Is it possible to get enclosing instance from nested enum?

Question

I have the following class along with a nested enum:

public class MyClass {

    private Integer field;

    private enum SelectedValue{
        ALL {
            @Override
            public Integer getAmount() {
                return field; //Error: field cannot be resolved to a variable
            }
        };


        public abstract Integer getAmount();
    }
}

Is it possible to get enclosing instance within the enum body?

possible duplicate of [In Java, are enum types inside a class static?](http://stackoverflow.com/questions/663834/in-java-are-enum-types-inside-a-class-static) — Brett Okken, Mar 04 '15 at 13:11

Evgeniy Dorofeev · Accepted Answer · 2015-03-04T13:20:45.687

7

Nested enum types are implicitly static, see JLS 8.9. You cannot access a non-static field of enclosing class

edited Mar 04 '15 at 13:20

answered Mar 04 '15 at 13:06

Evgeniy Dorofeev

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Maybe you can provide some normative reference? I mean JLS or something similar... – user3663882 Mar 04 '15 at 13:51
2

It is JLS 8.9 Enum Types – Evgeniy Dorofeev Mar 04 '15 at 13:54

score 3 · Answer 2 · answered Mar 04 '15 at 13:05

3

You can only access field if it is static.

answered Mar 04 '15 at 13:05

henry

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Is it possible to get enclosing instance from nested enum?

2 Answers2