Best java ide 2020

Introduction To Java IDE

Java is one of the popular and powerful programming languages as well as a platform. It is a high level and secured programming language that is used across several platforms in the world like Web applications, Android, Big Data, Banking Domain, Information Technology, Financial Services, etc.


To implement Java programming language we need certain environments where the user can develop codes and applications. Here comes the role of Java Integrated Development Environment (Java IDE). The need for Java IDE was felt as developers were facing issues while coding a huge application.

Huge applications will have a lot of classes & files, and thus, it gets difficult to debug them. With IDE, proper project management can be maintained. It provides hints on code completion, syntax errors, etc.

The Integrated Development Environment (IDE) is a software application that provides developers a platform with many features & facilities to develop Computer applications, Web pages, Tools, Services, etc.

The IDE tool will include text editors, debuggers, compilers, some features, and tools that will help in automation, testing and analyzing of an application development flow.

In simple terms, IDE allows developers to convert their logical code into some useful software applications.

Working Principle Of IDE

IDE follows a simple working principle that allows the developers to write logical code in its environment editor. Its compiler feature tells where all the errors are. The debug feature helps to debug the complete code and rectify errors.

Lastly, it helps in automating some parts and also assists to build a whole new software application. It is capable of supporting Model-Driven Development as well.

Core Functions Of IDE

  • IDE should possess code completion capability for identifying the Java language functions and keyword.
  • It should have strong resource management that helps to identify missing resources, headers, libraries, etc.
  • A good debugging tool to test the developed application completely.
  • Compile and build features.

Advantages:

  • IDE takes very minimal time and effort as the entire concept of IDE is to make development easier and faster.
  • It follows certain company standards, hence the working principle will be the same throughout and helps the coders.
  • It comes with good project management tools and documents to automate many things.
  • Useful in simplifying the development of database applications.
  • It has features to develop a good user interface with text boxes, buttons, etc.

Disadvantages:

  • IDE comes with a complex learning curve, thus having some expertise on these tolls will not be easy.
  • It is not capable to remove bad code, design, and errors on its own. So the developer needs to be very careful while coding.
  • It requires more memory as it uses the graphical user interface.
  • It also has a restriction to interact with the database directly.

How To Select A Java IDE

Deciding which IDE or editor suits our needs depends on various factors including the nature of the projects or applications being developed, the process used by the development team, individual-level and skills as a programmer as well as the role in the organization.

Personal preferences and standardization of tools also play an important part in the selection of IDE or editor.

The major advantage of using an IDE for development is when a compiler is integrated with IDE, we get the entire package at one place so that we can complete the code, compile, debug, and execute the program in the same software.


IDEs have an attractive user interface and come packaged with all the elements of software development that we can use to develop software applications.

In this tutorial, we will discuss some of the IDE used for Java development along with the Compilers/IDEs that we can use for Java programming. For developing server-side Java applications, we use three IDEs often i.e. IntelliJ IDEA, Eclipse, and NetBeans.

We will review these three IDEs along with a few other popular ones.

IntelliJ

IntelliJ IDEA is one of the professional Java IDE for developers who are looking for a robust, responsive, and ergonomic development environment for developing Java applications for web and mobile. With its advanced intelligence and out-of-the-box experience, IntelliJ IDE offers critical and comprehensive tools for developers as well as provides coding assistance to help you get more done.

IntelliJ is a capable and advanced IDE with built-in tools to help you stay productive and manage your projects from start to finish in a better and more ergonomic way than before. It supports web and mobile development for various languages such as – HTML5, JavaScript, Angular JS, React, Android, PhoneGap, and Node.js with a wide variety of plug-ins and integrated version controls.

IntelliJ IDEA tries to be an intelligent Integrated Development Environment (IDE). IntelliJ uses the techniques that make the automation of some tasks and suggests actions that may facilitate the developer’s work. packed with this, IntelliJ provides out-of-the-box integration with popular frameworks used by Java developers. This native integration drastically reduces the existence of bugs and provides great synergy between the different technologies used to construct your project.

