Openjdk uninstall mac os

How To Install / Uninstall Multiple Java Versions In Mac OS By Home Brew Or Manually

This article will tell you how to install/uninstall multiple java versions on mac os both use homebrew or manually. It also shows you how to set JAVA_HOME & PATH system environment variable to make your installed JDK as the default JDK. We recommend you to use homebrew because it provides a lot of easy-to-use tools.

1. Use HomeBrew To Install & Uninstall Java On Mac OS X.

1.1 Use HomeBrew Cask Command To Install Java JDK.

1. Install HomeBrew on your mac os, please read the article How To Install HomeBrew On Mac OS.
2. Run the below command to install the homebrew cask extension, cask extension tool can help you to install and manage software packages easily.
3. Run brew search java or brew search jdk command to find your desired java or JDK version. Below is the search result for the command brew search java .

Below is the search result for the command brew search jdk .

Now install the JDK version that you need like below. During the installation process, you may encounter some error messages like Error: Cask ‘java8’ is unavailable: No Cask with this name exists or Error: Cask adoptopenjdk8 exists in multiple taps.

Below is the correct command to install JDK 8 use the homebrew cask command ( $ brew cask install homebrew/cask-versions/adoptopenjdk8 ). You can also run $ brew cask install java to install the newest JDK version. In this example, I had installed the newest JDK version 12.0.1.

After install you can first run the command /usr/libexec/java_home to get the java home directory, then go to the JDK home directory to see all the installed JDK.

From the above output, we can see that there are three java JDK that has been installed, two open JDK, and one standard JDK. Run each JDK’s java executable command, you can get the below output.

1.2 Use HomeBrew Cask Command To UnInstall JDK.

1. Run homebrew cask command $ brew cask uninstall java to uninstall open JDK 12.0.1. If you want to uninstall open JDK 8 then run $ brew cask uninstall caskroom/versions/adoptopenjdk8 .
   Below command uninstall open JDK 12.0.1.

Below command uninstall open JDK 8.

During the above JDK uninstall process, you may encounter the below error, Error: Cask adoptopenjdk8 exists in multiple taps. This is because you should uninstall caskroom/versions/adoptopenjdk8 instead of adoptopenjdk8.

Now go to JDK installation directory, you will find above two homebrew installed JDK directory has been removed.

2. Install & Uninstall JDK In Mac OS Manually.

2.1 Install JDK Manually In Mac OS X.

1. Download related JDK from oracle JDK download page. You should have an oracle account to log in before the download start.
2. Double click the downloaded dmg file to install JDK, just follow the wizard to install it.
3. When the installation complete, you can find the JDK install directory in folder /Library/Java/JavaVirtualMachines/. From the below output, we can see there are three JDK that has been installed, one ( adoptopenjdk-8.jdk ) is installed with homebrew, the other two ( jdk-12.0.1.jdk, jdk1.8.0_211.jdk ) are installed by download installation file from oracle.

2.2 Uninstall Java JDK Manually In Mac OS X.

Follow oracle’s documents, to manually uninstall installed JDK in mac os x, you just need to remove some files with root permission in the terminal like below.

1. 1. Open a terminal and run the below command to remove the java JDK installed directory.
   2. Run the below command to remove the java control panel if exist.
   3. Remove java applet plugins.
   4. Remove java application support.
   5. Remove the java updater list.

1. 1. Remove the java helper tool.

3. Set JAVA_HOME & PATH System Environment Variable.

Now we have known how to install/uninstall multiple java JDK versions on mac os. But after that, you need to set JAVA_HOME & PATH environment variable value to set your installed JDK as default JDK. So that you can use it easily.

1. Run the below command in a terminal to go to the user home directory.
2. Run $ vim .bash_profile command to open .bash_profile file to edit.
3. Press esc then press i to enter insert mode and insert the below export command in .bash_profile file.
4. Press esc then :wq! to save the above changes and quit the vim editor.
5. Run $ source .bash_profile command to make the above changes take effect.
6. Now run $ java -version , you can see the new JDK version is used by output info.

4. Question & Answer.

4.1 How to manage multiple JDK versions on mac OS X use SDKMAN .

1. My macOS is Catalina Version 10.15.7, and I run the command /usr/libexec/java_home -verbose to find all the installed JDK versions. I installed JDK 12.0.1 and OpenJDK 1.8.0.

