”;
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 −
public abstract class Enum<E extends Enum<E>>
extends Object
implements Comparable<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.
package com.tutorialspoint;
public class EnumDemo {
public static void main(String args[]) {
//print an Enum
System.out.println(Mobile.Motorola);
Mobile mobile = Mobile.Samsung;
//Usage in IF statment
if(mobile == Mobile.Samsung) {
System.out.println("Matched");
}
//Usage in Swith statment
switch(mobile) {
case Samsung:
System.out.println("Samsung");
break;
case Nokia:
System.out.println("Nokia");
break;
case Motorola:
System.out.println("Motorola");
}
}
}
enum Mobile {
Samsung,
Nokia,
Motorola
}
Output
Let us compile and run the above program, this will produce the following result −
Motorola Matched Samsung
”;