Resolving Java Issues After Upgrading to Big Sur on Mac OS

Discover how to fix Java issues that arise after upgrading to Mac OS `Big Sur`. Follow this comprehensive guide for troubleshooting and setting up your environment. --- This video is based on the question https://stackoverflow.com/q/64875451/ asked by the user 'Rollsbean' ( https://stackoverflow.com/u/8230537/ ) and on the answer https://stackoverflow.com/a/64886141/ provided by the user 'Rollsbean' ( https://stackoverflow.com/u/8230537/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions. Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Java works not well after upgrage Mac OS to Big Sur(v11.0.1) Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l... The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license. If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com. --- Resolving Java Issues After Upgrading to Big Sur on Mac OS Upgrading your operating system can bring many enhancements, but it can also lead to unexpected complications, especially for developers. One common issue faced by Java developers after upgrading to Mac OS Big Sur (version 11.0.1) is the failure of their Java applications to compile correctly. In this post, we will explore a specific problem that arises after the upgrade and walk through the steps to resolve it. Let's dive in! The Problem After upgrading from an earlier version of Mac OS, many users noticed issues running Java tasks using Maven. Specifically, an error is thrown during the mvn clean package command: [[See Video to Reveal this Text or Code Snippet]] The root of the issue appears to stem from the JAVA_HOME environment variable, which points to a Java installation path that doesn't exist after the upgrade. Understanding the Cause When you run the command which java, it provides the path to the active Java executable. Here's what happens: Prior to the upgrade, the output of which java correctly pointed to your JDK installation: [[See Video to Reveal this Text or Code Snippet]] After upgrading to Big Sur, the command now points to: [[See Video to Reveal this Text or Code Snippet]] This location does not correspond to a full Java Development Kit (JDK), leading to errors. The main problem arises due to the line in your ~/.bash_profile: [[See Video to Reveal this Text or Code Snippet]] After the upgrade, $(/usr/libexec/java_home) updated to point to the missing link, causing compilation failures. Solution Steps Step 1: Verify Your JDK Installation Before changing environment variables, verify that your desired version of the JDK is installed on your Mac. You can do this by checking the directory: [[See Video to Reveal this Text or Code Snippet]] If your required JDK version is missing, you may need to reinstall it. Step 2: Reinstall JDK if Necessary Delete the existing JDK: Go to the above directory and remove any broken JDK installations that may have been left after the upgrade. Download and Install JDK 8: Head over to the official Oracle website to get the latest version of JDK 8 or your preferred version. Step 3: Update .bash_profile Instead of using the dynamic command for JAVA_HOME, set it directly to your JDK path: [[See Video to Reveal this Text or Code Snippet]] This ensures that your environment points directly to a valid JDK. Step 4: Refresh Terminal Configuration After making changes to your .bash_profile, make sure to update your current terminal session: [[See Video to Reveal this Text or Code Snippet]] Final Step: Test Check your Java version to verify if the changes have taken effect: [[See Video to Reveal this Text or Code Snippet]] Your output should now reflect the correct version of the JDK. Conclusion If you encounter Java issues after upgrading to Mac OS Big Sur, this guide should help you troubleshoot and resolve the problem effectively. Whenever you update your operating system, don't forget to check that your development environment remains intact! Remember, keeping your JDK version correctly configured in your environment variables is crucial for smooth development. By following the steps outlined, you can avoid the frustrations that come with such upgrades in the future. If you have any further questions or encounter issues, feel free to reach out in the comments!