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Download JRE 8 and JRE 17: The Latest Versions of Java SE Platform


How to Download and Install JRE (Java Runtime Environment) on Your Computer




If you want to run Java applications or applets on your computer, you need to have JRE (Java Runtime Environment) installed. JRE is a software package that provides the necessary libraries, tools, and components to execute Java programs. In this article, we will explain what JRE is and why you need it, how to check if you have it installed on your computer, how to download it from the official website, how to install it on your computer, and how to verify if it is working properly.




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What is JRE and Why Do You Need It?




JRE is one of the three interrelated components for developing and running Java programs. The other two components are JDK (Java Development Kit) and JVM (Java Virtual Machine). Let's see how they differ and relate to each other.


JRE vs JDK vs JVM




JDK is a set of tools for developing Java applications. It includes a compiler, a debugger, a documentation generator, and other utilities. It also contains a compatible JRE, which is required to run Java programs.


JVM is a software layer that runs on top of your operating system and interprets Java bytecode. Java bytecode is the result of compiling Java source code using the JDK. JVM enables Java programs to run on any platform that supports JVM, without requiring any modification.


JRE is a subset of JDK that contains only the essential components to run Java programs. It includes JVM, Java class libraries, and other resources. It does not include any development tools or compilers.


So, if you are only interested in running Java programs on your computer, you only need JRE. If you are planning to develop Java programs, you need JDK instead.


JRE Components and Functions




JRE consists of the following main components:


  • Class Loader: It dynamically loads all the classes needed to run a Java program.



  • Bytecode Verifier: It checks the format and accuracy of Java bytecode before passing it to the interpreter.



  • Interpreter: It creates an instance of JVM that executes the Java bytecode natively on your machine.



  • Deployment Solutions: They simplify the activation of Java applications and provide support for future updates. They include Java Web Start and Java Plugin.



  • Development Toolkits: They help developers improve their user interface. They include Swing, AWT, JavaFX, Image I/O, Sound, etc.



  • Base Libraries: They provide core functionality for Java programs. They include lang and util, networking, security, math, XML processing, etc.



How to Check If You Have JRE Installed on Your Computer




The easiest way to The easiest way to check if you have JRE installed on your computer is to use the command line. Depending on your operating system, you can follow these steps:


Windows




Open the Command Prompt by pressing Windows + R keys and typing cmd in the Run box. Then, type java -version and press Enter. You should see something like this:


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java version "1.8.0_301" Java(TM) SE Runtime Environment (build 1.8.0_301-b09) Java HotSpot(TM) 64-Bit Server VM (build 25.301-b09, mixed mode)


If you see a message like "java is not recognized as an internal or external command", it means you do not have JRE installed or it is not added to your PATH environment variable.


Mac OS




Open the Terminal by pressing Command + Space keys and typing terminal in the Spotlight search box. Then, type java -version and press Enter. You should see something like this:


java version "1.8.0_301" Java(TM) SE Runtime Environment (build 1.8.0_301-b09) Java HotSpot(TM) 64-Bit Server VM (build 25.301-b09, mixed mode)


If you see a message like "No Java runtime present, requesting install", it means you do not have JRE installed or it is not added to your PATH environment variable.


Linux




Open the Terminal by pressing Ctrl + Alt + T keys or clicking on the Terminal icon in the menu bar. Then, type java -version and press Enter. You should see something like this:


java version "1.8.0_301" Java(TM) SE Runtime Environment (build 1.8.0_301-b09) Java HotSpot(TM) 64-Bit Server VM (build 25.301-b09, mixed mode)


If you see a message like "bash: java: command not found", it means you do not have JRE installed or it is not added to your PATH environment variable.


How to Download JRE from the Official Website




If you do not have JRE installed on your computer or you want to update to the latest version, you can download it from the official website of Oracle, which is the company that develops and maintains Java.


Choose the Right Version for Your Operating System and Browser




The first step is to choose the right version of JRE for your operating system and browser. You can go to this link and select your platform from the drop-down menu. You will see a list of compatible browsers and operating systems for each version of JRE.


For example, if you are using Windows 10 and Chrome browser, you can choose Windows x64 Offline as your platform.


Accept the License Agreement and Download the Installer




The next step is to accept the license agreement and download the installer file. You can scroll down to the bottom of the page and check the box that says "I accept the Oracle Binary Code License Agreement for Java SE". Then, click on the download link that corresponds to your platform.


For example, if you chose Windows x64 Offline as your platform, you can click on jre-8u301-windows-x64.exe as your download link.


You will be prompted to save the installer file to your computer. Choose a location where you want to save it and click Save.


How to Install JRE on Your Computer




The final step is to install JRE on your computer using the installer file that you downloaded from the official website. Depending on your operating system, you can follow these steps:


Windows




You can install JRE on Windows using either online or offline installation methods.


Online Installation




This method requires an active internet connection during the installation process.


  • Double-click on the installer file that you downloaded from the official website.



  • A dialog box will appear asking if you want to run this file. Click Run.



  • A security warning will appear asking if you want to allow this app to make changes to your device. Click Yes.



  • A welcome screen will appear showing the progress of downloading and installing JRE.



  • A setup wizard will appear guiding you through the installation process. Click Next.



  • A destination folder screen will appear asking where you want to install JRE. You can keep the default location or change it by clicking Change. Click Next.



  • An installation options screen An installation options screen will appear asking if you want to install the Java Browser Plugin and the Java Web Start Launcher. You can check or uncheck the boxes according to your preference. Click Next.



  • A progress screen will appear showing the status of the installation.



  • A completion screen will appear confirming that JRE has been successfully installed. Click Close.



Offline Installation




This method does not require an internet connection during the installation process.


  • Double-click on the installer file that you downloaded from the official website.



  • A dialog box will appear asking if you want to run this file. Click Run.



  • A security warning will appear asking if you want to allow this app to make changes to your device. Click Yes.



  • A setup wizard will appear guiding you through the installation process. Click Next.



  • A destination folder screen will appear asking where you want to install JRE. You can keep the default location or change it by clicking Change. Click Next.



  • An installation options screen will appear asking if you want to install the Java Browser Plugin and the Java Web Start Launcher. You can check or uncheck the boxes according to your preference. Click Next.



  • A progress screen will appear showing the status of the installation.



A completion screen will appear conf


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