IntelliJ the present

IntelliJ IDE offers critical and comprehensive tools for developers as well as provides coding assistance to help you get more done. IntelliJ is a capable and advanced IDE with built-in tools to help you stay productive and manage your projects from start to finish in a better and more ergonomic way than before. It supports web and mobile development for various languages such as – HTML5, JavaScript, Angular, React, Android, PhoneGap, and Node.js with a wide variety of plug-ins and integrated versions controls.

IntelliJ as a platform

In 2013 Android Studio dumped Eclipse for IntelliJ IDEA. Currently, Android Studio is based on IntelliJ Platform community edition.

pros

  • It offers many plugins which offer different using programming languages
  • Both design and development can be done with ease.
  • The shortcut commands are actually really useful when you are working on a very large codebase with multiple contributors
  • IntelliJ helps you with most code smart completion and redirection when you are working with frontend or backend (java) frameworks.
  • It has all the features one can wish for including the fast global search for files and classes, autocompletion, refactoring tools, and neat UI for the UT framework.
  • Simple setup for debugging
  • Clever UI design, including keyboard shortcuts and elegant code completion.

Cons

  • Slow Indexing when the project is big.
  • UI Designer produces java code which is dependent to Intellij’s libraries.
  • The support of non-JVM languages is regular or inexistent.
  • Slow startup time

Cost

IntelliJ comes in an ‘Ultimate’ edition for enterprise developers as well as an ‘Individual’ edition. Both of these come ready with advanced productivity and development features and powerful GUIs for building robust web applications. Eclipse IDE is also free and open-source with a rich library, vast community, and huge ecosystem of plug-ins and extensions.

Дополнительные сведения

Информацию о создании стандартных и произвольных проектов Java и работе с ними см. в разделе Создание проектов Java в документе Разработка приложений в IDE NetBeans.

Дополнительные сведения о разработке приложений Java в среде IDE, включая управление путем к классам, доступны в документе Разработка базовых приложений Java.

Для получения подробных инструкций о том, как скомпилировать и выполнить простое приложение «Hello World!» в используемой операционной системе, см. занятие Приложение «Hello World» в учебных курсах по Java.

Чтобы найти сведения, связанные с определенным типом разрабатываемых приложений, используйте карту обучения для этого типа приложений. Каждая учебная карта содержит ряд учебных курсов и руководств различных уровней сложности. Доступны следующие учебные карты:

Eclipse


Eclipse is an OpenSource IDE that can be used to develop software in any language, not just Java. Eclipse is a hugely flexible IDE. It is one of the most widely adopted ides for Java Development in the world. If we compare it to other IDE’s, it is very effortless to use. developing in Eclipse is easy with its intellisense. And moreover, it’s debugging tool is quite powerful. Eclipse has extensions and plugins for almost everything. Since its open-source, you can even develop your own extension.

Eclipse IDE the present

The Eclipse project has a simultaneous release every year at the end of June. In June 2017 the Eclipse 4.7 (Oxygen) version was released. At the present Eclipse IDE has a lot to offer, With features like – Gradle support, Git version control, XML editing, Apache Maven integration and Mylyn task list tool built-in within the Eclipse IDE, developers can always stay on top of updated libraries, and features to build Java-based applications as well as enjoy support for HTML5, Node.js, AJAX, CSS, PHP, Javascript, Typescript and more.

Stand-alone Eclipse

Several projects and companies have extended the Eclipse IDE or created stand-alone applications (Eclipse Rich Client Platform) on top of the Eclipse framework.  some of the include

  • MyEclipse IDE
  • Angular IDE
  • Zend Studio
  • Adobe ColdFusion IDE
  • Aptana
  • NodeEclipse
  • Phaser Editor
  • PHP development tools (PDT)
  • Sourcery CodeBench

pros

  • It is free! It runs on Linux, Mac, Solaris, and Windows.
  • A built-in incremental compiler which provides you with real-time error reporting
  • Endless plugins – Devstyle, SVN, Maven, etc
  • Server integration- Run Tomcat, JBoss inside the eclipse
  • Customization options to match your taste
  • Shortcuts editor, you can customize as per your need preference
  • you could program in most languages with Eclipse
  • Bugs are fixed relatively quickly
  • debugging tool is quite powerful
  • Auto-suggest, code highlighting, auto code generator are just a few amazing features
  • Rich Client Platform: You can easily build rich client applications with eclipse which are compatible with native applications.

