Return String from enum

Question

I want to use this enum structure in order to return string.

public enum Exchanges {

    PROCESSING("processing");

    private final String type;

    Exchanges(final String type) {
        this.type = type;
    }

    public String getType() {
        return type;
    }

    @Override
    public String toString() {
        return type;
    }
}

When I use Exchanges.PROCESSING I get error:

Syntax error, insert "VariableDeclarators" to complete 
 LocalVariableDeclaration

How I can fix this issue?

`Exchanges e = Exchanges.PROCESSING` should work fine. Please show your code. — assylias, Jun 14 '18 at 10:07
Yes, but I want to use the code in case like this: `channel.exchangeDeclare(Exchanges.PROCESSING, BuiltinExchangeType.TOPIC);` — Peter Penzov, Jun 14 '18 at 10:08
Please show use the code relative to `channel.exchangeDeclare` — Lorelorelore, Jun 14 '18 at 10:08
channel.exchangeDeclare(String exchange , BuiltinExchangeType obj) — Peter Penzov, Jun 14 '18 at 10:11
Possible duplicate of [Using Enum values as String literals](https://stackoverflow.com/questions/6667243/using-enum-values-as-string-literals) — Ben, Jun 14 '18 at 10:16
Tagged it as a duplicate because seemingly that is exactly what the OP wants to do and the dupe target shows several ways of achieving it. — Ben, Jun 14 '18 at 10:17

score 3 · Answer 1 · answered Jun 14 '18 at 10:13

3

channel.exchangeDeclare(String exchange , BuiltinExchangeType obj)

should be

channel.exchangeDeclare(Exchanges exchange , BuiltinExchangeType obj)

or you should change the method call

channel.exchangeDeclare(Exchanges.PROCESSING, BuiltinExchangeType.TOPIC);

to

channel.exchangeDeclare(Exchanges.PROCESSING.getType(), BuiltinExchangeType.TOPIC);

answered Jun 14 '18 at 10:13

Lorelorelore

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Thanks but is there a way to call just `Exchanges.PROCESSING` without `getType()` – Peter Penzov Jun 14 '18 at 10:15
Well surely there is. And it returns you an object of type `Exchanges`. Which is not a `String`. – Ben Jun 14 '18 at 10:15
Then don't use an enum. Because that's not how an enum works. – Ben Jun 14 '18 at 10:16
Yes. As @Ben said, maybe you want to use constants, not enums. – Lorelorelore Jun 14 '18 at 10:16

Return String from enum

1 Answers1