CODEWITHSUNDEEP
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huahsin68
huahsin68

Reputation: 6979

why enum could not be resolved in JAVA?

I was using J2EE Eclipse Indigo, and I have three class declare like this:

public interface ClassA {
   public static enum TYPE { TYPE1, TYPE2 };
}

public interface ClassB extends ClassA {

}

public class ClassC implements ClassB {
   System.out.println(TYPE.TYPE1);
}

There was a compilation error on TYPE in ClassC. It complain that "enum cannot be resolved to a type". And also a warning for enum in ClassA, it complain that:

Multiple markers at this line
 - 'enum' should not be used as an identifier, since it is a reserved keyword from source level 1.5 on
 - enum cannot be resolved to a type
 - Syntax error, insert ";" to complete FieldDeclaration

May I know what cause the error in this code?

Upvotes: 2

Views: 22972

Answers (4)

AlexR
AlexR

Reputation: 115328

You must write code either in a method or in a static block (assigning static values). Your System.out.println() is written into a class. Create method and put System.out.println() there.

Upvotes: 0

stuhpa
stuhpa

Reputation: 306

I had a similar problem:

enum can't be resolved to a type

Eclipse offered to import Enum instead.

I went to

  • Preferences->Java->Installed_JREs->Execution_environment;
  • Selected JavaSE-1.6 in "Execution Environments" pane; and
  • Checked jre6 in Compatible JREs pane.

After rebuild enum was recognized properly.

Upvotes: 10

Bozho
Bozho

Reputation: 597046

  • the first compiles fine. Check your compiler level (should be at least 1.5)
  • inteRface
  • you cannot put code in the method body, as you did in ClassC. It should be in a method or in a block

Upvotes: 6

Roland Illig
Roland Illig

Reputation: 41617

You mistyped inteface for interface.

Maybe your compiler is too old, so that it doesn't know that enum is a keyword.

Upvotes: 0

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