Java – Enum class

Introduction

The Java Enum class is the common base class of all Java language enumeration types.

Class Declaration

Following is the declaration for java.lang.Enum class −

publicabstractclassEnum<E extends Enum<E>>extendsObjectimplementsComparable<E>,Serializable

Class constructors

Sr.No.	Constructor & Description
1	protected Enum(String name, int ordinal)This is the single constructor.

Class methods

Sr.No.	Method & Description
1	int compareTo(E o)This method compares this enum with the specified object for order.
2	boolean equals(Object other)This method returns true if the specified object is equal to this enum constant.
3	Class<E> getDeclaringClass()This method returns the Class object corresponding to this enum constant’s enum type.
4	int hashCode()This method returns a hash code for this enum constant.
5	String name()This method returns the name of this enum constant, exactly as declared in its enum declaration.
6	int ordinal()This method returns the ordinal of this enumeration constant (its position in its enum declaration, where the initial constant is assigned an ordinal of zero).
7	String toString()This method returns the name of this enum constant, as contained in the declaration.
8	static <T extends Enum<T>> T valueOf(Class<T> enumType, String name)This method returns the enum constant of the specified enum type with the specified name.

Methods inherited

This class inherits methods from the following classes −

• java.lang.Object

Example

Following example showcases the usage of enum in if and switch statements.

packagecom.tutorialspoint;publicclassEnumDemo{publicstaticvoidmain(String args[]){//print an EnumSystem.out.println(Mobile.Motorola);Mobile mobile =Mobile.Samsung;//Usage in IF statmentif(mobile ==Mobile.Samsung){System.out.println("Matched");}//Usage in Swith statmentswitch(mobile){caseSamsung:System.out.println("Samsung");break;caseNokia:System.out.println("Nokia");break;caseMotorola:System.out.println("Motorola");}}}enumMobile{Samsung,Nokia,Motorola}

Output

Let us compile and run the above program, this will produce the following result −

Motorola
Matched
Samsung