How to access enum if inner enum having same name exist

Question

Unable to access values from enum defined outside class Test.

How to access enumeration constant like Reddel,Jonathan,Goldendel etc

enum Apple{
    Reddel,Jonathan,Goldendel,Winesap,Cortland;
}


public class Test{
    enum Apple{
        Seb,Majj,Dlred,Wipe,Cland;
    }
    public static void main(String s[]){
        //here I want to access enumeration constant from Apple outside Test.
        //Apple.Winesap
        //Apple.Goldendel
        System.out.println(Apple.Winesap);

    }
}

what should append before `Apple.Winesap`,since this is in same package. — , May 26 '15 at 10:14
@EJP situatione arise like that, since i have to use method like `comapereTo` which is only applicable if both of same type. — , May 26 '15 at 10:27

score 3 · Accepted Answer · edited May 23 '17 at 11:43

3

If you have your classes in a package, say

package pkg;

then using pkg.Apple.Winesap will work. (The fully qualified name of the other Apple is pkg.Test.Apple.)

You can also statically import the members from pkg.Apple:

import static pkg.Apple.*;

and then use Winesap.

If you're using the default package (no package declaration) then the inner Apple shadows the other Apple and you're out of luck. (Same goes for static imports; You can't statically import a member from a class in the default package.)

Related questions:

edited May 23 '17 at 11:43

Community

1
1

answered May 26 '15 at 10:16

aioobe

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these are in default package,nothing to append – May 26 '15 at 10:19
Then you're out of luck I'm afraid, as stated in my last paragraph. – aioobe May 26 '15 at 10:20

score 0 · Answer 2 · answered May 26 '15 at 10:16

0

The package name should be appended.

answered May 26 '15 at 10:16

Zefick

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In this case the outer `Apple` lives in the default package, i.e. no package declaration. – aioobe May 26 '15 at 10:25
Using the default package is a bad style which leads to such problems. Don't do this. – Zefick May 26 '15 at 10:27

score 0 · Answer 3 · answered May 26 '15 at 10:20

You need to specify the full package path. The below code I tested is compiling:

package com.my.test;

enum Apple{
    Reddel,Jonathan,Goldendel,Winesap,Cortland;
}

public class Test{
    enum Apple{
        Seb,Majj,Dlred,Wipe,Cland;
    }
    public static void main(String s[]){
        //here I want to access enumeration constant from Apple outside Test.
        //Apple.Winesap
        //Apple.Goldendel
        System.out.println(com.my.test.Apple.Winesap);
        }
    }

In this case the outer `Apple` lives in the default package, i.e. no package declaration. — aioobe, May 26 '15 at 10:24

score 0 · Answer 4 · answered May 26 '15 at 10:20

0

The enum is declared somewhere, imagine in ClassName.java. You can refer them separately with ClassName.Apple.Reddel and Test.Apple.Seb

answered May 26 '15 at 10:20

Jordi Castilla

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But the outer `Apple` does not live in a `Test` class, so I don't see how this is possible. – aioobe May 26 '15 at 10:25
in which class is outer `Apple` declared? – Jordi Castilla May 26 '15 at 10:26
It's a top-level class, so it's not declared *in* any class. – aioobe May 26 '15 at 10:26
1

so you can't refer to outer enum if you don't change the name – Jordi Castilla May 26 '15 at 10:29

How to access enum if inner enum having same name exist

4 Answers4