How to get value of enum in Java?

In Java, an enum type is a special data type that allows a variable to be a set of predefined constants. Each value in an enum is known as an enum constant, and these constants are used to represent a fixed set of values. Enumerations are often used to define a collection of related constants, such as the days of the week or the months of the year.

One common task when working with enum types is retrieving the value of an enum constant. In this article, we will explore various methods to obtain the value of an enum in Java.

The Answer: How to Get Value of Enum in Java?

The value of an enum constant in Java can be obtained using the name() method. The name() method returns the name of the enum constant as a string. To retrieve the value, simply call the name() method on the enum constant.

Here’s an example:

“`java
enum Day {
MONDAY(“Monday”),
TUESDAY(“Tuesday”),
WEDNESDAY(“Wednesday”),
THURSDAY(“Thursday”),
FRIDAY(“Friday”),
SATURDAY(“Saturday”),
SUNDAY(“Sunday”);

private String value;

Day(String value) {
this.value = value;
}

public String getValue() {
return value;
}
}

public class EnumExample {
public static void main(String[] args) {
Day day = Day.MONDAY;
String value = day.name();
System.out.println(“Value: ” + value);
}
}
“`

In this example, the name() method is called on the Day.MONDAY enum constant, and the string value “MONDAY” is obtained.

Frequently Asked Questions

Q1: How do I get the value of an enum in Java?

A1: You can get the value of an enum in Java by using the name() method.

Q2: Can I use the toString() method to get the value of an enum?

A2: Yes, the toString() method can also be used to get the value of an enum, as it calls the name() method internally.

Q3: How can I get the value assigned to an enum constant?

A3: To get the value assigned to an enum constant, you can define a getter method inside the enum class, as shown in the example above with the getValue() method.

Q4: Is it possible to obtain the value of an enum constant without calling the name() method?

A4: No, calling the name() method is the standard way to retrieve the value of an enum constant in Java.

Q5: Can I override the name() method in my enum class?

A5: No, the name() method is defined in the Enum class and cannot be overridden.

Q6: How can I retrieve the name of an enum constant as upper case?

A6: You can use the name() method to get the name of an enum constant in its original case. To convert it to upper case, you can use the toUpperCase() method.

Q7: Can I get the ordinal value of an enum constant?

A7: Yes, you can retrieve the ordinal value of an enum constant using the ordinal() method.

Q8: How can I obtain the enum constant by its value?

A8: To obtain an enum constant by its value, you can define a static method inside the enum class that iterates over the enum constants and returns the matching one based on the provided value.

Q9: How can I compare the values of two enum constants?

A9: You can compare the values of two enum constants using the equals() method, as enum constants are objects.

Q10: Can I use a switch statement with enum constants?

A10: Yes, you can use a switch statement with enum constants. The switch case statements can be matched against the enum constants, and the corresponding code block will be executed.

Q11: Can I pass an enum constant as a method parameter?

A11: Yes, you can pass an enum constant as a method parameter in Java.

Q12: How can I retrieve all the values of an enum?

A12: To retrieve all the values of an enum, you can use the values() method, which returns an array containing all the enum constants.

In conclusion, getting the value of an enum in Java can be done easily using the name() method. Enumerations provide a convenient way to represent a fixed set of values, and understanding how to retrieve their values is fundamental when working with enum types.

Dive into the world of luxury with this video!