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Space integration

Space job statuses in the Git log

It is easy to track a job’s progress by just looking at the commits list, as we’ve
introduced icons for Space job statuses in the Log tab of the Git tool window. If
you click on an icon, the IDE will open a popup with the automation info for that job.

If you don’t need the status information, click the eye icon above the log and
select Show Columns | Space Automation.

Mention teammates

It is now more convenient to communicate with teammates in Space code reviews, as you
can mention them with @ followed by the colleague’s name. This minor but helpful feature
works in the timeline and in code comments.

Debugger

Dataflow analysis assistance

IntelliJ IDEA v2020.1 adds dataflow analysis assistance to the debugger, which predicts and shows you possible exceptions and always true/always false conditions based on the current state of the program execution.

When you debug Java code and reach a breakpoint, the IDE runs the dataflow analysis based on the current state of the program and shows you what will happen next, before the code execution reaches that point:

You can read all the details about this new feature in Integrating Java Dataflow Analysis and the Debugger.

Pin to top

Another small but helpful improvement is the ability to pin any of an object’s fields to the top of its fields list. This can come in handy when the object has so many fields that it becomes difficult to find the ones you need to investigate:

We’ve added another minor debugger improvement that allows you to connect to a debugging session from a remote machine through IPv6.

Collaboration and teamwork

Collaborative development (Code With Me)

IntelliJ IDEA provides a service for collaborative development and pair programming –
Code With Me.
It lets you share the project currently open in your IDE with others so you can work on
it together in real-time. Code With Me also features video and voice calls from the IDE,
allowing you to organize both 1-on-1 meetings and group sessions with dozens of participants.

You can learn all about Code With Me in this series of
blog posts.

Space integration

IntelliJ IDEA offers integration with JetBrains
Space,
an all-in-one solution for software projects and teams. Connect IntelliJ IDEA to your
Space organization to view and clone project repositories, review your teammates’ code,
and write Space Automation scripts.

Первая программа в IntelliJ IDEA

Последнее обновление: 23.09.2021

В прошлой теме мы рассмотрели, как создавать первую программу с последующим ее запуском в командной строке. Однако в реальности,
как правило, крупные программы разрабатываются не при помощи простого текстового редактора, а с использованием таких средств как IDE или интегрированные среды
разработки, которые упрощают и ускоряют написание кода и создание приложений. На данный момент одной из самых популярных сред разработки для Java является
IntelliJ IDEA от компании JetBrains. Рассмотрим, как использовать данную среду.

Конечно, Community-версия не имеет ряда многих возможностей, которые доступны в Ultimate-версии (в частности, в Community недоступны опции для
веб-приложений на Java). Но Community-версия тоже довольно функциональна и тоже позволяет делать довольно много, в том числе приложения на JavaFX и Android.

После установки запустим IntelliJ IDEA и создадим первый проект. Для этого на стартовом экране выберем New Project:

Далее откроется окно создания проекта. В левой части в качестве типа проекта выберем Java.

Кроме того, в поле Project SDK можно указать путь к Java SDK, который будет использоваться
в проекте. Как правило, это поле по умолчанию уже содержит путь к SDK, который установлен на локальном компьютере. Если это поле пусто, то его надо установить.

После этого нажмем на кнопку Next. Далее будет предложено отметить шаблон проекта. По умолчанию тут один шаблон проекта — Command Line App, который предполагает запуск приложения как
консольного.

И в конце откроется окно, где надо будет ввести название проекта и пакета, а также указать его расположение на жестком диске. Здесь можно ввести
любые данные. Ну в данном случае проект будет называться HelloApp, а базовый пакет «com.metanit».

И после этого для создания проекта нажмем на кнопку Finish. После этого среда создаст и откроет проект.

В левой части мы можем увидеть структуру проекта. Все файлы с исходным кодом помещаются в папку src.
По умолчанию она содержит каталог, который называется по имени пакета и который имеет один файл Main.java.

В центральной части программы открыт исходный код программы в виде класса Main. Изменим его следующим образом:

package com.metanit;

public class Main {

    public static void main(String[] args) {

        System.out.println("Hello Java!");
    }
}

С помощью зеленой стрелки на панели инструментов или через меню Run -> Run запустим проект.