Cons

  • It requires large amounts of system resources which sometimes leads to crash and loss of work.
  • there are many plugins for the same thing and becomes hard to choose one.
  • No touchscreen interface.

Database

Separate editor for cell values Ultimate

This release introduces some valuable tools for cases where you have a long value in a cell. Starting with this release, you can view and edit long values in a separate panel. The editor panel has a soft-wrap mode that can be toggled in the right-hand toolbar.

New UI for boolean values Ultimate

It is now easier to observe and edit boolean values, which are now shown as raw values instead of as checkboxes. You can type f, t, d, n, g, or c to enter the corresponding values of false, true, default, null, generated, and computed. If you type anything else, you’ll get a drop-down list with possible values.

DML preview in the data editor Ultimate

You can now preview a query with your changes in the data editor. To do so, click the DML button that becomes active if there are changes pending.

2.3 Установка IDEA

На официальной странице IntelliJ IDEA (https://www.jetbrains.com/idea/download/) вы можете выбрать понравившуюся вам версию Intellij IDEA. Надеюсь, вы уже определились с тем, какая вам больше по душе. Если не можете определиться, рекомендую Community Edition: просто и понятно.

Существуют версии IDEA под Windows, MacOSX, а также Linux. В этом нет ничего удивительного, т.к. разработчики очень любят две последние операционные системы. Когда вы поднаберетесь опыта, тоже будете поражаться тому, как просто управлять различными программами и сервисами через консоль/терминал.

Если у вас остались вопросы, возможно, вам поможет официальная инструкция по установке IntelliJIDEA. Вот ее упрощенный перевод на русский язык:

  • Вы занимаетесь разработкой на Java, Groovy, Scala и под Android? Вам подойдет бесплатная версия с открытым исходным кодом IntelliJ IDEA Community Edition.
  • Вам нужны разработки веб или энтерпрайз-приложений? Тогда возьмите пробную версию на 30 дней IntelliJ IDEA Ultimate с исключительным набором средств разработки и поддерживаемых фреймворков.
  • Для получения более подробной информации, посмотрите полное сравнение версий.
    • Если вы участвуете в разработке проекта с открытыми исходными кодами, покажите ваши коммиты и мы вышлем вам персональную лицензию бесплатно!
    • Если вы студент, попросите вашего преподавателя получить бесплатную лицензию для учебных заведений!
    • Если вы работаете на компанию, убедите вашего начальника приобрести коммерческую лицензию!
  1. Как я могу установить IntelliJ IDEA на моей операционной системе?
  • Windows: Запустите .exe файл и дальше вам все подскажет установщик.
  • OS X: Откройте .dmg файл и перетащите/скопируйте IntelliJ IDEA в папку /Программы.
  • Linux: Разархивируйте .tar.gz и запустите bin/idea.sh.
  • Простейший и наиболее эффективный способ быть услышанным — это сообщить о проблеме на нашем сайте.
  • Если у вас возникла проблема или просто идея, как сделать среду разработки удобнее, сообщите нам. Наша команда разработчиков очень быстро откликнется.
  • Другой вариант оставить отзыв или получить помощь от сообщества разработчиков — спросить на форуме. Велики шансы, что кто-то уже знает решение вашей проблемы.

Conclusion

Thank you for coming along on this long exploration of the best Java IDEs available for all programmers. However, to pick the best Java IDE for you, to get your creative and productive juices flowing, you should consider the following,

  1. Support of programming languages
  2. Customization
  3. Error Checking and Report
  4. Unit Testing
  5. Code auto-completion
  6. Decluttered environment
  7. Remote collaboration tool
  8. Flexibility and extensibility with plugins.

