公開日:2023/07/10 / 最終更新日:2023/07/10

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How to Download JDK 11

If you are a Java developer or a Java enthusiast, you might be interested in downloading the latest version of Java Development Kit (JDK), which is JDK 11. In this article, we will explain what is JDK 11, what are its features and benefits, and how to download it for different operating systems. We will also show you how to install and run JDK 11 on your machine.

What is JDK 11?

JDK 11 is the latest release of the Java SE Platform and the first long-term support (LTS) release for the Java SE platform since Java SE 8. It was released on September 25, 2018 and will receive updates until at least September 2026. It is a development environment for building applications using the Java programming language. It includes tools useful for developing and testing programs written in Java and running on the Java platform.

Features of JDK 11

JDK 11 introduces many new features and enhancements that improve the performance, security, and productivity of Java developers. Some of the notable features are:

• A new HTTP client API that supports HTTP/2 and WebSocket protocols.
• A new local-variable syntax for lambda parameters that allows the use of var instead of explicit types.
• A new launch single-file source-code programs feature that allows the execution of a single-file program without compilation.
• A new dynamic class-file constants feature that reduces the cost and disruption of creating new forms of materializable class-file constants.
• A new low-overhead heap profiling feature that provides information about Java object heap allocations.
• A new Unicode 10 support that adds support for new scripts, characters, and emoji.
• A new Z Garbage Collector (ZGC) that provides low-latency garbage collection with a scalable heap.
• A new Epsilon garbage collector that handles memory allocation without implementing any actual memory reclamation mechanism.
• A new ChaCha20 and Poly1305 cryptographic algorithms that provide encryption and authentication for Internet protocols.
• A new key agreement algorithm that uses Curve25519 and Curve448 as described in RFC 7748.

Benefits of JDK 11

JDK 11 offers many benefits for Java developers and users, such as:

• It provides faster and more secure applications with improved performance and reduced memory footprint.
• It supports modern web standards and protocols with enhanced networking capabilities.
• It simplifies the development process with new syntax and features that reduce boilerplate code and improve readability.
• It enables innovation and experimentation with new APIs and tools that allow the creation of new forms of applications.
• It offers long-term stability and compatibility with a six-year support cycle and backward compatibility with previous versions.

How to Download JDK 11 for Different Operating Systems

JDK 11 binaries are free to use in production and free to redistribute, at no cost, under the Oracle No-Fee Terms and Conditions. You can download them from the Oracle website or from other sources such as OpenJDK or GraalVM. Here are the steps to download JDK 11 for different operating systems:

How to Download JDK 11 for Linux

You can download JDK 11 for Linux from the Oracle website or from the OpenJDK website. You can choose between Linux ARM 64 Compressed Archive or Linux x64 Compressed Archive depending on your system architecture. Here are the steps to download JDK 11 for Linux ARM 64 and Linux x64:

How to Download JDK 11 for Linux ARM 64

1. Go to the Oracle website and click on the JDK Download button.
2. Scroll down to the Java SE Development Kit 11.0.13 section and click on the Accept License Agreement radio button.
3. Click on the Linux ARM 64 Compressed Archive link and save the file to your desired location.
4. The file name should be something like jdk-11.0.13_linux-aarch64_bin.tar.gz.

How to Download JDK 11 for Linux x64

1. Go to the Oracle website and click on the JDK Download button.
2. Scroll down to the Java SE Development Kit 11.0.13 section and click on the Accept License Agreement radio button.
3. Click on the Linux x64 Compressed Archive link and save the file to your desired location.
4. The file name should be something like jdk-11.0.13_linux-x64_bin.tar.gz.

How to Download JDK 11 for macOS

You can download JDK 11 for macOS from the Oracle website or from the OpenJDK website. You can choose between macOS ARM 64 Installer or macOS x64 Installer depending on your system architecture. Here are the steps to download JDK 11 for macOS ARM 64 and macOS x64:

How to Download JDK 11 for macOS ARM 64

1. Go to the Oracle website and click on the JDK Download button.
2. Scroll down to the Java SE Development Kit 11.0.13 section and click on the Accept License Agreement radio button.
3. Click on the macOS ARM 64 Installer link and save the file to your desired location.
4. The file name should be something like jdk-11.0.13_osx-aarch64_bin.dmg.