И внизу IntelliJ IDEA отобразится окно вывода, где мы можем увидеть результат работы нашей программы.

НазадВперед

Free IDE for high-efficiency development

IntelliJ IDEA is a free Integrated Development Environment (IDE) for Java programming that’s great for developers who want to maximize their productivity. It is available under an Apache 2.0 license, which allows users to develop royalty-free and non-commercial products, plugins, and IDEs. The program is developed by JetBrains, a software development company.

This IDE has an open-source version called IntelliJ IDEA Community Edition, and a paid version called IntelliJ IDEA Ultimate. The two versions have distinct differences, but the Community Edition platform is quite similar to Ultimate. Plus, it has all the essential features that any developer would need. 

Great for code completion

IntelliJ IDEA has a lot of features, but its most popular key feature is its smart code completion capability. This basically means that the program can suggest classes, methods, fields, and keywords that are expected in the current code you’re trying to create. Aside from that, the IDE also predicts what you need and allows you to automate repetitive development tasks. It can help you quickly fill a field, access a tool window, set toggles, easily search through a list of numerous elements, and a whole lot more. 

The code completion feature has two types of suggestion lists: Basic completion and smart type-matching completion. The basic code completion appears when you press Ctrl+Space, then it suggests a list of possible names when applied to a part of a field, variable declaration, or parameter. Pressing Ctrl+Space twice will show inaccessible members, classes, and static fields and methods. Meanwhile, pressing the command three times will expand the suggestion list of the basic code completion to all classes in the project.

Smart type-matching completion and programming languages

Now, while the basic completion can practically give you everything, the smart type-matching completion only gives you suggestions that are relevant to the current context. By default, the IDE already displays the completion pop-up automatically while you type. So, if smart completion is disabled, the shortcut command is Ctrl+Shift+Space to turn it on. What’s great about the smart completion feature is that it lets you complete static method calls, collections, lists, and arrays. This can help you speed up your coding process, making your work more efficient.

IntelliJ IDEA supports numerous programming languages, including Java, Markdown, Groovy, XSL, Kotlin, HTML, XML, JSON, YAML, Python, and a whole lot more. However, with the Ultimate version, you can use JavaScript, CSS, TypeScript, SQL, SCSS, Sass, Less, Stylus, ActionScript, and CoffeeScript—all without needing plugins. A small downside, however—albeit the IDE supporting numerous languages—is that it has a lot of plugins installed, which can make the software freeze or crash if you have low RAM.

Powerful IDE

To sum, IntelliJ IDEA is a very powerful IDE that caters to a lot of programmers and programming languages. Its platform and features are designed to help you code your programs faster and more efficiently. While it may freeze if you have low RAM, that’s a minor issue compared to its capabilities. The smart code completion is definitely a crowd-pleaser, as it doesn’t just give you random suggestions.

User Experience

Quick access to Eclipse projects

IntelliJ IDEA can detect Eclipse projects stored locally on your machine, and it
allows you to open them from the Welcome screen. If it is your first IDE launch,
select the Open existing Eclipse projects option. If not, automatically
detected Eclipse projects will appear in the dedicated node among the recent projects.

Advanced Settings

If you need to configure some use-case-specific options in IntelliJ IDEA, you can do
it in the new Advanced Settings node in Preferences/Settings. For example,
you can add a left margin in Distraction-free mode or set the caret to move down
after you use the Comment with Line Comment action.

Organize tool windows by drag and drop

It is now easier to drag and drop a tool window to the desired place within the
main IDE window or in a separate window. You can drag it by clicking and holding
the tool window name bar and drop it in any highlighted place.

Automatic cache and logs cleanup

IntelliJ IDEA automatically cleans up any cache and log directories that were last
updated more than 180 days ago. This process doesn’t affect system settings and
plugin directories. You can initiate the process manually via
Help | Delete Leftover IDE Directories.

Missing plugin notifications

If your project uses a framework that works in IntelliJ IDEA via a plugin, the IDE
will notify you and offer to enable it directly from this notification.

