CODEWITHSUNDEEP
javaenums
rents
rents

Reputation: 848

Can you explain the output of this java program using enum?

class Ideone
{
    enum Members{
        A(1),B(2),C(3);  // I have 3 enum constants here
        private int size;
        Members(int size){
            //System.out.println("Initializing var with size = "+size);
        }
    }
    public static void main (String[] args) throws java.lang.Exception
    {
        System.out.print("main ");
        // your code goes here
        for (Members i: Members.values()){
            System.out.print(i.name());
            System.out.println(i.size);
        }       
    }
}

Here goes the Output of the program-

main A 0
B 0
C 0

Why is the size value not printed as 1, 2 and 3 instead of 0?

Upvotes: 0

Views: 56

Answers (1)

home
home

Reputation: 12538

Because you did not map the size attribute. Change the enum constructor to:

Members(int size){
    this.size = size;
}

Btw: you should always mark enum fields as final as enums just exist once (singletons). So change private int size to private final int size

Upvotes: 4

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