Java Enum clone() Method

The clone() method of Enum class throws CloneNotSupportedException. This method ensures that enums cannot be cloned, which helps to maintain their "singleton" property.

Syntax

Override

The clone() method of Enum class overrides the clone() method of class Object.

Return Value

The clone() method doesn't returns anything.

Throws

The clone() method throws CloneNotSupportedException if the object's class does not support the Cloneable interface. Subclasses that overriding this method can also throw CloneNotSupportedException exception to show that an instance cannot be cloned.

Example 1

import java.lang.*;

enum Colour{
Red,Pink,Black,Blue,White,red;
}
public class Enum_cloneMethodExample1 {
    String Red;

public static void main(String[] args) {
        Enum_cloneMethodExample1 enu = new Enum_cloneMethodExample1() {
protected final Object clone() throws CloneNotSupportedException {
throw new CloneNotSupportedException();
            }
        };
        Colour col = Colour.Red;

switch (col) {
case Red:
System.out.println("People with Red as their favourite colour are generally wiser.");
break;
case Blue:
System.out.println("People with Blue as their favourite colour are ambitious in life.");
break;
case Black:
System.out.println("People with Black as their favourite colour are soft hearted and are head strong.");
break;
case White:
System.out.println("Peoples with White as their favourite colour are benevolent and loving .");
break;
case Pink:
System.out.println("Peoples with Pink as their favourite colour are beautiful and intelligent.");
break;
        }
        }
        }

Test it Now

Output:

People with Red as their favourite colour are generally wiser.

Example 2

import java.lang.*;

enum Vehicle{

MarutiI(2010), MarutiII(2013),MarutiIII(2016);

int model;

Vehicle(int m) {
model  = m;

    }

int showModel() {
return model;

    }
}

public class Enum_cloneMethodExample2 {

public static void main(String[] args) {

System.out.println("Maruti Car models till yet:");

//Enums can never be cloned...

Object t = new Enum_cloneMethodExample2() {

protected final Object clone() throws CloneNotSupportedException {

throw new CloneNotSupportedException();
            }

        };

for(Vehicle m : Vehicle.values()) {

System.out.println(m + " launched in " + m.showModel() + " year.");

        }
    }
}

Test it Now

Output:

Maruti Car models till yet:
MarutiI launched in 2010 year.
MarutiII launched in 2013 year.
MarutiIII launched in 2016 year.

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Java Enum Class