New navigation option in Preferences/Settings

We’ve simplified navigation in Preferences/Settings by adding arrows to the
top right-hand corner of the window. They allow you to quickly jump back and forth
between the sections you’ve opened.

Update notifications from the Toolbox App

When any product updates appear in the Toolbox App, your IDE will inform you. If
there is a new version available for download, you’ll be able to upgrade to it right
from IntelliJ IDEA. Toolbox App 1.20.8804 or later is required to use this feature.

Quick access to Power Save mode

IntelliJ IDEA has a Power Save mode to help you extend the battery life on your laptop.
To make this mode easier to access, we’ve made it possible to manage it from the
status bar. Right-click on the status bar and select Power Save Mode – you’ll
see a new icon appear in the bottom right corner of the IDE. Click on this icon
whenever you want to turn the mode on or off.

Accessibility updates

IntelliJ IDEA 2021.2 includes a number of helpful updates for coding with the enabled
screen reader
mode on macOS. We’ve voiced available suggestions for code completion,
the content of the selected combo box and combo box lists, and the results of your
queries in Search Everywhere.

Other

Localized UI in Chinese, Japanese, and Korean

Starting with this version, you can enjoy the fully localized IntelliJ IDEA UI in
Chinese,
Korean, and
Japanese.
Localization is available as a non-bundled language pack plugin, which can be
easily installed in your IDE.
More than 1.5 million users have started using the partially localized EAP version of our
language packs. Now you can enjoy the full localization experience!

Unbundled plugins

After analyzing how often you use several plugins, we decided to unbundle some of them,
including Resource Bundle Editor, Drools, JSP Debugger Support,
CoffeeScript, Spring Web Flow, Spring OSGI, Arquillian,
AspectJ, Guice, Helidon, Emma, and EJB. If you still
need any of these plugins, please install them manually from JetBrains Marketplace.

Kotlin

Automatic ML-completion

Starting from v2021.2, Kotlin code completion works based on the machine learning
mechanism by default. Code suggestions are prioritized more carefully as the IDE
relies on the choices of thousands of real users in similar situations. You can
configure ML-assisted completion in Preferences/Settings | Editor | Code Completion.

Run tests before code analysis finishes

Previously you had to wait for code analysis to finish before you could start running
your tests. In the current version, you can launch tests immediately after opening the
file by clicking the Run test icon in the gutter.

Debugger updates

We’ve introduced some useful improvements and updates to our coroutine agent in the
debugger. The coroutines agent is now available via the Coroutines tab in the
Debug tool window. It works for Java run configurations with a dependency on
kotlinx.coroutines, and Spring and Maven run configurations.

We’ve also fixed an issue when local variables were not used after passing a suspension
point and disappeared in the Variables view of the Debugger tool window.

More room for action during indexing

Don’t waste another minute! While the IDE is indexing a project you can run and debug
your application. The buttons associated with Run/Debug Configuration are active
during indexing.

Kotlin support for WSL 2 and Run Targets

In IntelliJ IDEA 2021.1, we’ve introduced

support and the
Run Targets
feature. In v.2021.2, you can use these features for Kotlin.

Inspection to simplify call chain on collection type

In this release, we’ve added a useful inspection that helps you simplify the syntax and
combine several calls into one when calling methods in a chain inside a collection.

User experience

New Welcome screen

The IntelliJ IDEA welcome screen has been redesigned. The Initial wizard has been replaced
with a quick-access screen containing four tabs: Projects for managing your
projects,
Customize for setting up the IDE interface, Plugins for plugin
installation, and
Learn IntelliJ IDEA for access to help and learning resources.

Learn IntelliJ IDEA

Open the Learn IntelliJ IDEA tab right from the Welcome screen. Here you can find
interactive
lessons and useful Help links. Click Start Learning to study various IDE features
step by
step in a real environment. Follow the instructions in the Learn view to test your
new
skills on actual coding samples.

