How to Download and Install Java JDK 12 Oracle
If you are a developer or a learner who wants to use the Java programming language, you will need a software tool called Java Development Kit (JDK). In this article, we will show you how to download and install Java JDK 12 Oracle, which is one of the latest versions of JDK available from Oracle. We will also explain what are the benefits of using Java JDK 12 Oracle, what are the prerequisites for installing it, how to set up the environment variables, and how to troubleshoot some common issues.
Introduction
Java JDK 12 Oracle is a software package that provides you with everything you need to develop, compile, run, debug, and test Java applications. It includes:
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The Java Runtime Environment (JRE), which contains the Java Virtual Machine (JVM) and the core libraries that enable you to run Java programs.
The Java compiler (javac), which converts your source code into executable bytecode that can run on any platform that supports Java.
The Java launcher (java), which allows you to execute your bytecode files or JAR files.
The Java debugger (jdb), which helps you find and fix errors in your code.
The Java documentation generator (javadoc), which creates HTML files that describe your code's API.
The Java shell (jshell), which is an interactive tool that lets you evaluate expressions, statements, and declarations in real time.
Other tools and utilities that enhance your productivity and performance as a Java developer.
Java JDK 12 Oracle is one of the feature releases of Java SE (Standard Edition) that are released every six months. It contains several new features and enhancements that improve the functionality, security, performance, and compatibility of the Java platform. Some of these features are:
Switch expressions, which simplify the syntax of switch statements and allow multiple values for each case.
Raw string literals, which let you write strings that span multiple lines without escaping special characters.
Dynamic class-file constants, which enable dynamic linking of constants that are not known at compile time.
Default CDS archives, which improve the startup time of applications by sharing common class data across different JVM processes.
Low-pause-time garbage collector (Shenandoah), which reduces pause times caused by garbage collection without compromising throughput or memory footprint.
Microbenchmark suite (JMH), which helps you measure the performance of small pieces of code in a reliable way.
Prerequisites
Before you can download and install Java JDK 12 Oracle, you need to make sure that your system meets the following requirements:
Operating SystemArchitectureDisk SpaceRAM
Windowsx64414 MB128 MB
Linuxx64, x86, ARM64, PPC64LE, S390X250 MB128 MB
macOSx64250 MB128 MB
SolarisSPARC64, x64130 MB128 MB
You also need to agree to the Oracle Technology Network License Agreement for Oracle Java SE, which is a legal contract that governs your use of Java JDK 12 Oracle. You can read the full text of the agreement .
To download Java JDK 12 Oracle, you need to have an Oracle account. If you don't have one, you can create one for free by following these steps:
Go to the and click on the Sign In button at the top right corner.
Click on the Create Account link below the sign in form.
Fill in your personal and contact information and choose a username and password.
Check the box to agree to the terms and conditions and click on the Create Account button.
Verify your email address by clicking on the link sent to your inbox.
Sign in to your Oracle account with your username and password.
Downloading Java JDK 12 Oracle
To download Java JDK 12 Oracle, you need to choose the right version and file format for your operating system. You can find the list of available downloads .
For example, if you are using Windows 10 64-bit, you can download the file named jdk-12.0.2_windows-x64_bin.exe, which is an executable installer that will guide you through the installation process. If you are using Linux 64-bit, you can download the file named jdk-12.0.2_linux-x64_bin.tar.gz, which is a compressed archive that you need to extract and run manually.
To download the file from the Oracle website, you need to follow these steps:
Go to the and find the file that matches your operating system and architecture.
Click on the file name to start the download process.
You will be prompted to sign in to your Oracle account if you haven't already.
You will also be asked to accept the license agreement by checking the box and clicking on the Download button.
The file will be downloaded to your default download location or the location you choose.
Installing Java JDK 12 Oracle
To install Java JDK 12 Oracle, you need to run the installer or extract the archive depending on the file format you downloaded. You also need to follow the instructions on the screen or in the documentation.
