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Core Java

How to Configure JDK in Eclipse or STS

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How to Configure JDK in Eclipse or STS ?' how to add jdk to eclipse Configuring the Java Development Kit (JDK) in Eclipse or Spring Tool Suite (STS) is a crucial step for any Java developer. Whether you are a beginner or intermediate in java development, you might face some issue in configuring JDK in your IDE such as Eclipse or STS. This guide provides a detailed step-by-step process for configuring JDK in Eclipse or STS, along with common errors and their solutions. Prerequisites Before proceeding with JDK configuration, make sure that you have the following in your system: JDK Installation: Download and install the latest version of the JDK from Oracle's official website or OpenJDK if you don't have it already. Eclipse or STS

How to add JDK 21 support in Eclipse or STS

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Eclipse not recognizing Java-21, How to add JDK 21 support in Eclipse 2023-09?, How to add JDK 21 support in Eclipse or STS, jdk21 IDE , jdk21 eclipse, eclipse jdk21, eclipse java 21, java 21 eclipse, eclipse java 21 support, eclipse for java 21, JDK 21 support in Eclipse 2023-09 - java, add java 21 to eclipse, how to add java 21 to eclipse, eclipse openjdk 21, eclipse java 21 plugin, eclipse support java 21, jdk 21 eclipse, eclipse compiler compliance level 21 not available, sts java 21, add jdk 21 to eclipse, how to add jdk 21 in eclipse Oracle has released JDK 21 in September, 2023 as an LTS version after the release of JDK 20 in March, 2023.

Java 21 New Features With Examples

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After Java 17, Java 21 is the next LTS version. Java 21 comes with various new features, some preview features, enhancements, deprecation & deletions. It is inclined to improve developer productivity and program efficiency. In this article, we will explore some of the most essential developer’s friendly Java 21 new features with examples. You may also go through Java 17 Features With Examples. Java 21 New Features Here is the list of Java 21 New Features: String Templates (Preview) [JEP-430] Sequenced Collections [JEP-431] Record Patterns [JEP-440] Pattern Matching for switch [JEP-441] Unnamed Patterns and Variables (Preview) [JEP-443] Unnamed Classes and Instance Main Methods (Preview) [JEP-445] Scoped Values (Preview) [JEP-446] Generational ZGC [JEP-439] Virtual Threads [JEP-444] Foreign Function & Memory API (Third Preview) [JEP-442] Vector

Java 17 Interview Questions & Answers Explained: Practice Test

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In this article, we will explore Java 17 Interview Questions & Answers with detailed explanation. We can also consider this article as a complete practice test for the concepts discussed. We have covered all types of questions such as concept-based, code-based and scenario-based. Some of the questions are based on features of Java 21 as well. On going through all the questions, you will have both conceptual & practical knowledge of the topics. These questions will make you aware about not only Java 17 features but other lower/higher version's features also. You must go through the explanation part of each question which will help you to clear your additional concepts. ♠ If you want to explore concepts on Java 17 new features

Guarded Pattern in Java 21 switch-case

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Guarded Pattern in Java: A Comprehensive Guide with Examples Java has undergone significant evolution over the years, and with the introduction of Java 17, several advanced features were added to the language. One such feature is the "Guarded Pattern" in enhanced switch expressions and pattern matching. This article explores the guarded pattern, its use cases, and practical examples to demonstrate its power and utility. The Guarded Pattern was introduced as a preview feature in Java 17 under JEP 406 for adding conditional logic directly in switch case labels. It was finalized in Java 21, making it a stable feature for developers. What is a Guarded Pattern? A guarded pattern in Java is a conditional pattern that allows us to define additional constraints on pattern matching.

How To Migrate From Java 8 to Java 17

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From Java 8 to Java 17, there have been several improvements in the Java coding. However, Java 17 has been released on September 21, 2021, but there are several projects in the industry which are yet to be upgraded. Undoubtedly, it's not that much easy task for the big applications where in there are billions of lines of code. In this article, we will discuss about 'How to migrate from Java 8 to Java 17' & higher versions, especially the upgradation in source code. We will also explore the new features till Java 17 in comparison to Java 8 or earlier versions. Each feature will be demonstrated with an example in Java 8, followed by its equivalent implementation in Java 17. Some

Java 17 Coding Interview Questions and Solutions

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Java 17 Coding Interview Questions and Solutions In this article we will explore various real world coding problems & their solutions using Java 17 or later versions. These questions are based on the most significant Java 17 features to help you understand how to use them effectively in real time projects. ♥ If you want to refresh concepts of Java 17 new features first, kindly visit a detailed article on Java 17 Features with examples. Java 17 Coding Interview Questions and Solutions Problem#1: Identify Leap Years- Using Ternary Conditional Operator in case statement Write a program that determines whether a year is a leap year or a common year. Use Java 17 features to write your code. Solution: public class LeapYearChecker { public static String

Collection MCQ in Java with Answers Explained

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Definitely, Collections are the most important for a Java developer. You can't imagine even a minor project in Java without the use of Collections. Moreover, in order to work in an industry level project, you must have a good grasp on Collections in Java. Apart from going through theoretical concepts multiple times, it is highly advisable that developers need much practice & revision of concepts. One of the ways to achieve this is by attempting FAQs/MCQs on collections. In this article, we will be doing theoretical practice on ‘Java Collections’ in the form of MCQs that are frequently asked in the interviews as well. Definitely, you must find this article 'Collection MCQ in Java with Answers Explained' beneficial whether it is

Interview Questions for Object Oriented Programming

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OOP (Object Oriented Programming) concepts are the essential & the most important concepts in any Object Oriented Programming Language. Any exam or interview of an OOP language is considered incomplete without these questions. Therefore, it becomes crucial to practice them thoroughly time to time. Certainly, we will be talking about the practice test of OOP concepts in this article. It helps in thorough revision of the subject and make the concept crystal clear. Here in this article, we will focus on Interview Questions for Object Oriented Programming in the form of MCQs Practice Test with a variety of questions such as concept-based, code-based, and scenario-based. At the end of each question, we will explore the detailed explanation of each question. In

Optional Class in Java 8 – A Comprehensive Tutorial

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Java 8 introduced many significant features, one of which is the Optional class. It was intended to address the common problem of dealing with null values in Java. Many people in the industry feel that you are not a real Java programmer until you haven't come across a NullPointerException. Since NullPointerException indicates the absence of a value, the null reference is the source of many problems. So, Optional class can address some of these problems. In this article, we will explore the Optional Class in Java 8, its benefits, usage, and best practices to ensure efficient and null-safe code. What is Optional Class in Java? The Optional is a class of the 'java.util' package. In simple words, Optional is a single-value container/wrapper that

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