IDE theme synced with OS settings

IntelliJ IDEA can now synchronize its theme with your OS theme. To enable this
feature, go to Settings / Preferences | Appearance & Behavior | Appearance and tick the
Sync with OS checkbox. Click the gear icon next to Sync with OS to select your
preferred theme.

Reader mode

Read-only files and files from external libraries are now opened by default in Reader
mode. In this mode, comments look like formatted text and font ligatures are enabled to
help make the
code more readable to users. You can customize Reader mode settings in Settings /
Preferences | Editor | Reader Mode.

LightEdit improvements

In IntelliJ IDEA 2020.3 we’ve improved the UX for LightEdit mode. To open files in
LightEdit mode from the command line, you now type () followed by the name
of the file
you want to open, or omit the filename to reopen your previous session. A new status bar in the
LightEdit window provides access to the full set of IDE features. If you want to learn more
about LightEdit mode updates, read this blog
post.

Better spelling and grammar checkers

Now when you press Alt+Enter, the IDE invokes suggestions to correct your
grammar
or spelling. What’s more, we started using a new version of the LanguageTool grammar checking
engine, which improves text reviews in English and adds support for 10+ more languages.

Search Everywhere updates

We’ve added a new Git tab to the Search Everywhere dialog. You
can now find commit
hashes and messages, tags, and branches in the Search Everywhere dialog. You can also perform
simple mathematical calculations in the search field.

Preview tab

You can now open a file in a preview tab with a single click. When you open a file
in a preview tab, its name is displayed in italic. If you start editing this file, it will cease
to be a preview and will become an ordinary file. If you single-click another file to open it in
preview mode, it will appear in the same tab, replacing the previously opened one. To enable
this feature, click the gear icon in the Project view and select Enable Preview
Tab.

Linux emoji picker

In v2020.3, we’ve added an emoji picker for Linux . To open the emoji picker,
press Ctrl+Alt+; . You can filter emojis by category, change their skin tone, and
search for
emoji by name. The emoji picker fully supports keyboard navigation.

Kubernetes

Support for alias in Helm chart dependencies
Ultimate

In IntelliJ IDEA 2021.2, you can use the alias field that belongs to the
dependencies section in Chart.yaml (api v2) or in requirements.yaml
(api v1). This field states an alternative name of the current dependency. You may need
to use alias if an existing dependency is used several times and you want to
distinguish between these usages. In addition, if the chart name uses symbols not
applicable in GoTemplate identifiers, alias can also help you fix it.

Custom namespaces
Ultimate

Sometimes when you work with a Kubernetes cluster, you will be granted access to
particular namespaces, but you won’t receive the list of all of the cluster namespaces.
In this case, you can now specify the list of available namespaces in
Preferences / Settings | Tools | Kubernetes.

Database tools

DDL data source
Ultimate

It is now possible to generate a DDL data source based on a real one. The DDL files
will be created on the disk and the new data source will be based on them. That way
you’ll always be able to regenerate these files and refresh the DDL data source.
Step-by-step instructions on how to apply this feature are available in our
blog post.

Managing the popping up of Services tool window
Ultimate

When a query returns no data, there’s no need for the Services tool window to
appear if it was hidden already. Now you can define which operations make the
Services tool window appear on your own in
Preferences / Settings | Tools | Database | General.

Frameworks & Technologies

Microservices diagram
Ultimate

IntelliJ IDEA lets you display microservice interactions in a diagram, which you can
build by clicking the respective icon in the Endpoints tools window. This new diagram
offers the option to track which client calls a particular service and navigate to this
call in your code. To do so, just click on an arrow that connects the blocks in the diagram.

The diagram is available in Java and Kotlin projects if you use Spring, Micronaut,
Quarkus, or Helidon.

Automatic migration from Java EE to Jakarta EE
Ultimate

The new Migrate… refactoring helps quickly and painlessly migrate a project
or module from Java EE to Jakarta EE. After you initiate it, the Refactoring Preview
shows all the found usages of Java EE imports. You can then check through and finalize
the process.

Automatic download of shared indexes for new Spring Boot projects
Ultimate

When you create a new Spring Initializer project, the IDE will download shared
indexes automatically, reducing indexing time and speeding up IDE startup. The checkbox
that turns this feature on is located on the second screen of the New Project wizard.
Please note it won’t work if you have disabled Shared Indexes in
Settings/Preferences | Shared Indexes.