You can always find a Java IDE for you from this list, but feel free to check out other available IDEs to find what works for you.Until next time, Stay safe, Stay productive.

Жизненный цикл программы

Integrated Development Environment (IDE)

Компилятор

Исполнение программы

  1. В оперативной памяти компьютера запускается JVM. По сути это программа, которая служит для выполнения написанных нами Java-программ.
  2. С помощью начального загрузчика классов JVM загружает и инициализирует наш класс в памяти компьютера. В нашем примере это класс .
  3. Далее в нашем классе JVM ищет метод .
  4. Выполняется код метода . Если это необходимо для выполнения программы, производиться загрузка и инициализация других классов.
  5. После выполнения кода производится уборка мусора — очистка памяти и закрытие программы JVM.

Java

Java 15 support

Although the release of Java 15 will take place in September, IntelliJ IDEA 2020.2 is already prepared for it. Support for the Records feature has been updated and is now in its second preview. We’ve also added basic support for sealed classes. And, of course, IntelliJ IDEA provides full support for Text Blocks.

Related problems inlay hint

If you introduce errors by changing the signature of a class, method, or field that has external usages, the IDE will notify you with an inlay hint. Click on the related problems inlay hint, and the IDE will open the Find tool window with a list of all the related problems occurring in external files.

Ability to create multiple Structural Search and Replace inspections

The IDE allows you to find and, if necessary, replace blocks of code that match a specific pattern using Structural Search and Replace. With IntelliJ IDEA 2020.2, you can create multiple structural search templates as inspections. For each SSR inspection, you can specify the severity level, add descriptions, and enable or disable them separately.


Pinpointing causes of runtime exceptions

We’ve supplemented exception stack trace analysis with dataflow analysis. When you click on the stack trace, the IDE can take you to the exact place in your code where an exception appears, and it offers a suggestion that can help you find out why it happened.

Better autocompletion for Stream API methods

IntelliJ IDEA 2020.2 works even better with the Stream API. Instead of having to type and then type the right operation on the stream, you can start typing the stream method name within the collection itself, and IntelliJ IDEA will insert automatically. This works for any stream operation.

Scopes for Introduce Variable

With IntelliJ IDEA 2020.2, the Introduce Variable refactoring can selectively replace occurrences of a variable in an intermediate scope. You can now choose various options for replacement, rather than being limited to choosing only one or all occurrences. The editor highlights which occurrences will be replaced with a new variable as you hover over each of the choices.

1.2 Что такое JDK

JVM — это сокращенное название от Java Virtual Machine — Виртуальная Машина Java. Обычный процессор выполняет машинный код, а JVM выполняет байт-код. Поэтому JVM — это как бы виртуальный процессор/машина.

Программисты вообще часто называют компьютер/процессор машиной. ЭВМ, кстати, это тоже Электронно-Вычислительная Машина. Привыкайте: вы теперь тоже один из них.

JVM вещь хорошая, но одну JVM никто не использует. Голый процессор тоже никому не нужен. Обычно вместе с JVM идет еще набор стандартных библиотек: коллекции там всякие, списки и другие классы. В стандартной библиотеке, кстати, несколько тысяч классов.

JVM совместно со стандартными Java-библиотеками образует JRE — Java Runtime Environment — Среду Выполнения Java.

JRE достаточно для запуска многих Java-программ, но не для программистов. Java-компилятор, например, в JRE не входит. И где же его взять?

Для Java-программистов есть свой собственный набор — JDK — Java Development Kit — Набор Java-разработчика. В JDK входит JRE, а также Java-компилятор и другие программы полезные Java-разработчикам. Выглядит все это дело примерно так:

JDK содержит JRE + инструменты для Java-разработчиков.

JRE содержит JVM + набор стандартных Java-библиотек.

JVM — это виртуальная машина Java.


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