org.apache.commons.lang.enums

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Java Source Code / Java Documentation » Library » Apache common lang » org.apache.commons.lang.enums 
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);
    }
}
@since 2.1
Java Source File NameTypeComment
Broken1Enum.javaClass Broken color enumeration.
Broken1OperationEnum.javaClass Broken Operator enumeration, null class.
Broken2Enum.javaClass Broken color enumeration.
Broken2OperationEnum.javaClass Broken Operator enumeration, getEnumClass() not superclass.
Broken3Enum.javaClass Broken color enumeration.
Broken3OperationEnum.javaClass Broken Operator enumeration, getEnumClass() is Enum.class.
Broken4OperationEnum.javaClass Broken Operator enumeration, getEnumClass() is ValuedEnum.class.
Broken5OperationEnum.javaClass Broken Operator enumeration, getEnumClass() is not an Enum class.
ColorEnum.javaClass Color enumeration.
DummyEnum.javaClass Dummy enumeration - no values.
Enum.javaClass

Abstract superclass for type-safe enums.

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

EnumEqualsTest.javaClass Test cases for the Enum class equals method.
EnumTest.javaClass Test cases for the Enum class.
author:
   Stephen Colebourne
author:
   Gary D.
EnumTestSuite.javaClass Test suite for the Enum package.
EnumUtils.javaClass
EnumUtilsTest.javaClass Test cases for the Enum class.
Extended1Enum.javaClass Base extended enumeration.
Extended2Enum.javaClass Extended enumeration.
Extended3Enum.javaClass Extended enumeration.
Nest.javaClass Color enumeration demonstrating a normal simple nesting case.
NestBroken.javaClass Color enumeration which demonstrates how to break the enum system.

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

NestLinked.javaClass Color enumeration which demonstrates how to define the constants in a different class to the Enum.
NestReferenced.javaClass Color enumeration which demonstrates how to provide a view of the constants in a different class to the Enum.
OperationEnum.javaClass Operator enumeration.
ValuedColorEnum.javaClass Color enumeration.
ValuedEnum.javaClass

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 ==.

ValuedEnumTest.javaClass Test cases for the Enum class.
ValuedLanguageEnum.javaClass Language enumeration.
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