютер с 64Гб оперативной памяти и процессором гоняющим Atomic Heart или Hogwartz Legacy на среднемалках? Читать: https://habr.com/ru/articles/728204/?utm_campaign=728204

Продвинутый GraphQL со Spring Boot В этой статье вы узнаете, как использовать Spring for GraphQL в своем приложении Spring Boot. Spring for GraphQL — относительно новый проект. Версия 1.0была выпущена несколько месяцев назад. До этого релиза нам приходилось подключать сторонние библиотеки, чтобы упростить реализацию GraphQL в приложении Spring Boot. Я уже описал два альтернативных решения в своих предыдущих статьях. В следующей статье вы узнаете о проекте GraphQL Java Kickstart. В другой статье вы увидите, как создавать более сложные запросы GraphQL с помощью библиотеки Netflix DGS. Мы будем использовать очень похожую схему и модель сущностей, как и в этих двух статьях о Spring Boot и GraphQL. Если вы хотите попробовать сделать это самостоятельно, вы всегда можете посмотреть на мой исходный код. Для этого вам нужно клонировать мой репозиторий GitHub. Затем просто следуйте моим инструкциям. Читать: https://habr.com/ru/articles/720360/?utm_campaign=720360

What is @Component annotation in Spring? What does it do? Hello guys, One of the main reason many people use Spring Framework is Dependency injection and auto-wiring, which means you don't need to write code to create and inject dependency, Spring will do it for you. But does it do it and how @Component annotation helps? Well, In Spring, the @Component annotation is used to mark a class as a Spring bean that should be managed by Spring's Inversion of Control (IoC) container. When a class is annotated with @Component, Spring automatically scans for such components during application startup and creates instances of these components that can be used for dependency injection. The @Component annotation is the foundation for other stereotype annotations in Spring, such as @Service, @Repository, and @Controller, which are specializations of @Component. These annotations are used to further specify the role and purpose of a component in a Spring application. Java Interview questions and tutorials Read: http://www.java67.com/2023/04/what-is-component-annotation-in-spring.html

Java News Roundup: String Templates, Quarkus, Open Liberty, PrimeFaces, JobRunr, Devnexus 2023 This week's Java roundup for April 3rd, 2023 features news from OpenJDK, JDK 21, Quarkus 3.0.0.CR2 and 2.16.6.Final, Open Liberty 23.0.0.3, Apache Camel 3.18.6, PrimeFaces 12.0.4, JHipster Lite 0.31.0, JobRunr 6.1.3, Gradle 8.1-RC3 and Devnexus 2023. By Michael Redlich Read: https://www.infoq.com/news/2023/04/java-news-roundup-apr03-2023/

​Реально ли в 2023 получить диплом государственного образца, обучаясь онлайн? Конечно, если делать это в НИУ ВШЭ. Они объединили все преимущества очного и онлайн-образования и разработали онлайн-программы, которые эффективно сочетают в себе теорию и практику. Кроме диплома вы получите большое количество практики, обширные знакомства в сфере обучения и отсрочку от армии. Выберите подходящую для вас программу в одном из лучших вузов страны по версии Forbes и оставляйте заявку: https://tprg.ru/UxPC Реклама НИУ «ВШЭ» LjN8KWcDY

How to fix "not a managed type exception" in JPA? [Solution] Hello folks, JPA (Java Persistence API) is a widely used technology in Java applications for object-relational mapping (ORM) and working with databases. However, when using JPA, you may encounter the"not a managed type" exception, which is a common error that occurs when JPA fails to recognize an entity class as a managed type. This exception can occur due to various reasons, such as incorrect package or class names, missing annotations, ormisconfiguration of JPA settings. Fixing this error requires identifying the root cause and taking appropriate steps to resolve it. In this article, we will explore different strategies and solutions to fix the "not a managed type" exception in JPA, helping you overcome this hurdle and successfully work with JPA in your Java applications. Java Interview questions and tutorials Read: http://www.java67.com/2023/04/how-to-fix-not-managed-type-exception.html

Can Abstract class have Constructor in Java? Interview Question Yes, an abstract class can have a constructor in Java. You can either explicitly provide a constructor to the abstract class or if you don't, the compiler will add a default constructor of no argument in the abstract class. This is true for all classes and it also applies to an abstract class. For those who want to recall what is an abstract class in Java, it's a class that can not be instantiated with the new() operator or any other way. In order to use an abstract class in Java, You need to extend it and provide a concrete class. An abstract class is commonly used to define a base class for a type hierarchy with default implementation, which is applicable to all child classes. Java Interview questions and tutorials Read: http://www.java67.com/2013/02/can-abstract-class-have-constructor-in-java.html