Re: Netbeans 12.1: Cannot access java.lang?

[Peter Hull]

I would check:
1. Does your Java platform setup look reasonable? (in Tools | Java
Platforms )
2. Does this error occur for a new project or just existing ones? (e.g. set
up a new "Java with Ant" application)
I think I've seen something like this before and it was down to the Java
platform configuration.