JDK 8 Download: A Complete Guide
If you are a Java developer or a Java enthusiast, you might have heard about JDK 8, the latest version of Java Development Kit. But what is JDK 8 and why should you care about it? In this article, we will answer these questions and show you how to download and install JDK 8 on your system.
What is JDK 8 and why it is important
JDK stands for Java Development Kit, which is a software development environment used to develop Java applications and applets. It contains Java Runtime Environment (JRE), which is the implementation of Java Virtual Machine (JVM) that runs Java programs, and other development tools like compiler, debugger, archiver, and document generator.
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JDK 8 is the latest release of Java SE Platform, which was launched in March 2014. It is a major release that introduces many new features and enhancements to the Java programming language, JVM, tools, and libraries. Some of the important features of Java 8 are:
Lambda expressions, which allow us to write concise and functional code
Method references, which allow us to refer to existing methods using a simple syntax
Functional interfaces, which are interfaces that have only one abstract method
Stream API, which provides a new way of processing collections of data in a declarative and parallel manner
Default methods, which allow us to add new methods to interfaces without breaking compatibility
Date/Time API, which provides a new and improved way of handling date and time values
Nashorn JavaScript Engine, which allows us to execute JavaScript code dynamically at JVM
Parallel Array Sorting, which improves the performance of sorting arrays using multiple threads
Type and Repeating Annotations, which enhance the expressiveness and usefulness of annotations
IO and Concurrency Enhancements, which improve the efficiency and scalability of input/output and concurrent operations
The benefits of JDK 8 over previous versions are manifold. It improves the performance, readability, modularity, and maintainability of Java code. It also enables us to use functional programming paradigms in Java, which can lead to more elegant and robust solutions. It also makes Java more compatible and interoperable with other languages and platforms.
How to download JDK 8
There are two main sources from where you can download JDK 8: Oracle website and OpenJDK website. Oracle website provides the official binaries of Oracle JDK, which are free to use in production and free to redistribute under certain terms and conditions. OpenJDK website provides the open source implementation of Oracle JDK, which are also free to use in production and free to redistribute under GNU General Public License.
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System requirements and supported platforms
Before you download JDK 8, you should check the system requirements and supported platforms for your operating system. The system requirements for installing JDK 8 are:
A processor that supports SSE2 instruction set ( such as Intel Pentium 4 or AMD Opteron)
At least 128 MB of RAM
At least 124 MB of disk space
The supported platforms for JDK 8 are:
Operating SystemArchitecture
Windows 10, 8.1, 8, 7, Vista, Server 2012, Server 2008 R2x86, x64
Linux (Ubuntu, Red Hat, SUSE, Oracle Linux, etc.)x86, x64, ARMv7, ARMv8
Mac OS X 10.8.3 or laterx64
Solaris 10 or laterSparc, x64
Steps to download JDK 8 from Oracle website
To download JDK 8 from Oracle website, you need to follow these steps:
Go to the .
Select the JDK Download button under Java SE Development Kit 8u301.
Accept the license agreement and choose the download link for your operating system and architecture.
Save the file to your desired location and wait for the download to complete.
Steps to download JDK 8 from OpenJDK website
To download JDK 8 from OpenJDK website, you need to follow these steps:
Go to the .
Select the JDK Download button under OpenJDK 8 (LTS).
Choose the download link for your operating system and architecture.
Save the file to your desired location and wait for the download to complete.
How to install JDK 8
After you have downloaded JDK 8, you need to install it on your system. The installation process may vary depending on your operating system. Here are the steps to install JDK 8 on Windows, Linux, and Mac OS X.
Steps to install JDK 8 on Windows
To install JDK 8 on Windows, you need to follow these steps:
Double-click on the downloaded file (jdk-8u301-windows-x64.exe or jdk-8u301-windows-x86.exe) and follow the instructions of the installer.
Select the destination folder where you want to install JDK 8 and click Next.
Select the features that you want to install and click Next.
Wait for the installation to complete and click Close.
