java.lang

Class Enum<E extends Enum<E>>

java.lang.Object

java.lang.Enum<E>

All Implemented Interfaces:

Comparable<E>

public class Enum<E extends Enum<E>>
extends Object
implements Comparable<E>

Implementation class required to compile enums

Author:

Shai Almog

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	Enum(String name, int ordinal)

Method Summary

Modifier and Type	Method and Description
protected Object	clone()
int	compareTo(E e) Compares this object to the specified object to determine their relative order.
boolean	equals(Object other) Indicates whether some other object is "equal to" this one.
Class<E>	getDeclaringClass()
protected static <T> T[]	getEnumValues(Class<T> class_)
int	hashCode() Returns a hash code value for the object.
String	name()
int	ordinal()
protected static void	setEnumValues(Object[] values, Class c)
String	toString() Returns a string representation of the object.
static <T extends Enum<T>> T	valueOf(Class<T> enumType, String name)

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

Enum

protected Enum(String name,
               int ordinal)

Method Detail

clone

protected Object clone()

Overrides:

clone in class Object

setEnumValues

protected static final void setEnumValues(Object[] values,
                                          Class c)

getEnumValues

protected static final <T> T[] getEnumValues(Class<T> class_)

valueOf

public static <T extends Enum<T>> T valueOf(Class<T> enumType,
                                            String name)

equals

public final boolean equals(Object other)

Description copied from class: Object

Indicates whether some other object is "equal to" this one. The equals method implements an equivalence relation: It is reflexive: for any reference value x, x.equals(x) should return true. It is symmetric: for any reference values x and y, x.equals(y) should return true if and only if y.equals(x) returns true. It is transitive: for any reference values x, y, and z, if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true. It is consistent: for any reference values x and y, multiple invocations of x.equals(y) consistently return true or consistently return false, provided no information used in equals comparisons on the object is modified. For any non-null reference value x, x.equals(null) should return false. The equals method for class Object implements the most discriminating possible equivalence relation on objects; that is, for any reference values x and y, this method returns true if and only if x and y refer to the same object (x==y has the value true).

Overrides:

equals in class Object

hashCode

public final int hashCode()

Description copied from class: Object

Returns a hash code value for the object. This method is supported for the benefit of hashtables such as those provided by java.util.Hashtable. The general contract of hashCode is: Whenever it is invoked on the same object more than once during an execution of a Java application, the hashCode method must consistently return the same integer, provided no information used in equals comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application. If two objects are equal according to the equals(Object) method, then calling the hashCode method on each of the two objects must produce the same integer result. It is not required that if two objects are unequal according to the equals(java.lang.Object) method, then calling the hashCode method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hashtables. As much as is reasonably practical, the hashCode method defined by class Object does return distinct integers for distinct objects. (This is typically implemented by converting the internal address of the object into an integer, but this implementation technique is not required by the JavaTM programming language.)

Overrides:

hashCode in class Object

toString

public String toString()

Description copied from class: Object

Returns a string representation of the object. In general, the toString method returns a string that "textually represents" this object. The result should be a concise but informative representation that is easy for a person to read. It is recommended that all subclasses override this method. The toString method for class Object returns a string consisting of the name of the class of which the object is an instance, the at-sign character `@', and the unsigned hexadecimal representation of the hash code of the object. In other words, this method returns a string equal to the value of: getClass().getName() + '@' + Integer.toHexString(hashCode())

Overrides:

toString in class Object

compareTo

public final int compareTo(E e)

Description copied from interface: Comparable

Compares this object to the specified object to determine their relative order.

Specified by:

compareTo in interface Comparable<E extends Enum<E>>

Parameters:

e - the object to compare to this instance.

Returns:

a negative integer if this instance is less than another; a positive integer if this instance is greater than another; 0 if this instance has the same order as another.

name

public final String name()

ordinal

public final int ordinal()

getDeclaringClass

public final Class<E> getDeclaringClass()