Oracle java and android

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ORACLE JAVA FOR MOBILE AND EMBEDDED DEVICES — DOWNLOADS

Java for Mobile Devices is a set of technologies that let developers deliver applications and services to all types of mobile handsets, ranging from price efficient feature-phones to the latest smartphones.

JAVA ME SDK 8.2

Oracle Java ME SDK 8.2 is now available to support Oracle Java ME Embedded 8.2 and 8.1 platforms and includes plugins for NetBeans.

REFERENCE IMPLEMENTATIONS

Mobile Information Device Profile (MIDP) 2.0

MIDP, combined with the Connected Limited Device Configuration (CLDC), is the Java runtime environment for today’s mobile information devices (MIDs) such as mobile phones and entry level PDAs.

Connected Limited Device Configuration (CLDC) 1.1

CLDC is a Java Community Process effort that has standardized a portable, minimum-footprint Java building block for small, resource-constrained devices. CLDC runs on top of Sun’s K Virtual Machine (KVM) that is provided as part of this release.

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Install Android Development Tools

Before You Begin

This 15-minute tutorial shows you how to install Android Studio, which includes the Android SDK, and create an Android Virtual Device (AVD) on which you install an Oracle JavaScript Extension Toolkit (Oracle JET) hybrid mobile application during a later tutorial. The time to complete doesnвЂ™t include processing time as a result of your activities.

Background

The Oracle JET command-line interface invokes the Android SDK that you install with Android Studio to build an Android application package (APK) file from the source files of your hybrid mobile application. This APK file is installed on an AVD to enable you to test the hybrid mobile application.

What Do You Need?

A computer that meets the system requirements to install Android Studio. See System requirements at https://developer.android.com/studio/

Install and Set Up Android Studio

Depending on the operating system of your computer, the Android Studio installation wizard prompts you with dialogs where you choose between standard or custom install types. Choose the options recommended by the Android Studio installation wizard as these options include the components that you require to create and install a hybrid mobile application on an AVD. They also include an Android emulator and an emulator accelerator appropriate for your computer, be that Windows, Mac, or Linux.

Go to the Download page for Android Studio on the Android Developer’s website at https://developer.android.com/studio/ and click DOWNLOAD ANDROID STUDIO.
Review and accept the terms and conditions in the Download Android Studio dialog that appears and click DOWNLOAD ANDROID STUDIO FOR PLATFORM where PLATFORM refers to the operating system of your machine, such as Windows, Mac, or Linux.
Go to the Install Android Studio guide at https://developer.android.com/studio/install and follow the instructions for your operating system to install and start Android Studio.
If you run Android Studio behind a firewall or secure network, an Android Studio First Run dialog appears which displays a button (Setup Proxy) that you click to enter the proxy server settings for your environment. This allows Android Studio to complete the download of the components for a standard install.
In the Welcome to Android Studio dialog, select Start a new Android Studio project, and then, in the Create New Project wizard, accept the default options to progress to the final screen in the wizard and click Finish.

This enables the Android Studio toolbar with the options that you need to create an AVD. It also downloads and configures the Gradle build tool that the Android SDK invokes to build the APK file when you complete the creation of your Oracle JET hybrid mobile application.

If you run Android Studio behind a firewall or secure network, a Proxy Settings dialog appears that enables you to configure proxy settings for the Gradle build tool that Android Studio downloads and configures. Provide the proxy settings for your environment to ensure that the Gradle build tool functions correctly.

Install an Android SDK Platform Package

In the Android Studio toolbar, click the SDK Manager icon () to open the Android SDK page in the Default Settings dialog.
In the SDK Platforms tab, select Android 8.0 (Oreo) with an API Level value of 26, and click Apply. Description of the illustration sdkmgrdialog.png
Click OK in the confirmation dialog that appears and accept the license agreement to proceed with the installation.
Once the installation completes, click Finish and then click OK to close the Default Settings dialog.

Create and Start an Android Virtual Device

In the Android Studio toolbar, click the AVD Manager icon ( ) and click Create Virtual Device in the Android Virtual Device Manager dialog that opens.
In the Phone category of the Choose a device definition page of the Virtual Device Configuration dialog, select Nexus 5X and click Next.
In the Recommended tab of the Select a system image page, click Download for the Oreo entry with an API Level of 26. Description of the illustration downloadoreo.png The SDK Quickfix Installation wizard opens.
Accept the license agreement to proceed with the download of the system image for Android 8.0 with API Level 26. Once the installation completes, click Finish and then click Next in the Select a system page.
In the Verify Configuration page, review and accept the default settings such as the AVD Name value of Nexus 5X API 26, then click Finish.
In the Android Virtual Device Manager dialog, click the Launch this AVD in the emulator icon () under the Actions column for the newly-created Nexus 5X API 26 AVD.

The Android emulator starts and loads the Nexus 5X API 26 AVD. A toolbar appears to the right of the AVD that provides UI controls to interact with the AVD.

Description of the illustration sdkmgrdialog.png

Install the Java SE Development Kit 8

Go to the Java SE Development Kit 8 Downloads page at http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html, accept the license agreement, and download the Java SE Development Kit installation file for your platform.
Follow the JDK installation instructions for your platform at https://docs.oracle.com/javase/8/docs/technotes/guides/install/toc.html.

Create Environment Variables

To function correctly, the Apache Cordova command-line interface that the Oracle JET command-line interface communicates with requires that you configure environment variables. These environment variables reference the installation location of the Android SDK that is installed by Android Studio and the Java SE Development Kit 8.

