Showing posts with label Uninstall JDK. Show all posts

Tuesday, 20 September 2022

How Uninstall JDK Windows 11 or Windows 10 Operating system? | Uninstall JDK

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How to Completely Uninstall JDK from Windows

Whether you're troubleshooting an installation or upgrading to a newer version, knowing how to properly remove the Java Development Kit (JDK) is essential. A clean uninstallation prevents "version mismatch" errors that often frustrate developers. Follow this beginner-friendly guide to clean your Windows 10 or 11 system.

1. Use the Windows Control Panel

The standard way to remove software on Windows is through the Control Panel. This method removes the application files and the registry entries created during installation.

Open the Control Panel and go to Programs and Features.
Scroll through the list to find your Java SE Development Kit.
Right-click the version you want to remove and select Uninstall.
Follow the prompts until the process is complete.

2. Manually Delete Remaining Folders

Sometimes, the uninstaller leaves behind empty folders or configuration files. To be safe, check your installation directory.

Navigate to C:\Program Files\Java. If you still see the folder for the version you just uninstalled, right-click and delete it manually. This ensures a truly "clean" slate.

3. Clean Up Environment Variables

This is where most beginners run into trouble! Even after uninstalling, your system might still be pointing to a path that no longer exists.

Search for "Environment Variables" in the Start Menu.
Check for the JAVA_HOME variable under "System Variables" and delete it.
Edit the Path variable and remove any lines referencing the old JDK bin folder.

4. Verify the Removal

The best way to confirm is by using the Command Prompt. Open a new CMD window and type:

        java -version
    

If you see a message saying 'java' is not recognized, you have successfully and completely removed the JDK! You are now ready for a fresh installation.

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Thursday, 18 June 2015

Java Tutorial : Uninstall JDK (Linux Operating System)

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How to Cleanly Uninstall JDK from Linux

Sometimes you need to clear out old versions of Java to make room for a new update or simply to clean up your system. Removing JDK from Linux might seem intimidating at first, but with a few simple terminal commands, you can ensure a clean uninstallation without leaving any mess behind.

Step 1: Identify Installed Java Versions

Before you delete anything, you need to know what you have. Open your terminal and check the current Java version with java -version. You can also list all installed Java packages using your system's package manager to ensure you target the right version.

Step 2: Use the Package Manager to Remove

If you installed Java using a package manager like APT (for Ubuntu/Debian) or YUM (for RHEL/CentOS), the removal is straightforward. Simply use the remove or purge command followed by the package name. This will handle the binary files and most configuration links automatically.

Step 3: Manually Removing Tarball Installations

If you installed Java manually by extracting a .tar.gz file, you will need to delete the folder manually. Navigate to the directory where you stored the JDK (common locations include /usr/lib/jvm/ or /opt/) and use the rm -rf command on the specific JDK folder.

Step 4: Cleaning Up Environment Variables

After removing the files, don't forget your environment variables! Open your .bashrc, .bash_profile, or /etc/environment file and remove any lines referring to JAVA_HOME or entries in the PATH that point to the deleted JDK directory.

Step 5: Verify Removal

Restart your terminal and type java -version. If the uninstallation was successful, your system should either show another installed version or return a message saying the command was not found. Your system is now clean!

More Helpful Java Guides:

Click here to watch in Youtube :
https://www.youtube.com/watch?v=5gOfLZCW260&list=UUhwKlOVR041tngjerWxVccw

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Java Tutorial : Uninstall JDK (Linux Operating System)

Linux Commands:

#Which java

#java –version

#rpm –qa | grep jdk

#rpm  -e <package_name>

#rpm

Refer External Links:

http://docs.oracle.com/javase/8/docs/technotes/guides/install/linux_jdk.html

http://www.2daygeek.com/uninstall-oracle-java-openjdk-linux/

https://www.java.com/en/download/help/linux_uninstall.xml

Friday, 15 May 2015

Java : Uninstall JDK (Windows operating system)

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Easy Steps to Uninstall JDK from Windows

Whether you're making room for a new version or troubleshooting an old installation, knowing how to properly remove the Java Development Kit (JDK) is essential. This guide ensures a clean uninstallation so you don't run into errors later on.

Step 1: Open the Control Panel

The most reliable way to uninstall software on Windows is through the Control Panel. Search for "Control Panel" in your Windows Start menu and navigate to "Uninstall a program" under the Programs category.

Step 2: Locate Java Development Kit

Scroll through the list of installed programs until you find "Java(TM) SE Development Kit". You might see multiple versions if you have been coding for a while. Right-click the version you want to remove and select "Uninstall".

Step 3: Confirm and Wait

Windows will ask if you're sure you want to remove the software. Click "Yes" and let the installer do its work. Once it finishes, the entry will disappear from your program list.

Step 4: Clean Up Environment Variables

Removing the files isn't always enough! To ensure a completely clean system, go to your System Environment Variables. Look for JAVA_HOME and remove it. Also, check the Path variable and delete any entries that point to the JDK bin folder you just uninstalled.

Step 5: Verify the Removal

Open a fresh Command Prompt window and type java -version. If the uninstallation was successful and you have no other versions, Windows should tell you it doesn't recognize the command. Your system is now clear!