Java compilation error: open enumeration

I encountered a very strange mistake and I couldn't figure out how to solve it

Projects compiled well on Windows cannot be compiled on Linux, but the following errors occur:

Cannot switch on a value of type AClass.Bbb. Only convertible int values,strings or enum variables are permitted

, even if the type is an enumeration

The code of the class is as follows:

public class AClass {
    private enum Bbb {
        ONE,TWO;
    }
    public void aMethod(List<Bbb> arg) {
        for (Bbb en : arg) {
            switch (en) {
                ....
            }
        }
    }
}

EN in the switch (EN) is underlined with the above error notification

Does anyone else have it? Is there a way to solve this problem?

UPD java version:

java version "1.7.0_25"
Java(TM) SE Runtime Environment (build 1.7.0_25-b15)
Java HotSpot(TM) 64-Bit Server VM (build 23.25-b01,mixed mode)

Solution

If you use jdk1 7. The problem should disappear Please follow the steps below to view the

>Open Project Properties > click "java compiler" > check mark "enable project specific settings" > set all drop-down menus to 1.7 > click OK > clean project to trigger reconstruction

If you are below, the problem will arise again

>Open Project Properties > Click java compiler > clear enable project specific settings > click OK > clean up the project to trigger the rebuild (it will rebuild automatically)

If I do the following, this is what I see

>Open Project Properties > Click java compiler > click Configure workspace Settings > I see compiler compliance level = 1.7 > I see use default compliance settings selected

Hope this can help!!