Support for JPA Entity Graph
Ultimate

In this version, we’ve introduced support for an
Entity Graph
which you can define with the annotation. Your IDE allows
you to specify a unique name and the attributes () for
this annotation using code completion, error detection, and navigation to the related
entity by clicking on an attribute.

Support for cache annotations in Micronaut and Quarkus
Ultimate

Cache annotations for
Micronaut
and
Quarkus
are now supported in the IDE. We’ve added gutter navigation between cache name usages,
as well as the ability to use Find usages and the Rename refactoring for
cache identifiers.

Better microservice navigation support in JavaScript and TypeScript
Ultimate

URL navigation in JavaScript and TypeScript has been significantly improved. For
client-side code (for Angular or Axios), URL references have been added for the
$http
service and
HttpClient
request method calls, and URL completion works based on available server-side frameworks
and OpenAPI specifications. For server-side, Express users can see Route handlers in the
Endpoints tool window and search for Express route declarations via
Navigate | URL Mapping.

gRPC endpoints displayed in the Endpoints tool window
Ultimate

In this version, we’ve added support for yet another framework – gRPC. We are planning
to introduce more features for working with it. For now, it is possible to see the gRPC
endpoints in the Endpoints tool window. Stay tuned for more updates!

Ktor integration
Ultimate

Ktor,
a web application framework for creating connected systems, is bundled with IntelliJ
IDEA Ultimate. Right from the welcome screen, you can create a new Ktor project for
developing server-side or client-side applications and configure the basic project
settings and various features supported by Ktor.

Key updates

Project-wide analysis for Java projects
Ultimate

In this release, we’re introducing a new feature for tracking errors throughout
the whole project before compilation – project-wide analysis. When you click the
dedicated icon in the Problems tool window, you enable a check that is
performed on every code change. When the process is over, the IDE displays all
the found errors, including those that are detected only by scanning the whole
project.

The feature works with small and medium-size projects.

Actions on save

We’ve added a number of actions that will be initiated by saving the project, including
reformatting code and optimizing imports. All of them are conveniently gathered together
in Preferences / Settings | Tools | Actions on Save. It is easy to configure them
from there by ticking the necessary checkboxes. If you’d like to adjust the settings for
any action more precisely, simply hover over an action and click the configuration link.

User Experience

Quick access to Eclipse projects

IntelliJ IDEA can detect Eclipse projects stored locally on your machine, and it
allows you to open them from the Welcome screen. If it is your first IDE launch,
select the Open existing Eclipse projects option. If not, automatically
detected Eclipse projects will appear in the dedicated node among the recent projects.

Advanced Settings

If you need to configure some use-case-specific options in IntelliJ IDEA, you can do
it in the new Advanced Settings node in Preferences/Settings. For example,
you can add a left margin in Distraction-free mode or set the caret to move down
after you use the Comment with Line Comment action.

Organize tool windows by drag and drop

It is now easier to drag and drop a tool window to the desired place within the
main IDE window or in a separate window. You can drag it by clicking and holding
the tool window name bar and drop it in any highlighted place.

Automatic cache and logs cleanup

IntelliJ IDEA automatically cleans up any cache and log directories that were last
updated more than 180 days ago. This process doesn’t affect system settings and
plugin directories. You can initiate the process manually via
Help | Delete Leftover IDE Directories.

Missing plugin notifications

If your project uses a framework that works in IntelliJ IDEA via a plugin, the IDE
will notify you and offer to enable it directly from this notification.

New navigation option in Preferences/Settings

We’ve simplified navigation in Preferences/Settings by adding arrows to the
top right-hand corner of the window. They allow you to quickly jump back and forth
between the sections you’ve opened.

Update notifications from the Toolbox App

When any product updates appear in the Toolbox App, your IDE will inform you. If
there is a new version available for download, you’ll be able to upgrade to it right
from IntelliJ IDEA. Toolbox App 1.20.8804 or later is required to use this feature.

