public abstract class Enum extends 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(String name)
Constructor to add a new named item.
|
protected |
Enum(String name,
Map map)
Constructor to add a new named item.
|
Modifier and Type | Method and Description |
---|---|
boolean |
equals(Object o)
Tests for equality.
|
String |
getName()
Retrieve the name of this Enum item, set in the constructor.
|
int |
hashCode() |
String |
toString()
Human readable description of this Enum item.
|
protected Enum(String name)
Note: access changed from public
to
protected
after 4.0. See class description.
name
- Name of the item.public boolean equals(Object o)
public final String getName()
String
of this Enum itemCopyright © 2023. All rights reserved.