Чашечка Java

10 Examples of print(), println() and prinf() methods In Java - PrintStream Hello guys, if you are working in Java or just started with Java then you have must come across statements like System.out.println("Hello world") to print something on console or command prompt. This is actually the first statement I wrote in Java when I started programming and at that time I didn't realize how it work and what is System and PrintStream class and what is out here but now I know and I am going to explain all this to you in this article, along with PrintStream class and its various print methods like print(), println() and particularly printf() to print various objects in Java. But,   Before we get to the 10 examples of Printstream printf() in Java, let me tell you a little bit more about what exactly Printstream is. Java Interview questions and tutorials Read: http://www.java67.com/2022/11/10-examples-of-printstream-print.html

Top 20 Artificial Intelligence Interview Questions and Answers Hello guys, if you are preparing for AI developer interview and looking for AI Interview questions and answers then you have come to the right place. Earlier, I have shared Python Interview Questions and Machine Learning Interview Questions and in this article, I am going to share 20 common Artificial Intelligence Interview Questions with answers for 1 to 2 years experienced professionals. If you have worked in the field of AI then you most likely know the answers of all of these questions but if you cannot answer then you can always check these best AI Courses to learn and improve your AI fundamental concepts. Java Interview questions and tutorials Read: http://www.java67.com/2022/06/ai-interview-questions-with-answers.html

Top 20 Bootstrap Interview Questions Answers for Web Designers and Developers Hello guys, if you are preparing for web design and development interview and looking for Bootstrap interview questions then you have come to the right place. Bootstrap is one of the most popular CSS Framework and almost all websites uses Bootstrap for their classy look and feel and bigger buttons and form elements. Earlier, I have shared HTML 5 Interview Questions and best online courses to learn HTML, CSS and Bootstrap courses and today, I am going  to share bootstrap interview questions with answers.  Here is a chance for you to make sure that you go into that Bootstrap interview with your head up high. Being ready for that interview is the major step that you can make as you seek to impress the interview panel on the interview day. Java Interview questions and tutorials Read: http://www.java67.com/2022/06/top-20-bootstrap-interview-questions.html

Chain of Responsibility Pattern in Java? Example Tutorial Hello guys, if you have been doing Java development then you must have come across design pattern, tried and tested solution of common software problem. In the past, we have looked at several popular Object Oriented Design Patterns in Java like Adapter, Decorator, State, Strategy, Template, Composite, Command, Observer, Factory, Builder, Visitor etc, and today I am going to talk about Chain of Responsibility design pattern in Java. The Chained or Chain of Responsibility Pattern is a design pattern that allows a request to be passed along a chain of objects until it is handled by one of the objects in the chain. This pattern is helpful for situations where it is not known in advance which object in the chain should handle the request, or where the request needs to be handled by multiple objects in the chain. Java Interview questions and tutorials Read: http://www.java67.com/2023/01/chain-of-responsibility-pattern-in-java.html

3 ways to convert String to JSON object in Java? Examples It's very common nowadays to receive JSON String from a Java web service instead of XML, but unfortunately, JDK doesn't yet support conversion between JSON String to JSON object. Keeping JSON as String always is not a good option because you cannot operate on it easily, you need to convert it into a JSON object before you do anything else e.g. retrieve any field or set different values. Fortunately, there are many open-source libraries which allows you to create JSON object from JSON formatted String like Gson from Google, Jackson, and json-simple. In this tutorial, you will learn how to use these 3 main libraries to do this conversion with step-by-step examples. Java Interview questions and tutorials Read: http://www.java67.com/2016/10/3-ways-to-convert-string-to-json-object-in-java.html

Алгоритм оценки математического выражения с использованием JavaFX Как обрабатывать подобные выражения с помощью кода и графического интерфейса? Фанатам Тьюринга точно будет интересно) Читать: https://habr.com/ru/articles/731244/?utm_campaign=731244