How to Download JDK 11 for macOS x64

1. Go to the Oracle website and click on the JDK Download button.
2. Scroll down to the Java SE Development Kit 11.0.13 section and click on the Accept License Agreement radio button.
3. Click on the macOS x64 Installer link and save the file to your desired location.
4. The file name should be something like jdk-11.0.13_osx-x64_bin.dmg.

How to Download JDK 11 for Windows

You can download JDK 11 for Windows from the Oracle website or from the OpenJDK website. You can choose between Windows x64 Installer or Windows x64 ZIP Archive depending on your preference. Here are the steps to download JDK 11 for Windows x64:

How to Download JDK 11 for Windows x64

1. Go to the Oracle website and click on the JDK Download button.
2. Scroll down to the Java SE Development Kit 11.0.13 section and click on the Accept License Agreement radio button.
3. Click on the Windows x64 Installer link and save the file to your desired location.
4. The file name should be something like jdk-11.0.13_windows-x64_bin.exe.

How to Install and Run JDK 11

After downloading JDK 11, you need to install it on your machine and set up some environment variables to run it properly. Here are the steps to install and run JDK 11 on different operating systems:

How to Install JDK 11 on Linux

1. Navigate to the directory where you downloaded the compressed archive file (e.g., jdk-11.0.13_linux-aarch64_bin.tar.gz or jdk-11.0.13_linux-x64_bin.tar.gz).
2. Extract the contents of the file using a command like tar -xvf jdk-11.0.13_linux-aarch64_bin.tar.gz or tar -xvf jdk-11.0.13_linux-x64_bin.tar.gz.
3. This will create a directory named jdk-11.0.13 in the same directory where you downloaded the file.
4. Move the extracted directory to a location of your choice, such as /usr/local/java. You can use a command like sudo mv jdk-11.0.13 /usr/local/java.
5. Set the JAVA_HOME environment variable to point to the JDK installation directory. You can use a command like export JAVA_HOME=/usr/local/java/jdk-11.0.13.
6. Add the JDK bin directory to the PATH environment variable. You can use a command like export PATH=$PATH:$JAVA_HOME/bin.
7. Verify that JDK 11 is installed correctly by running the command java -version. You should see something like this:

java version "11.0.13" 2021-10-19 LTS Java(TM) SE Runtime Environment 18.9 (build 11.0.13+8-LTS-272) Java HotSpot(TM) 64-Bit Server VM 18.9 (build 11.0.13+8-LTS-272, mixed mode) 

How to Install JDK 11 on macOS

1. Navigate to the directory where you downloaded the installer file (e.g., jdk-11.0.13_osx-aarch64_bin.dmg or jdk-11.0.13_osx-x64_bin.dmg).
2. Double-click on the installer file and follow the instructions on the screen.
3. The installer will create a directory named jdk-11.0.13.jdk in the /Library/Java/JavaVirtualMachines directory.
4. Set the JAVA_HOME environment variable to point to the JDK installation directory. You can use a command like export JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk-11.0.13.jdk/Contents/Home.
5. Add the JDK bin directory to the PATH environment variable. You can use a command like export PATH=$PATH:$JAVA_HOME/bin.
6. Verify that JDK 11 is installed correctly by running the command java -version. You should see something like this:

java version "11.0.13" 2021-10-19 LTS Java(TM) SE Runtime Environment 18.9 (build 11.0.13+8-LTS-272) Java HotSpot(TM) 64-Bit Server VM 18.9 (build 11.0.13+8-LTS-272, mixed mode) 