Quick access to Power Save mode

IntelliJ IDEA has a Power Save mode to help you extend the battery life on your laptop.
To make this mode easier to access, we’ve made it possible to manage it from the
status bar. Right-click on the status bar and select Power Save Mode – you’ll
see a new icon appear in the bottom right corner of the IDE. Click on this icon
whenever you want to turn the mode on or off.

Accessibility updates

IntelliJ IDEA 2021.2 includes a number of helpful updates for coding with the enabled
screen reader mode on macOS. We’ve voiced available suggestions for code completion,
the content of the selected combo box and combo box lists, and the results of your
queries in Search Everywhere.

1.3 Самостоятельная установка

1.3.1 Автономная установка в Windows

Установите IntelliJ IDEA вручную, чтобы управлять расположением каждого экземпляра и всех файлов конфигурации. Например, если у вас есть политика, для которой требуется определенное место установки.

  1. Загрузите установщик .exe。

  2. Запустите установщик и следуйте инструкциям мастера.

    На шаге «** Параметры установки» ** вы можете настроить следующее:

    • Создавайте ярлыки на рабочем столе для программ запуска, связанных с вашей операционной системой
    • Добавьте каталог с программой запуска командной строки IntelliJ IDEA вПеременная окружения
    • Добавить в контекстное меню системы пункт «** Открыть папку как проект» ** (при щелчке правой кнопкой мыши по папке)
    • Свяжите определенные расширения файлов с IntelliJ IDEA, чтобы дважды щелкнуть их, чтобы открыть их

По умолчанию IntelliJ IDEA входит в состав 64-разрядной версии среды выполнения Java. Если вы используете 32-битную версию Windows, пожалуйста,。

Когда вы запускаете IntelliJ IDEA в первый раз или обновляете IntelliJ IDEA с более ранней версии, вам потребуются некоторые шаги для завершения установки, настройки экземпляра и начала использования IDE.

Для получения дополнительной информации см.Запустите IntelliJ IDEA в первый раз。

1.3.2 Независимая установка Mac OSX

  1. Скачать образ диска .dmg。
  2. Смонтируйте образ иIntelliJ IDEAПеретащите приложение в папку «Приложения».

Когда вы запускаете IntelliJ IDEA в первый раз или обновляете IntelliJ IDEA с более ранней версии, вам потребуются некоторые шаги для завершения установки, настройки экземпляра и начала использования IDE.

Для получения дополнительной информации см.Запустите IntelliJ IDEA в первый раз。

Java

Inspection for tracking unsafe strings

We’ve introduced an inspection that helps you find such hazards as SQL injection and XSS flaws, sensitive data leaks, and insecure deserialization. It also warns you against passing insecure data to secure methods.

For this inspection to work, you should annotate strings as @Untainted ( “safe”) or @Tainted (“unsafe”). These annotations will be valid when you add the org.checkerframework.checker.tainting.qual dependency.

Once you’ve annotated the necessary strings, IntelliJ IDEA will identify the places in your code where a @Tainted or unknown string is passed to a method with an @Untainted parameter and show you a warning. You can then improve your code to resolve the problem or use a quick-fix to mark the string as safe.

The following GIF demonstrates what would happen if you used a string that contained an SQL injection:

You can find the inspection description under Preferences/ Settings | Editor | Inspections – Non-safe string is passed to asafe method.

System requirements

Requirement Minimum Recommended
RAM 2 GB of free RAM 8 GB of total system RAM
CPU Any modern CPU Multi-core CPU. IntelliJ IDEA supports multithreading for different operations and processes making it faster the more CPU cores it can use.
Disk space 2.5 GB and another 1 GB for caches SSD drive with at least 5 GB of free space
Monitor resolution 1024×768 1920×1080
Operating system

Officially released 64-bit versions of the following:

  • Microsoft Windows 8 or later

  • macOS 10.13 or later

  • Any Linux distribution that supports Gnome, KDE, or Unity DE.

Pre-release versions are not supported.

Latest 64-bit version of Windows, macOS, or Linux (for example, Debian, Ubuntu, or RHEL)
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