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For example, if you downloaded the executable installer for Windows, you need to follow these steps:
Double-click on the file name or right-click and choose Run as administrator.
You will see a welcome screen that shows the version and edition of Java JDK 12 Oracle. Click on Next to continue.
You will see a screen that shows the default installation directory and features. You can change them if you want or leave them as they are. Click on Next to continue.
You will see a progress bar that shows the installation status. Wait until it is completed and click on Close to exit.
You have successfully installed Java JDK 12 Oracle on your system.
If you downloaded the compressed archive for Linux, you need to follow these steps:
Navigate to the directory where you downloaded the file or move it to a preferred location.
Extract the file by using a command like tar -xvf jdk-12.0.2_linux-x64_bin.tar.gz or a graphical tool like Archive Manager.
You will see a new directory named jdk-12.0.2 that contains all the files and folders of Java JDK 12 Oracle.
You have successfully installed Java JDK 12 Oracle on your system.
Verifying the installation and checking the Java version
To verify that you have installed Java JDK 12 Oracle correctly and check its version, you need to open a command prompt or a terminal and run the java -version command. You should see an output like this:
java version "12.0.2" 2019-07-16 Java(TM) SE Runtime Environment (build 12.0.2+10) Java HotSpot(TM) 64-Bit Server VM (build 12.0.2+10, mixed mode, sharing)
If you see a different version or an error message, you may need to check your installation directory, environment variables, or PATH settings.
Setting up the environment variables
Environment variables are system-wide or user-specific settings that store information such as the location of executable files, libraries, or configuration files. They help your system and applications to find and use the resources they need.
For Java JDK 12 Oracle, you need to set up two environment variables: PATH and JAVA_HOME. The PATH variable tells your system where to look for executable files, such as java, javac, or jshell. The JAVA_HOME variable tells your system where to find the installation directory of Java JDK 12 Oracle.
The way to set up these variables depends on your operating system and preferences. Here are some general steps for each operating system:
Windows
Open the Control Panel and click on System and Security.
Click on System and then on Advanced system settings.
Click on the Environment Variables button at the bottom of the window.
In the System variables section, click on the New button.
In the Variable name field, enter JAVA_HOME.
In the Variable value field, enter the path to your Java JDK 12 Oracle installation directory, such as C:\Program Files\Java\jdk-12.0.2.
Click on OK to save the variable.
In the same section, find the variable named Path and click on the Edit button.
In the Edit environment variable window, click on the New button.
Enter %JAVA_HOME%\bin as the new entry and click on OK to save it.
Click on OK to close all the windows and apply the changes.
Linux
Open a terminal and run the following command to edit your .bashrc file, which is a script that runs every time you open a new shell session:
nano /.bashrc
Add the following lines at the end of the file, replacing /path/to/jdk-12.0.2 with your actual installation directory:
export JAVA_HOME=/path/to/jdk-12.0.2 export PATH=$PATH:$JAVA_HOME/bin
Save and close the file by pressing Ctrl+X and then Y.
Run the following command to reload your .bashrc file and apply the changes:
source /.bashrc
macOS
Open a terminal and run the following command to edit your .bash_profile file, which is a script that runs every time you open a new shell session:
nano /.bash_profile
Add the following lines at the end of the file, replacing /path/to/jdk-12.0.2.jdk with your actual installation directory:
export JAVA_HOME=/path/to/jdk-12.0.2.jdk/Contents/Home export PATH=$PATH:$JAVA_HOME/bin
Save and close the file by pressing Ctrl+X and then Y.
Run the following command to reload your .bash_profile file and apply the changes:
source /.bash_profile Conclusion
In this article, we have shown you how to download and install Java JDK 12 Oracle, which is a software package that provides you with everything you need to develop, compile, run, debug, and test Java applications. We have also explained what are the benefits of using Java JDK 12 Oracle, what are the prerequisites for installing it, how to set up the environment variables, and how to troubleshoot some common issues.
