java: Error: Invalid source release: 16

This answer part references GPT, GPT_Pro better problem solving
Java language errors: invalid source distribution: 16 How to Fix this problem

This is a common Java error, mainly caused by incompatible versions of Java. The solution can be divided into the following points:

1. Check whether the Java version currently installed is correct. If you are currently using Java 8 and Java 11 is specified in your code, this error will occur. Check whether the version specified in the code is consistent with the version currently in use, or change the version specified in the code to the version currently in use.

2. Updates the Java version. If you are currently using an older version of Java and you specify a new version of Java in your code, you can try to update the current version of Java to the new version specified in your code.

3. Close the agent. If you are using a proxy to access the Internet, there may be problems with the proxy. Turning the proxy off can solve the problem.

4. Try to reinstall the JDK. Reinstalling the JDK solves a lot of problems. If none of the above three fixes the problem, you can try reinstalling the JDK.

In summary, to resolve Java errors such as "invalid source distribution: 16", we can resolve such problems by checking the currently installed Java version, updating the Java version, closing the agent, or re-installing the JDK.
If the answer is helpful, please accept it.