How to Install JDK 11 on Windows

1. Navigate to the directory where you downloaded the installer file (e.g., jdk-11.0.13_windows-x64_bin.exe).
2. Double-click on the installer file and follow the instructions on the screen.
3. The installer will create a directory named jdk-11.0.13 in the C:\Program Files\Java directory.
4. Set the JAVA_HOME environment variable to point to the JDK installation directory. You can use a command like set JAVA_HOME=C:\Program Files\Java\jdk-11.0.13.
5. Add the JDK bin directory to the PATH environment variable. You can use a command like set PATH=%PATH%;%JAVA_HOME%\bin.
6. Verify that JDK 11 is installed correctly by running the command java -version in a command prompt window. You should see something like this:

java version "11.0.13" 2021-10-19 LTS Java(TM) SE Runtime Environment 18.9 (build 11.0.13+8-LTS-272) Java HotSpot(TM) 64-Bit Server VM 18.9 (build 11.0.13+8-LTS-272, mixed mode) 

Conclusion

In this article, we have learned what is JDK 11, what are its features and benefits, and how to download it for different operating systems. We have also learned how to install and run JDK 11 on our machines and verify that it is working correctly.

JDK 11 is a powerful and versatile development environment for building applications using the Java programming language. It offers many new features and enhancements that improve the performance, security, and productivity of Java developers and users.

If you want to learn more about JDK 11, you can visit the official website or read the documentation and tutorials available online.

Frequently Asked Questions

Here are some common questions and answers related to JDK 11:

Q: What is the difference between JDK and JRE?</h3 A: JDK stands for Java Development Kit and it is a software development environment that includes tools for developing, testing, and running Java applications. JRE stands for Java Runtime Environment and it is a software environment that provides the minimum requirements for running Java applications. JDK includes JRE, but JRE does not include JDK.

Q: What is the difference between JDK 11 and JDK 8?

A: JDK 11 and JDK 8 are two different versions of the Java SE Platform. JDK 11 is the latest release and the first long-term support (LTS) release since JDK 8. JDK 11 introduces many new features and enhancements that are not available in JDK 8, such as a new HTTP client API, a new local-variable syntax for lambda parameters, a new launch single-file source-code programs feature, a new dynamic class-file constants feature, a new low-overhead heap profiling feature, a new Unicode 10 support, a new Z Garbage Collector, a new Epsilon garbage collector, and new cryptographic algorithms. JDK 11 also removes some features and APIs that were deprecated or obsolete in JDK 8, such as Java EE modules, JavaFX modules, Nashorn JavaScript engine, and CORBA modules.

Q: How can I update my existing JDK to JDK 11?

A: You can update your existing JDK to JDK 11 by downloading the latest version from the Oracle website or from the OpenJDK website and installing it on your machine. You may need to uninstall or disable your previous JDK version before installing the new one. You may also need to update your environment variables and your IDE settings to point to the new JDK installation directory.

Q: How can I check if my application is compatible with JDK 11?

A: You can check if your application is compatible with JDK 11 by using the jdeps tool that comes with the JDK. The jdeps tool analyzes the dependencies of your application and reports any issues or warnings related to the use of deprecated or removed APIs, modules, or features. You can use the jdeps tool with the –jdk-internals option to identify any internal APIs that are not supported in JDK 11. You can also use the jdeps tool with the –multi-release option to analyze multi-release JAR files that contain different versions of classes for different Java releases.

Q: How can I learn more about Java programming with JDK 11?

A: You can learn more about Java programming with JDK 11 by reading the official documentation and tutorials available on the Oracle website or on the OpenJDK website. You can also find many online courses, books, blogs, podcasts, videos, and forums that cover various aspects of Java programming with JDK 11. Some of the popular resources are: – [Java SE 11 Developer Guide] – [Java SE 11 Tutorials] – [Java SE 11 API Specification] – [Java SE 11 Release Notes] – [Java SE 11 Language Changes] – [Java SE 11 Platform Changes] – [Java SE 11 Migration Guide] – [Java SE 11 FAQ] – [The Java Tutorials] – [The Java Programming Language Trail]

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