How to install Java JDK (Java Development kit 12) on Mac OS. Download and install Java on Mac OS X. We will also update the JAVAHOME environment variable ne. Under Oracle Java, only a single version of the JRE can be installed at a time. See Installing the JRE on macOS. To access the Java Control Panel, in the System Preferences panel, click the Java icon. If you don't see the Java icon in the System Preferences, in the Other section, then you do not have an Oracle.
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Java is a general-purpose, secure, robust, object-oriented language developed by Sun Microsystems in 1990. Java is portable which means it follows to write once run anywhere paradigm. Many of the useful application are build on Java and required Java runtime environment. If you are preparing your system for the developing new java applications, you need to install JDK on your machine.
The latest version is Java 15 which was released in September 15, 2020. This tutorial helps you to install Java on macOS system.
Step 1 – Prerequisites
At the time of writing this tutorial the available version, Java 11 LTS and Java 15 latest for the installation. Tap adoptopenjdk/openjdk- Use the following commands to view the details about java versions to be install. Download the Mac OS X installer lift-java.pkg. Double-click lift-java.pkg to install the software. Enter your Mac OS X password when prompted and use all of the default options.
Before starting the installation of Java using this tutorial you must have the following prerequisites
- Terminal: You must have Mac Terminal access and little knowledge about working with the terminal application. Ao login to your Mac system and open terminal
- Homebrew: This tutorial relies on Homebrew, So you must have homebrew installed. Homebrew can be installed with a single command.
For more instruction visit Homebrew installation tutorial.
Step 2 – Install JAVA on macOS
At the time of writing this tutorial the available version, Java 11 LTS and Java 15 latest for the installation.
- Tap adoptopenjdk/openjdk- Use the following commands to view the details about java versions to be install.
- Search Available JDK- View all the available Java versions to install
- Install Java – Use one of the following commands to install Java 8, 9, 10, 11, 12, 13, 14 and 15. Generally, we required Java 8, 11 LTS versions.
The installation process may take some time to complete depending on your network speed.
- Check Version – Once the installation finished, verify the installed Java version.
Default latest installed version will be active on your machine.
Step 3 – Switching Between Java Version's
You system may have installed multiple Java versions. For example, I have installed Java 8, 11 and 15 on my system. To view the installed Java version execute:
Create or edit the existing ~/.bash_profile in your favorite text editor. Then export JAVA_HOME environment variable to specific java version, you want to use as default on Mac.
Save file and close it. The above settings will make JAVA_HOME point to JAVA 11.
Execute the following command to reload environment.
All done, check the current active java version
When you want to switch JDK version again, update the ~/.bash_profile and export JAVA_HOME to other JDK version.
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Conclusion
This tutorial explained you to how to install Java on macOS. Also provides you steps to switching between multiple installed Java versions.
You can visit Github page of the OpenJDK casks.
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Last updated: January 16, 2019
Update: Please see our Java Support in Safari 12 article for the latest information on Java support in Safari on macOS. The option to allow plug-ins described below is no longer supported by Safari.
No matter which web browser you use on your computer, you will need the Java plug-in from Oracle in order to view content that uses Java, such as Java applets. The Safari web browser on Mac from Apple is no exception. Java applets are common on the Internet. It is important, therefore, to know how to enable and disable Java in Safari on Mac if it is your web browser of choice.
First, please be certain the version of Java on your computer is current. Once you have verified Java is installed on your computer, please follow the instructions below to learn how to enable or disable Java in Safari on Mac.
1. Launch the Safari application, and click the Safari file menu. Select Preferences from the drop-down menu.
2. The Preferences dialog will launch in a new window. Click the Security icon.
To enable Internet plug-ins, including Java, to load in Safari, check the Internet Plugins: Allow Plug-ins check box. Unlike Safari on Windows, there is no individual check box for Enable Java for Safari on Mac.
3. When you encounter Java content in Safari, Safari will block the content from loading. You will see a notification in the browser window where the Java content would otherwise load:
4. Click the right-arrow in the notification. A Do you want to trust the website… dialog will display.
In this case, we visited the Java.com web site to load a test Java applet. Since we trust the web site, we clicked the Trust button to allow java.com to use the Java plug-in. When we re-visit the Java content on this web site, the Java content will now display.
5. You can manage your trusted web sites, and choose degrees of trust, by returning to the Security settings of Safari's Preferences window. Adjacent to the Internet Plugins: Allow Plug-ins check box, click the Website Settings… button.
A new dialog will launch. The dialog displays all of the Internet plug-ins currently installed. To manage the web sites you have trusted to use the Java plug-in, click Java in the left navigation pane. The list of web sites you have already trusted will display.
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Use the pull-down menu adjacent to the web site in the list to choose a level of trust you want to extend to this site. You may choose from Ask, Block, Allow or Allow Always (or Run In Unsafe Mode). You may delete a web site from this list by highlighting it with your mouse, and clicking the minus button at the bottom of the list.
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