Java JDK 12 Oracle is one of the feature releases of Java SE that are released every six months. It contains several new features and enhancements that improve the functionality, security, performance, and compatibility of the Java platform. Some of these features are switch expressions, raw string literals, dynamic class-file constants, default CDS archives, low-pause-time garbage collector, and microbenchmark suite.
If you want to learn more about Java JDK 12 Oracle and how to use it effectively, you can check out the following resources:
The , which contains the detailed information and examples for each feature and tool.
The , which summarize the changes and updates in each version.
The , which provide step-by-step guides and exercises for beginners and advanced users.
The , which allow you to ask questions and get answers from other developers and experts.
FAQs
Here are some frequently asked questions and answers about Java JDK 12 Oracle:
What are some common issues and solutions for Java JDK 12 Oracle?
Some of the common issues that you may encounter when using Java JDK 12 Oracle are:
You get an error message saying that java is not recognized as an internal or external command. This means that your PATH variable is not set up correctly or does not include the bin directory of Java JDK 12 Oracle. You need to check your environment variables and make sure that they point to the right location.
You get an error message saying that the system cannot find the file specified or the file does not exist. This means that your JAVA_HOME variable is not set up correctly or does not point to the installation directory of Java JDK 12 Oracle. You need to check your environment variables and make sure that they point to the right location.
You get an error message saying that the java version is not compatible with your application or library. This means that your application or library requires a different version of Java than the one you have installed. You need to check the requirements of your application or library and install the appropriate version of Java JDK.
How to update Java JDK 12 Oracle to the latest version?
To update Java JDK 12 Oracle to the latest version, you need to follow these steps:
Go to the and find the file that matches your operating system and architecture for the latest version.
Download the file and run the installer or extract the archive as explained in the previous sections.
Update your environment variables to point to the new installation directory if needed.
Verify your installation and check your Java version as explained in the previous sections.
How to uninstall Java JDK 12 Oracle from your system?
To uninstall Java JDK 12 Oracle from your system, you need to follow these steps:
Delete the installation directory of Java JDK 12 Oracle from your system.
Delete or edit your environment variables that refer to Java JDK 12 Oracle if needed.
Delete any shortcuts or icons that link to Java JDK 12 Oracle if needed.
How to switch between different versions of Java JDK on your system?
If you have multiple versions of Java JDK installed on your system, you can switch between them by changing your environment variables. For example, if you have Java JDK 11 and Java JDK 12 installed on your system, you can switch from Java JDK 11 to Java JDK 12 by doing the following:
Change your JAVA_HOME variable to point to the installation directory of Java JDK 12.
Change your PATH variable to include the bin directory of Java JDK 12.
Verify your installation and check your Java version as explained in the previous sections.
How to use Java JDK 12 Oracle with an IDE or a text editor?
If you want to use Java JDK 12 Oracle with an integrated development environment (IDE) or a text editor, you need to configure them to use the correct Java version and features. The exact steps may vary depending on the IDE or editor you are using, but here are some general guidelines:
Open the preferences or settings of your IDE or editor and find the section that relates to Java or JDK.
Select or browse to the installation directory of Java JDK 12 Oracle as the default or preferred Java version.
Save and apply the changes and restart your IDE or editor if needed.
Create or open a Java project or file and check if the syntax highlighting, code completion, error detection, and other features work as expected.
Some of the popular IDEs and editors that support Java JDK 12 Oracle are:
, which is a powerful and versatile IDE that supports multiple languages and platforms.
, which is a smart and user-friendly IDE that offers advanced features and tools for Java development.
, which is a modular and lightweight IDE that focuses on simplicity and productivity for Java development.
, which is a fast and modern editor that supports multiple languages and extensions, including Java.
, which is a sophisticated and customizable editor that supports multiple languages and plugins, including Java.
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