public abstract class Enum
extends java.lang.Object
import org.apache.avalon.framework.Enum;
public final class Color extends Enum {
public static final Color RED = new Color( "Red" );
public static final Color GREEN = new Color( "Green" );
public static final Color BLUE = new Color( "Blue" );
private Color( final String color )
{
super( color );
}
}
If further operations, such as iterating over all items, are required, the
Enum(String, Map) constructor can be used to populate a Map, from which
further functionality can be derived:
public final class Color extends Enum {
static final Map map = new HashMap();
public static final Color RED = new Color( "Red", map );
public static final Color GREEN = new Color( "Green", map );
public static final Color BLUE = new Color( "Blue", map );
private Color( final String color, final Map map )
{
super( color, map );
}
public static Iterator iterator()
{
return map.values().iterator();
}
}
NOTE: between 4.0 and 4.1, the constructors' access has been changed
from public to protected. This is to prevent users
of the Enum breaking type-safety by defining new Enum items. All Enum items
should be defined in the Enum class, as shown above.
| Modifier | Constructor and Description |
|---|---|
protected |
Enum(java.lang.String name)
Constructor to add a new named item.
|
protected |
Enum(java.lang.String name,
java.util.Map map)
Constructor to add a new named item.
|
protected Enum(java.lang.String name)
Note: access changed from public to
protected after 4.0. See class description.
name - Name of the item.protected Enum(java.lang.String name,
java.util.Map map)
Note: access changed from public to
protected after 4.0. See class description.
name - Name of the item.map - A Map, to which will be added a pointer to the newly constructed
object.public final boolean equals(java.lang.Object o)
equals in class java.lang.Objecto - the other objectpublic int hashCode()
hashCode in class java.lang.Objectpublic final java.lang.String getName()
String of this Enum itempublic java.lang.String toString()
toString in class java.lang.Objecttype[name], eg.:
Color[Red].