protected Enum(String name,
    int ordinal) 
{
        this.name = name;
        this.ordinal = ordinal;
}

Sole constructor. Programmers cannot invoke this constructor. It is for use by code emitted by the compiler in response to enum type declarations.

Parameters:

name - - The name of this enum constant, which is the identifier used to declare it.

ordinal - - The ordinal of this enumeration constant (its position in the enum declaration, where the initial constant is assigned an ordinal of zero).

 protected final Object clone() throws CloneNotSupportedException 
{
        throw new CloneNotSupportedException();
}

Throws CloneNotSupportedException. This guarantees that enums are never cloned, which is necessary to preserve their "singleton" status.

 public final int compareTo(E o) 
{
        Enum other = (Enum)o;
        Enum self = this;
        if (self.getClass() != other.getClass() && // optimization
            self.getDeclaringClass() != other.getDeclaringClass())
            throw new ClassCastException();
        return self.ordinal - other.ordinal;
}

Compares this enum with the specified object for order. Returns a negative integer, zero, or a positive integer as this object is less than, equal to, or greater than the specified object. Enum constants are only comparable to other enum constants of the same enum type. The natural order implemented by this method is the order in which the constants are declared.

 public final boolean equals(Object other) 
{
        return this==other;
}

Returns true if the specified object is equal to this enum constant.

 protected final  void finalize() 
{

}

enum classes cannot have finalize methods.

 public final Class<E> getDeclaringClass() 
{
        Class clazz = getClass();
        Class zuper = clazz.getSuperclass();
        return (zuper == Enum.class) ? clazz : zuper;
}

Returns the Class object corresponding to this enum constant's enum type. Two enum constants e1 and e2 are of the same enum type if and only if e1.getDeclaringClass() == e2.getDeclaringClass(). (The value returned by this method may differ from the one returned by the Object#getClass method for enum constants with constant-specific class bodies.)

 public final int hashCode() 
{
        return super.hashCode();
}

Returns a hash code for this enum constant.

 public final String name() 
{
        return name;
}

Returns the name of this enum constant, exactly as declared in its enum declaration. Most programmers should use the #toString method in preference to this one, as the toString method may return a more user-friendly name. This method is designed primarily for use in specialized situations where correctness depends on getting the exact name, which will not vary from release to release.

 public final int ordinal() 
{
        return ordinal;
}

Returns the ordinal of this enumeration constant (its position in its enum declaration, where the initial constant is assigned an ordinal of zero). Most programmers will have no use for this method. It is designed for use by sophisticated enum-based data structures, such as java.util.EnumSet and java.util.EnumMap .

 public String toString() 
{
        return name;
}

Returns the name of this enum constant, as contained in the declaration. This method may be overridden, though it typically isn't necessary or desirable. An enum type should override this method when a more "programmer-friendly" string form exists.

 public static T valueOf(Class<T> enumType,
    String name) 
{
        T result = enumType.enumConstantDirectory().get(name);
        if (result != null)
            return result;
        if (name == null)
            throw new NullPointerException("Name is null");
        throw new IllegalArgumentException(
            "No enum constant " + enumType.getCanonicalName() + "." + name);
}

Returns the enum constant of the specified enum type with the specified name. The name must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Note that for a particular enum type {@code T}, the implicitly declared {@code public static T valueOf(String)} method on that enum may be used instead of this method to map from a name to the corresponding enum constant. All the constants of an enum type can be obtained by calling the implicit {@code public static T[] values()} method of that type.