Remove all java versions windows

How to Uninstall Java for Windows 10

We will look at how to uninstall and remove Java completely from a Windows 10 system through tools. Invented by James Gosling, Java is an extremely popular, object-oriented programming language. The first version came out in 1996. Since then, there have been many versions of Java released. In this article, we will learn why and how to uninstall older versions of Java from a Windows 10 system.

1. Introduction

A new version of Java comes roughly every 6 months (prior to Java 8, this cycle was about 2-3 years). The newer versions contain fixes for issues in the earlier version, newer features, classes, and packages. Oracle recommends upgrading to the newer versions and uninstalling the older one.

1.1 Why should I uninstall Java versions which are old?

Before we see the steps to uninstall, we will first understand why keeping and using older versions of Java is dangerous.

We highly recommend that you uninstall all older versions of Java from your system.
Keeping old versions of Java on your system presents a serious security risk.
Uninstalling older versions of Java from your system ensures that Java applications will run with the latest security and performance improvements on your system. Oracle on Java.com

Every new Java version releases fixes related to security and bugs from the older version. Using an older version of Java poses serious security threats. Flashback which affected Apple Macs is the most dramatic example of the security threat of old Java versions.

2. Why does Java not Uninstall the older version when I upgrade?

Java lets you install more than one version of Java on a system. The user can choose which version to run their Java application with. So, Java itself does not uninstall the earlier versions while upgrading. However, Oracle does not recommend this as it leaves your system open to security leaks.

2.1 Why would I need to run multiple versions of Java?

• Java generally provides back-compatibility i.e. all the features that worked in the earlier version will work in the same way in the next version as well.
• However, at times, some features of java do not work the same way as the older version due to changes in the code.
• Also, some features may be deprecated in the newer version of Java. Example: Applets were deprecated in Java 9 and later removed from Java 11 onwards. So, if we have an application that relies on these deprecated/removed features, we will require an older version of Java.
• In some cases, some legacy applications specify that they require a certain version of Java to run. In this case, as well we would require an older version.

3. How do I check which Java versions are installed on my system?

We can check the installed Java versions using 2 methods.

3.1 In the Program Files

• Open the Windows Explorer.
• Navigate to the path: C:/Program Files OR C:/Program Filesx86
• Check for the folder named: Java.
• In this folder, you will see the Java Development Kit (JDK) and/or Java Runtime Environment (JRE) installed on your system including the version numbers. For example I have Java version 7 ( jdk1.7.0_80 ), Java version 8 ( jre1.8.0_261 ), Java version 11 ( jdk-11.0.8 ) an Java version 14 ( jdk-14.0.2 ) installed on my system.

3.2 Using the “where” command

• Open the Command Prompt by typing cmd in the “Type here to search” box and click on the first option.
• Another way is to press the Windows icon + R on the keyboard to open run and then type cmd .
• Then type in where command. This will show the path all the different versions of java executables present in the system. (They need to be added to the classpath)

4. How do I uninstall the Older versions of Java?

There are 3 methods with which we can uninstall Java on our system.

4.1 Using the Java uninstall tool

Oracle provides the Java uninstall tool for removing Older versions of Java in the system. Go to the page, accept the Terms and download the JavaUninstallTool.exe file. Once downloaded we need to run it and follow the steps in the tool. The output should be similar to the image.

4.2 Uninstall through the Control Panel

1. In the search box type “Programs”.
2. Select the “Add or remove programs” option. This opens the path
3. In the Search List, type Java. This should show you all the Java versions installed on the System.
4. Click on the uninstall button for the version you want to uninstall.

4.3 OpenJDK uninstall

For uninstalling OpenJDK java installs, simply delete the extracted folder for Java.

5. How to remove Java completely from my system?

To remove all versions of Java installed on the system, repeat the steps for “Uninstall Java through the Control Panel.” That we have seen for removing older versions of Java. Repeat the steps for every installed version of Java. Example: On my system I would have to repeat twice because there are 2 versions Java version 11 and Java version 14 installed on my system.

If the Java versions installed are OpenJDK versions, delete the extracted folders.

6. Clearing the PATH variable

1. In the type box, type “Environment Variables” and select the first option.
2. Open the Environment Variables and select the “PATH” variables from the System variables list and click on “Edit”.
3. In the environment variables, remove all the Java Paths for the versions we have removed.
4. Repeat the same steps for the PATH variable in the “User variables” as well.

7. What if a Java uninstall fails?

In the rare scenario that a Java uninstall fails for any reason, Oracle recommends using the Microsoft Utility to correct the registry entries. Alternatively, we can correct the registry entries manually too. For more details, please check here.

8. Verify successful un-installation

To check if we have uninstalled Java correctly we have three ways.

8.1 Through the Control Panel

• Type “Programs” in the search box.
• Select the “Add or remove programs” which opens the path: Control Panel\Programs\Programs and Features
• In the Search, type “Java”. It should not return any results.

8.2 Using the java -version command

Open the Command Prompt and type in java -version command. It gives give a message : “Java is not recognized.” . This means that Java is not installed on our system.