For Windows.
- Open the Environment Variables dialog from the System Properties dialog by navigating Control Panel >System and Security >System >Advanced System Settings >Environment Variables.
- Click New in the Environment Variables dialog and set the values of the variables to the location of the JDK and Android SDK locations, as shown in the following image. You can obtain the Android SDK location from the Android SDK page of the Default Settings dialog that you access in Android Studio by clicking Tools >SDK Manager. Description of the illustration envvar.png
For Mac and Linux-type systems, the settings depend upon your default shell. For example, on a Mac system using the Bash shell, add the following lines in

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Oracle Java

Java is the #1 programming language and development platform. It reduces costs, shortens development timeframes, drives innovation, and improves application services. With millions of developers running more than 51 billion Java Virtual Machines worldwide, Java continues to be the development platform of choice for enterprises and developers.

The next long-term support release of Java 17 is now available. Oracle continues to innovate on the Java platform at a regular six-month cadence, keeping Java vibrant and relevant for enterprises and developers throughout the world.

Discover, monitor, and manage your Java environment with this powerful new Oracle Cloud service.

451 Research expert insights on regulatory compliance in IT projects and how Oracle Java helps enterprises strengthen security and stability.

Assess the health of your Java environment

Get a personalized assessment of the health of your Java deployments by taking this short quiz. See your specific readiness mapped out with suggestions for improvement.

Continuous innovation from the leaders of Java

Java SE Subscription now includes Oracle GraalVM Enterprise

Now your Java SE Subscription includes high-performance runtime support with GraalVM Enterprise—at no additional cost.

Community stewardship

Oracle supports millions of members globally with one of the largest communities and ecosystems. By encouraging, funding, and amplifying community participation, the Java platform stays modern and vibrant.

Java’s contributions to development and digital transformation

IDC recently examined the history and future for Java and related technologies including GraalVM. It confirms that Java is the most widely used language in the industry today.

Addressing next-generation application development with Java

Java is more powerful and relevant today than ever before. Read the results of the VDC Research study on the leading business and technical trends in software development. The global survey determined that Java continues to be the #1 programming language.

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Не попадитесь в ловушку используя Oracle JDK 11

Привет, Хабр! Представляю вашему вниманию перевод статьи «Do not fall into Oracle’s Java 11 trap» автора Stephen Colebourne.

Java 11 была официально выпущена. Это мажорный релиз, имеющий долгосрочную поддержку (LTS — long-term support). Однако Oracle приготовила ловушку (намеренно или случайно).

Ловушка

В течение 23 лёт разработчики привыкли загружать JDK с сайта Oracle и использовать его бесплатно. Введите «JDK» в свою любимую поисковую систему, и верхняя ссылка будет вести на страницу загрузки Oracle Java SE (я намеренно не предоставляю ссылку). Но этот запрос и эта ссылка теперь являются ловушкой.

Oracle JDK, на который ссылаются почти все поисковые запросы, теперь является коммерческим, и не является бесплатным.

Ключевая часть обновлённого лицензионного соглашения заключается в следующем:

You may not: use the Programs for any data processing or any commercial, production, or internal business purposes other than developing, testing, prototyping, and demonstrating your Application;

Вы не можете использовать программы для любой обработки данных или для любых коммерческих, производственных или внутренних бизнес-целей, кроме разработки, тестирования, прототипирования и демонстрации вашего приложения;

Ловушка выглядит следующим образом:

Загрузите Oracle JDK (потому что это то, что вы всегда делали, и это то, куда с большой вероятностью выведет вас поисковая система).
Используйте его в продакшен среде (потому что вы не понимали и/или не знали, что лицензия изменена)
Получите неприятный телефонный звонок от команды по защите прав Oracle, требующей много денег.

Другими словами, Oracle может полагаться на инерцию разработчиков Java, чтобы заставить их загружать неправильную (коммерческую) версию Java. Если вы не прочтете текст лицензионного соглашения или предупреждения очень осторожно, вы, возможно, даже не поймете, что Oracle JDK теперь является коммерческим, и поэтому вам, возможно, придётся заплатить Oracle за Java.

Является ли эта ловушка злонамеренным поведением со стороны Oracle? У читателей будет свое мнение. Стоит иметь в виду, что Oracle вкладывает огромные суммы в разработку Java, поэтому разумно иметь коммерческий план для тех, кто этого хочет. Однако, Oracle также они предоставляет бесплатную альтернативу.

Решение

Используйте сборку OpenJDK.

Помимо своего коммерческого JDK, Oracle создает сборку OpenJDK. Это бесплатная сборка с лицензией GPL (исключением является Classpath, безопасно для коммерческого использования). Скачать можно здесь.

В данный момент, OpenJDK сборка от Oracle является единственно доступной. Однако, в скором времени будет доступно больше, например, от AdoptOpenJDK (вероятно, на этой неделе). А также сборки OpenJDK, от других, отличных от Oracle, участников комьюнити, которые будут использоваться для долгосрочной поддержки Java 11. (прим. переводчика: про разницу между OpenJDK и AdoptOpenJDK можно прочитать этот ответ на SO)

Резюме

НЕ загружайте и не используйте Oracle JDK, если вы не намерены платить за него.

С настоящего момента и впредь, для использования Java 11 загружайте и используйте сборку OpenJDK.

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Oracle java and android