'How to fix "Unable to make protected final java.lang.Class java.lang.ClassLoader.defineClass?

I've started a project using java 16 and I'm getting errors in the project all over the place:

An error has occurred. See error log for more details.
Unable to make protected final java.lang.Class java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) throws java.lang.ClassFormatError accessible: module java.base does not "opens java.lang" to unnamed module @6dfcffb5

It looks like the code I have from different version of java is not working in this particular version. Any idea what I need to change maybe in the pojo class. I have only 1 pojo in the application cause it is micro service.

Thanks.

java


Solution 1:[1]

You can just define the JRE system library by precising the path following the next steps: Project Folder -> Properties -> Java build path -> double clicks on JRE system library and choose your installed JRE, it works for me. And sorry for my bad English

Sources

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Source: Stack Overflow

Solution Source
Solution 1 Youness Hourri

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