Now I want to install and manage more other JDK versions in it, how to manage the multiple JDK versions, thanks.

You can use SDKMAN to manage multiple JDK versions. The SDKMAN supports all Unix-style OS. Open a terminal and run the command curl -s «https://get.sdkman.io» | bash to install it.

Open a new terminal and run the command $ source «$HOME/.sdkman/bin/sdkman-init.sh» to initialize the SDKMAN.

Run the command $ sdk version to verify the SDKMAN version and make sure it is installed successfully.

Now you can run the command $ sdk list java to list all the available JDK versions you can install and manage with SDKMAN.

Run the command $ sdk install java jdk-identifier to install the JDK from the above list. You can find the JDK identifier from the last column of the list.

We can install two JDK versions, so we run the command $ sdk install java 15.0.2.7.1-amzn to install an amazon provided JDK.

When the installation complete, you can find the SDKMAN installed JDK in the directory

You can switch to use one JDK with the command $ sdk use java java-identifier .

You can also use SDKMAN to manage your existing JDK.

First, get your existing JDK installed path with the command $ /usr/libexec/java_home -verbose .

What you need to do is just give your existing JDK a label in SDKMAN with the command $ sdk install java local-jdk-tag local-jdk-install-path .

Now you can run the command $ sdk use java local-jdk-tag to use your local JDK version.

Now you can run the command env to find that SDKMAN has manipulated the JAVA_HOME system environment for you automatically.

You can also find the SDKMAN_DIR and SDKMAN_CANDIDATES_DIR in the system environment variables.

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Osx Uninstaller

“I need to remove OpenJDK on my mac. I am lost at the instructions given in the link above, can someone give me step by step directions on how to uninstall it?
My current version is (build 1.8.0_05-b13) I got this from terminal, thanks a lot.”

This page describes how to uninstall OpenJDK for OS X computers. Let’s check for more information & details how could easily get rid of JDK from Mac computer.

What is OpenJDK?

If you don’t know about what OpenJDK is, then read this introduction below to learn more, so it could be better when remove it.

OpenJDK (Open Java Development Kit) is a free and open-source implementation of the Java Platform, Standard Edition (Java SE). It is the result of an effort Sun Microsystems began in 2006. The implementation is licensed under the GNU General Public License (GNU GPL) version 2 with a linking exception. Were it not for the GPL linking exception, components that linked to the Java class library would be subject to the terms of the GPL license. OpenJDK is the official reference implementation of Java SE since version 7.

The goal of this Project is to produce a high-quality, open source version of JDK 7 for the Mac. The final release has the following goals:

• Pass all appropriate certification tests for Java SE 7
• Include a complete, native Cocoa-based UI Toolkit
• Provide excellent performance

Community

Status

Requirements

• Hardware: Any 64-bit capable Intel Mac
• RAM: 2GB min, 4GB recommended
• OS: Mac OS X 10.7

Choose one that most fit your situation to compete remove OpenJDK for Mac, if one of them is not working, then try the other.

Remove OpenJDK from macOS by Library Command

To uninstall the JDK, you must have Administrator privileges and execute the remove command either as root or by using the other removal tool.

Navigate to /Library/Java/JavaVirtualMachines and remove the directory whose name matches the following format:

For example, to uninstall 8u6:

Do not attempt to uninstall Java by removing the Java tools from /usr/bin. This directory is part of the system software and any changes will be reset by Apple the next time you perform an update of the OS.

Remove OpenJDK from macOS by Osx Uninstaller

More and more cases show that the third party removal tool is the best way to remove an unwanted app on macOS, especially when you have tried the manual approach but cannot get rid of it. That’s not strange, instead of using Library Command, you can totally try Osx Uninstaller to easily remove OpenJDK, which is much easier for most users.

Download Osx Uninstaller on your Mac, and begin the easy removal tour—remove OpenJDK cleanly in a short time all together with its leftovers.

Follow these steps:

Step 1. Select OpenJDK which you need to remove in the list, easily hit Run Analysis button.

Step 2. Then, the uninstaller will analysis the target app as fast as in a few seconds later, click the button “Complete Uninstall” when all the related folders and flies appeared in the list.