Моделирование данных с помощью записей — 5 примеров для занятых разработчиков Если говорить о синтаксисе, записи (Records) кажутся лаконичным способом создания нового типа данных для хранения неизменяемых данных. Но как насчет его семантики? Другими словами, что означает термин «запись»? Каковы его особенности и ограничения? В каких местах лучше всего использовать записи, а в каких - не стоит даже думать о них? В этой статье блога я попытаюсь ответить на эти вопросы на практических примерах для таких занятых разработчиков, как вы. Вы будете удивлены, обнаружив, насколько полезны записи при использовании с другими современными возможностями Java, такими как шаблоны записей и запечатанные классы. Давайте начнем с нашего первого примера. Читать: https://habr.com/ru/articles/724950/?utm_campaign=724950

Как пройти собеседование на позицию Java-разработчика Расскажем, как проходит собеседование у Java-разработчика, что ищут работодатели. И разберём вопросы и задачи, которые могут попасться. Читать: «Как пройти собеседование на позицию Java-разработчика»

Пошаговый путь юриста в java-разработку Предпосылки Лет восемь назад настиг меня кризис среднего возраста. Случилось это в новогодние каникулы, когда осознание скорого выхода на работу вызывало тошноту и хандру. Связано такое состояние было с осознанием бесперспективности моей профессиональной деятельности. Со временем эмоции улеглись, но осталось желание найти удаленную интеллектуальную работу. Поскольку Сеть соблазнительно пестрила объявлениями о потенциальных заработках разработчиков, кроме сферы программирования, других вариантов для реализации задуманного я не увидела. Читать: https://habr.com/ru/articles/731108/?utm_campaign=731108

Top 10 Projects to Learn Front-End Web Development Hello guys, If you are looking for ways to learn Front-End Web Development, you have come to the right place because all of what you want is right here. You just have to keenly go through this article till the end and you will get what you need.  Front-end web development is a popular field that involves creating the user interface and experience of websites and web applications. It is an ever-evolving field that requires developers to stay up-to-date with the latest tools, technologies, and trends. One of the best ways to learn front-end web development is through hands-on projects. In this article, we will explore the top 10 projects that can help you learn front-end web development and enhance your skills in HTML, CSS, JavaScript, and other related technologies. Java Interview questions and tutorials Read: http://www.java67.com/2023/04/top-10-projects-to-learn-front-end-web.html

How to use @JsonCreator and @JsonPropertOrder Jackson JN Annotation in Java? Examples Hello guys, if you are dealing with JSON in Java then you may have come across Jackson, one of the popular JSON library in Java. Jackson provides many cool annotations to serialize and de-serialize JSON to Java object and vice-versa. Earlier, I have showed you 3 ways to convert JSON to Java object and 10 free Jon Tools for programmers and in this article, we will deep dive into two popular Jackson annotations @JsonCreator, @JsonProperty, and @JsonProperOrder. But, Before I tach you exactly how you can use the @JsonCreatorannotation, let me briefly tell you a bit more about what Java really is. Java Interview questions and tutorials Read: http://www.java67.com/2022/12/how-to-use-jsoncreator-jackson-in-java.html

Top 5 Functional Interface Every Java Developer Should Learn Hello guys, functional interface in Java are an important concept but not many developer pay enough attention to them. They learn lambda and method reference but the functional interface from java.util.function package. While its not really possible to learn all the functional interfaces on that package but you can learn a few more commonly used ones like Predicate, Supplier, Consumer etc and that's what you will learn in this article.  But, before we get to the top 5 functional interfaces that every Java developer should learn, let me tell you a bit about what Java really is. Java Interview questions and tutorials Read: http://www.java67.com/2022/12/top-5-functional-interface-every-java.html

Difference between Class and Object in Java? Example Class and Object are two pillars of Java and any Object oriented programming language. There are multiple ways you can describe Class in Java, I will start with how I remember class from my college Days. That time, I used to remember that "A class is a blueprint to create object" and that's how I answer during viva or exam. While I know what is a blueprint, I didn't really understand what a class can do. Later, when I started coding, I learned about data types like int data type to hold integer values. String data type to hold text values. Java Interview questions and tutorials Read: http://www.java67.com/2022/06/what-is-class-and-object-in-java-and.html

