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Java Class class isEnum() method with example

Class class isEnum() method: Here, we are going to learn about the isEnum() method of Class class with its syntax and example.
Submitted by Preeti Jain, on November 02, 2019

Class class isEnum() method

• isEnum() method is available in java.lang package.
• isEnum() method is used to check whether this Class is declared as an enum in the program or not.
• isEnum() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
• isEnum() method does not throw an exception at the time of checking the Class is declared as an enum.

Syntax:

    public boolean isEnum();

Parameter(s):

• It does not accept any parameter.

Return value:

The return type of this method is boolean, it returns a boolean value based on the following cases,

• It returns true, when this Class is declared as an enum in the program.
• It returns false, when this Class is not declared as an enum in the program.

Example:

// Java program to demonstrate the example 
// of boolean isEnum() method of Class 

enum Fruits {
    Apple,
    Orange,
    Banana,
    Grapes,
};

public class IsEnumOfClass {
    public static void main(String[] args) {
        // It returns the Enum constants represented by the 
        // class IsEnumOfClass
        System.out.print("Enum Constants: ");
        System.out.println(Fruits.Apple.toString());

        System.out.print("Enum Constants: ");
        System.out.println(Fruits.Orange.toString());

        System.out.print("Enum Constants: ");
        System.out.println(Fruits.Banana.toString());

        System.out.print("Enum Constants: ");
        System.out.println(Fruits.Grapes.toString());

        // It checks whether this class 
        // denotes an enum declaration or not
        System.out.println("Class declare enum: " + Fruits.class.isEnum());
    }
}

Output

Enum Constants: Apple
Enum Constants: Orange
Enum Constants: Banana
Enum Constants: Grapes
Class declare enum: true