8.3 Using the where command

• The other way to check is using the where command in the Command Prompt.
• Open the Command Prompt by typing cmd in the “Type here to search” box and click on the first option.
• Another way is to press the “Windows icon” + R on the keyboard to open run and then type cmd .
• It should return an error message saying “Could not find the files for the given pattern(s)”.

9. Summary

In the article, we learned how and why to uninstall older versions of Java from a Windows system. We also learned how remove Java completely. Further, we can also Disable Java on web browsers used on the Windows system. Visit the Oracle Java page for instructions to disable java.

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Removing outdated Java versions: A guide

In addition, I had to use separate commands to uninstall headless versions. If you need to remove an older version of Java, you can try Solution 1 which involves finding the product code first.

How to remove old version of java during silent install?

To remove an older version of Java, follow these instructions.

Start /wait msiexec.exe /x /qn /norestart 

To obtain the product code for an older version of Java, navigate to the regedit path \ \ \ \ \ HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\ \ \ \ and locate the corresponding version.

Regarding my situation with Java 8 Update 31, the 26A24AE4-039D-4CA4-87B4-2F83218031F0 is applicable for the 32-bit version.

To make the necessary adjustment for 64-bit, simply replace the number 32 with 64 in the following code: 2F83218031F0 , which should be updated to 2F86418031F0 .

Refer to the complete post for additional details.

As per the Java website, to activate the feature, one can simply add REMOVEOUTOFDATEJRES=1 and execute the command as follows: java.exe /s REMOVEOUTOFDATEJRES=1.

How to Protect Yourself From Java Security Problems, First, open the Java Control Panel by pressing the Windows key, typing Java, and pressing Enter. (On Windows 8, you’ll need to select the Settings category after typing Java). Click the Security tab and uncheck the Enable Java content in the browser checkbox. This will disable the Java plug-in in all …

How To Uninstall Older Versions Of Java On Windows

This Tutorial Helps to How To Uninstall Older Versions Of Java On Windows 10#UninstallJavaOlderVersion#JavaUninstall#JavaUninstallToolThanks Friends For Watc

Three Ways to Remove or Update Older Versions of

In this tutorial, we show you three ways to remove or update older or multiple versions of Java installed on your computer. Oracle …

How to Uninstall Old Versions of Java on PC

How to uninstall versions of Java openJDK

The versions that are not needed can be deleted by specifying their names.

sudo apt remove openjdk-8-jdk sudo apt remove openjdk-11-jdk 

Various packages have been utilized for their installation.

This command displays a list of all the available packages for openjdk.

sudo apt update apt-cache search openjdk 

To view the complete list of openjdk packages installed on your system, use the following command:

As a RedHat user, I am not well-versed with Mint, but the package names required for those commands to work are pretty much the same on every distribution. I have just verified them on Mint.

Following the given directions, I successfully removed all unnecessary components. In addition, I had to use specific commands to uninstall headless versions separately.

sudo apt remove openjdk-8-jre-headless sudo apt remove openjdk-11-jre-headless 

How to Uninstall Java on Mac OS X, Java is, and always has been, the source of many woes. And security holes. Lots of security holes. There’s really no reason to have it installed anymore, especially now that Minecraft has its own bundled Java for both OS X and Windows. So today is the day you remove it.

Uninstall previous versions of Java before applying new version?

Every application will possess a distinctive GUID or product code that will enable its removal.

There are numerous methods to locate them.

By checking the registry after installing an application, one can obtain the guid and the corresponding uninstall command line that Windows utilizes to delete the application.

The software key for uninstallation in the current version of Windows is located at HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall.

An alternative method is to utilize ORCA software to inspect the Property table within the MSI database.

In case the app has been deployed through ConfigMgr’s application model, you can examine the auto-generated uninstall command line, as long as it’s an msi.

Additionally, you can obtain the necessary information swiftly by utilizing VBScripts and Powershell scripts.

Meet John Marcum, a Microsoft MVP in Enterprise Client Management. He is an author of the System Center Admin blog and can be found on Twitter with the handle @SCCM_Marcum as well as on LinkedIn using his name.

Do I need to uninstall Java runtime environment, No, you can have many JDKs and JREs installed in parallel. Just pay attention to where your PATH environment variable points to what’s the value of the JAVA_HOME environment variable Here’s a cross-platform reference to setting these variables (but beware, some of this may be project-specific, I just couldn’t …

Do I need to uninstall Java runtime environment before installing JDK?

It is possible to install multiple JDKs and JREs simultaneously, but it is important to be careful and mindful.

1. The location pointed to by your PATH environment variable.
2. Can you provide the environmental variable name for the location of Java?

This is a reference for setting variables that works on multiple platforms, but keep in mind that some of it may pertain to specific projects as I was unable to locate a definitive cross-platform document.

The (JAVA_HOME)/jre directory contains JRE, which is included in JDK. Installing JDK eliminates the need for an additional installation of JRE.

Uninstall old version of Java 6 when it doesn’t respond, How do I uninstall the older version of Java 6 and it’s updates when it doesn’t uninstall to the remove command? I get the following message: We have detected the following old versions of Java that are installed on your system:

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