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Introduction
The java.lang.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
| S.N. |
Constructor & Description |
| 1 |
protected Enum(String name, int ordinal)
This is the single constructor. |
Class methods
| S.N. |
Method & Description |
| 1 |
protected Object clone()
This method throws CloneNotSupportedException.
|
| 2 |
int compareTo(E o)
This method compares this enum with the specified object for order.
|
| 3 |
boolean equals(Object other)
This method returns true if the specified object is equal to this enum constant.
|
| 4 |
protected void finalize()
This method returns enum classes cannot have finalize methods.
|
| 5 |
Class<E> getDeclaringClass()
This method returns the Class object corresponding to this enum constant's enum type.
|
| 6 |
int hashCode()
This method returns a hash code for this enum constant.
|
| 7 |
String name()
This method returns the name of this enum constant, exactly as declared in its enum declaration.
|
| 8 |
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).
|
| 9 |
String toString()
This method returns the name of this enum constant, as contained in the declaration.
|
| 10 |
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:
package com.cv.java.enums;
/**
* @author Chandra Vardhan
*
*/
public enum Companies {
EBAY(30), PAYPAL(10), GOOGLE(20);
private int value;
private Companies(int value) {
this.value = value;
}
public int getValue() {
return value;
}
} |
/**
*
*/
package com.cv.java.enums;
/**
* @author Chandra Vardhan
*
*/
public enum Day {
SUNDAY, MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY, SATURDAY
} |
package com.cv.java.enums;
public class EnumDayTest {
public static void main(String[] args) {
Day day = Day.MONDAY;
switch (day) {
case SUNDAY:
System.out.println("sunday");
break;
case MONDAY:
System.out.println("monday");
break;
default:
System.out.println("other day");
}
}
} |
package com.cv.java.enums;
/**
* @author Chandra Vardhan
*
*/
public class EnumExample {
private Company cName;
public enum Company {
EBAY, YAHOO, GOOGLE
}
public EnumExample(Company cName) {
this.cName = cName;
}
public void companyDetails() {
switch (cName) {
case EBAY:
System.out.println("Biggest Market Place in the World.");
break;
case GOOGLE:
System.out.println("Google - biggest search giant.. ATT - my carrier provider..");
break;
default:
System.out.println("Simplest way to manage Money.");
break;
}
}
public static void main(String[] args) {
EnumExample ebay = new EnumExample(Company.EBAY);
ebay.companyDetails();
EnumExample paypal = new EnumExample(Company.GOOGLE);
paypal.companyDetails();
}
} |
package com.cv.java.enums;
public class EnumTest {
public static void main(String[] args) {
for (Companies company : Companies.values()) {
System.out.println("Company Value: " + company.getValue() + " - Comapny Name: " + company);
}
}
} |
package com.cv.java.enums;
public class EnumVlauesMethod {
public enum Company {
EBAY(30), PAYPAL(10), GOOGLE(20);
private int value;
private Company(int value) {
this.value = value;
}
}
public static void main(String[] args) {
for (Company company : Company.values()) {
System.out.println("Company Value: " + company.value + " - Comapny Name: " + company);
}
}
} |
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