Private members in Enum Java [duplicate]

Question

public class Test {

    public static enum MyEnum {
        valueA(1),valueb(2),valuec(3),valued(4);
        private int i;
        private Object o;

        private MyEnum(int number) {
             i = number;
        }

        public void set(Object o) {
            this.o = o;
        }

        public Object get() {
            return o;
        }


     } 

    public static void main(String[] args) {
        System.out.println(MyEnum.valueA.i); // private
    }
}

output: 1

Why 1 is shown if it a private member in enum?

private means visible to the class only, but this is exactly what you have. — cara
– cara, Commented Mar 9, 2013 at 16:06

Reimeus · Accepted Answer · 2013-03-09 16:40:07Z

5

Outer classes have full access to the member variables of their inner classes, therefore i is visible in the Test class.

In contrast, if MyEnum was external to the Test class, the compiler would complain about the visibility of i,

edited Mar 9, 2013 at 16:40

answered Mar 9, 2013 at 16:03

Reimeus

160k16 gold badges225 silver badges282 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Scorpion · Accepted Answer · 2013-03-09 16:04:17Z

3

It's (i) a member field being referenced within the same class (MyEnum); no access modifier prevents that - the private access modifier defined on i will prevent it's visibility outside this class. Suggested Reading

answered Mar 9, 2013 at 16:04

Scorpion

3,98627 silver badges39 bronze badges

Comments

Community · Accepted Answer · 2017-05-23 11:50:47Z

1

private access from a containing type to a nested type is permitted, see Why are private fields on an enum type visible to the containing class?

edited May 23, 2017 at 11:50

CommunityBot

11 silver badge

answered Mar 9, 2013 at 16:13

hflzh

6545 silver badges12 bronze badges

Comments

Youans · Accepted Answer · 2013-03-09 16:09:07Z

0

vlaueA is considered a static variable so you can call it within MyEnum since i in the same enum whice play the same as a class so MyEnum can access valueA which can access i

answered Mar 9, 2013 at 16:09

Youans

5,1512 gold badges36 silver badges61 bronze badges

Comments

AmitG · Accepted Answer · 2013-03-09 16:13:19Z

0

Outer class will have the access to inner class member even if it is private because you have defined main method inside the outer class.

answered Mar 9, 2013 at 16:13

AmitG

10.6k5 gold badges33 silver badges55 bronze badges

Collectives™ on Stack Overflow

Private members in Enum Java [duplicate]

5 Answers 5

Comments

Comments

Comments

Comments

Comments

Linked

Hot Network Questions

Collectives™ on Stack Overflow

5 Answers 5

Comments

Comments

Comments

Comments

Comments

Linked

Related