java.lang.Enum
. Since java doesn't allow multiple inheritance, enum types can't have superclass. They can't even extend from java.lang.Enum
, nor java.lang.Object
. It also means enum A can't inherit or extend enum B.For example, the following is an invalid enum declaration:
public enum MyType extends Object {
ONE, TWO
}
Compiler error:MyType.java:3: '{' expected
public enum MyType extends Object {
MyType.java:6: expected
2 errors
The correct form should be:public enum MyType {
ONE, TWO
}
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