org.apache.commons.lang.enums

Provides an implementation of the C style enum in the Java world.

The classic example being an RGB color enumeration.

public final class ColorEnum extends Enum {
    public static final ColorEnum RED = new ColorEnum("Red");
    public static final ColorEnum GREEN = new ColorEnum("Green");
    public static final ColorEnum BLUE = new ColorEnum("Blue");

    private ColorEnum(String color) {
        super(color);
    }

    public static ColorEnum getEnum(String color) {
        return (ColorEnum) getEnum(ColorEnum.class, color);
    }

    public static Map getEnumMap() {
        return getEnumMap(ColorEnum.class);
    }

    public static List getEnumList() {
        return getEnumList(ColorEnum.class);
    }

    public static Iterator iterator() {
        return iterator(ColorEnum.class);
    }
}

Abstract superclass for type-safe enums.

One feature of the C programming language lacking in Java is enumerations.

The class loader sees the two classes here as independent - the enum class is nested, not an inner class.

Abstract superclass for type-safe enums with integer values suitable for use in switch statements.

NOTE:Due to the way in which Java ClassLoaders work, comparing Enum objects should always be done using the equals() method, not ==.