How to convert List Of of Object to Map of Object (key, value) In Java? Example Tutorial Hello guys, if you have a list of object and you want to conver into Map of object or key value pair then you can use different ways like looping over list and then adding values to map, or you can use Collectors.toMap() by using Stream API, You can even use flatMap() function if you want to convert list of one type of object to Map of another type of object. All this is possible and I will show you code example of how to do that in this article, But, before we get into the process of how you can convert a list of one object to another in Java, let me tell you a bit more about what Java really is. Java Interview questions and tutorials Read: http://www.java67.com/2022/12/how-to-convert-list-of-of-object-to-map.html

What is WeakHashMap in Java? HashMap vs WeakHashMap Example Tutorial Hello friends, we are here today again on our journey to Java. I hope everyone is fine and ready to board our train of knowledge. Today we are gonna learn something very interesting and very exciting. Today's topic will definitely be very useful in coding and programming. This topic would surely decrease your time complexity, and space requirements for any task very significantly :p So what's the wait? Let's start! Java Interview questions and tutorials Read: http://www.java67.com/2021/10/how-to-use-weakhashmap-in-java-example.html

JDBC - Difference between PreparedStatement and Statement in Java? Answer If you have worked with database interfacing with Java using JDBC API then you may know that the JDBC API provides three types of Statements for wrapping an SQL query and sending it for execution to the database, they are aptly named as Statement, PreparedStatement, and CallableStatement. First, a Statement is used to execute normal SQL queries like select count(*) from Courses. You can also use it to execute DDL, DML, and DCL SQL statements. Java Interview questions and tutorials Read: http://www.java67.com/2018/03/jdbc-difference-between.html

Can you make a class static in Java? Example This is one of the tricky questions in Java because there is no straightforward. Yes and No answer here. You cannot make a top-level class static in Java, but Yes, you can make a nested class static in Java. In fact, it is even advised (see Effective Java) to prefer a nested static class in Java to normal inner classes. Now, the question comes what is a top-level class, and what is a nested class in Java? Well, you can declare multiple classes in a single Java source file. A class is said to be the top-level if it is not inside any other class, and a class that is inside another class is known as a nested class. You can create a nested class inside another top-level or another nested class in Java. This is the class that can be static in Java. Java Interview questions and tutorials Read: http://www.java67.com/2017/06/can-you-make-class-static-in-java.html

Difference between Fixed and Cached Thread pool in Java Executor Famework There are mainly two types of thread pools provided by Javas' Executor framework, one is fixed thread pool, which starts with fixed number of threads and other is cached thread pool which creates more threads if initial number of thread is not able to do the job. The newCachedThreadPool() method is used to create a cached pool, while newFixedThreadPool() is used to construct a thread of fixed size.Cached thread pool executes each task as soon as they are submitted, using an existing thread if its idle or creating new threads otherwise, while in case of fixed thread pool, if more tasks are submitted then idle threads then those task are put into a queue and later executed once any other task has finished. Java Interview questions and tutorials Read: http://www.java67.com/2022/05/difference-between-fixed-and-cached-thread-pool.html

Difference in Method Overloading, Overriding, Hiding, Shadowing and Obscuring in Java and Object-Oriented Programming? Hello guys, today, I am going to explain a couple of fundamental object-oriented programming concepts in Java, like Overloading, Overriding, Hiding, Shadowing, and Obscuring. The first two are used in the context of a method in Java while the last three are used in the context of variables in Java. Two methods with the same name and same class but the different signature is known as overloading and the method is known as an overloaded method while a method with the same name and same signature but in parent and child class is known as overriding. On the other hand,  Hiding is related to overriding since the static and private method cannot be overridden, if you declare such methods with the same name and signature in parent and child class then the method in the child class will hide the method in the parent class. Java Interview questions and tutorials Read: http://www.java67.com/2019/04/difference-between-overloading-overriding-hiding-shadowing-and-obscuring-in-java-oop.html