Steps to install JDK 8 on Linux
To install JDK 8 on Linux, you need to follow these steps:
Open a terminal window and navigate to the folder where you have downloaded the file (jdk-8u301-linux-x64.tar.gz or jdk-8u301-linux-x86.tar.gz).
Extract the file using the command: tar -xvf jdk-8u301-linux-x64.tar.gz or tar -xvf jdk-8u301-linux-x86.tar.gz.
Move the extracted folder (jdk1.8.0_301) to a suitable location using the command: sudo mv jdk1.8.0_301 /usr/lib/jvm/.
Set the ownership and permissions of the folder using the command: sudo chown -R root:root /usr/lib/jvm/jdk1.8.0_301/ and sudo chmod -R a+r /usr/lib/jvm/jdk1.8.0_301/.
Add the JDK bin directory to your PATH variable using the command: export PATH=/usr/lib/jvm/jdk1.8.0_301/bin:$PATH. You can also add this line to your /.bashrc file for permanent effect.
Steps to install JDK 8 on Mac OS X
To install JDK 8 on Mac OS X, you need to follow these steps:
Double-click on the downloaded file (jdk-8u301-macosx download and install JDK 8 on different operating systems. We have also learned how to set the environment variables and verify the installation of JDK 8. We hope that this article has helped you to get started with JDK 8 and enjoy its features and benefits. If you want to learn more about JDK 8 and Java 8, you can check out the following resources: -
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FAQs
Here are some frequently asked questions about JDK 8 and Java 8:
What is the difference between JDK and JRE?
JDK stands for Java Development Kit, which is a software development environment used to develop Java applications and applets. It contains JRE, which is the implementation of JVM that runs Java programs, and other development tools like compiler, debugger, archiver, and document generator.
JRE stands for Java Runtime Environment, which is a software package that provides the minimum requirements to run Java programs. It contains JVM, which is the engine that executes Java bytecode, and other core components like libraries, class loader, and security manager.
What is the difference between Oracle JDK and OpenJDK?
Oracle JDK is the official binaries of Oracle Java SE Platform, which are free to use in production and free to redistribute under certain terms and conditions. Oracle JDK is based on the source code of OpenJDK, but it may contain some additional features or bug fixes that are not available in OpenJDK.
OpenJDK is the open source implementation of Oracle Java SE Platform, which are also free to use in production and free to redistribute under GNU General Public License. OpenJDK is developed by a community of developers and contributors from various organizations and individuals.
What are some of the new features of Java 8?
Some of the new features of Java 8 are:
Lambda expressions, which allow us to write concise and functional code
Method references, which allow us to refer to existing methods using a simple syntax
Functional interfaces, which are interfaces that have only one abstract method
Stream API, which provides a new way of processing collections of data in a declarative and parallel manner
Default methods, which allow us to add new methods to interfaces without breaking compatibility
Date/Time API, which provides a new and improved way of handling date and time values
Nashorn JavaScript Engine, which allows us to execute JavaScript code dynamically at JVM
Parallel Array Sorting, which improves the performance of sorting arrays using multiple threads
Type and Repeating Annotations, which enhance the expressiveness and usefulness of annotations
IO and Concurrency Enhancements, which improve the efficiency and scalability of input/output and concurrent operations
How can I update my existing Java applications to use Java 8?
To update your existing Java applications to use Java 8, you need to follow these steps:
Make sure that you have installed JDK 8 on your system and set the environment variables correctly.
Open your IDE or text editor and change the source compatibility level to Java 8.
Recompile your source code using JDK 8 compiler.
Test your application using JDK 8 runtime.
Refactor your code to use the new features of Java 8 where appropriate.
How can I uninstall JDK 8 from my system?
To uninstall JDK 8 from your system, you need to follow these steps:
Delete the JDK installation folder from your system.
Delete the JDK bin directory from your PATH variable.
Delete the JDK lib directory from your CLASSPATH variable.
Delete any references to JDK from your registry or configuration files.
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