It can be declared inside or outside any non-static class.

It can be declared only inside another class.

An enum type implement java.lang.Comparable interface.

An enum cannot have a constructor.

An enum type extend

java.lang.Enum class.

It can

be instantiated outside the method  where it is defined.

It must extend the enclosing class.

It can

be instantiated only within the method  where it is defined.

It can be accessed without instantiating the outer class.

It does not have access to nonstatic members of the enclosing class.

It must extend the enclosing class.

You must have a reference to an instance of the enclosing class in order to instantiate it.

A nested class is not a member of its enclosing class.

A nested class has access to the members, including private members, of the class in which it is nested.

The scope of a nested class is bounded by the scope of its enclosing class.

A nested class has no access to the private members of the class in which it is nested.

As a member of its enclosing class, a nested class cannot be declared as private.