Step 3. The tool will easily delete all the related folders and flies scanned in Step 2, now press Back to Step 1 and click Refresh, OpenJDK is gone from the list.

Now, OpenJDK is gone for good in your macOS computer, you don’t have to worry about the remaining issue on the hard drive.

Determining the Default Version of the JDK

If you have not yet installed Apple’s Java OS X 2012-006 update, then you are still using a version of Apple Java 6 that includes the plug-in and the Java Preferences app. See “Note for Users of OS X that Include Apple Java 6 Plug-in”.

There can be multiple JDKs installed on a system, as many as you wish.

When launching a Java application through the command line, the system uses the default JDK. It is possible for the version of the JRE to be different than the version of the JDK.

You can determine which version of the JDK is the default by typing java -version in a Terminal window. If the installed version is 8u6, you will see a string that includes the text 1.8.0_06. For example:

% java -version
java version “1.8.0_06-ea”
Java(TM) SE Runtime Environment (build 1.8.0_06-ea-b13)
Java HotSpot(TM) 64-Bit Server VM (build 23.2-b04, mixed mode)

To run a different version of Java, either specify the full path, or use the java_home tool:

% /usr/libexec/java_home -v 1.8.0_06 –exec javac –version

Why OracleJDK over OpenJDK?

The CaféX Fusion Application Server has class dependencies that are only satisfied by the Oracle Java stack. Due to this we only develop and test our software suite against Oracle’s JDK and JRE, allowing us to guarantee the behaviour of both our software, and the environment it is installed in.

Therefore, any other Java implementation is not supported.

Is OracleJRE supported?

It supports both Oracle JDK and Oracle JRE environments. It supports versions 1.7 and 1.8 of both.

Here’s the knowledge of how to uninstall Java JDK 8 9 in macOS Sierra 10.12 from OSPY:

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Question: Q: What is the best way to remove openjdk

This is on a late 2015 iMac with Catalina 10.15.6.

I needed to view IP’s on my home network so I installed Angry IP Scanner. When I was installing it said it required OpenJDK so I installed it (OpenJDK 14). I’m curious if I should remove both of these and if so, how to remove OpenJDK. Anyone have any ideas? Been Googling and it seems the answers are either too old or by people that don’t know what they’re talking about. They keep saying to open the applications folder and move it to trash, but it’s not an app so it doesn’t appear in the applications folder.

Thanks in advance for your time and your help.

iMac Line (2012 and Later)

Posted on Aug 6, 2020 11:57 AM

I think they are referring to the downloaded application, not the JDK. Nevertheless, it is conceivable that deleting the application will also delete the JDK. If it does not, then you will need to search Oracle’s site for an uninstaller or ask their tech support how the JDK can be removed. Also, see the following:

Basics for Uninstalling Software

Most OS X applications are completely self-contained «packages» that can be uninstalled by simply dragging the application to the Trash. Applications may create preference files that are stored in the /Home/Library/Preferences/ folder. Although they do nothing once you delete the associated application, they do take up some disk space. If you want you can look for them at the above location and delete them, too.

Some applications may install an uninstaller program that can be used to remove the application. If you cannot find the uninstaller then you could download the freeware, Easy Find, to locate files that need to be removed. The places you need to search include:

1. /Home/Library/Applications Support/ folder. Check if the application has created a folder then delete the folder that’s in the Applications Support folder.
2. Applications may install a startupitem or a LogIn item. StartupItems are usually installed in the /Library/StartupItems/ folder or the /Home/Library/StartupItems/ folder. Login Items are set in the Users & Groups preferences. Open it in System Preferences, then click on the Login Items tab. Select the item from the list and click on the Delete [-] button to remove it.
3. Some software use startup daemons or agents. Look for them in /Library/LaunchAgents/ and /Library/LaunchDaemons/ or in /Home/Library/LaunchAgents/.

Some applications install a receipt in the /Library/Receipts/ folder. Usually with the same name as the program or the developer. The item generally has a «.pkg» extension. Be sure you also delete this item as some programs use it to determine if it’s already installed.

There are many utilities that can uninstall applications. Here is a selection:

For more information visit The XLab FAQs and read the FAQ on removing software.

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