- Java.lang Package classes
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- Java.lang - ThreadLocal
- Java.lang - Throwable
- Java.lang - Void
- Java.lang Package extras
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- Java.lang Package Useful Resources
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Java.lang.Enum.clone() Method
Description
The java.lang.Enum.clone() method guarantees that enums are never cloned, which is necessary to preserve their "singleton" status.
Declaration
Following is the declaration for java.lang.Enum.clone() method
protected final Object clone() throws CloneNotSupportedException
Parameters
NA
Return Value
This method does not return any value.
Exception
CloneNotSupportedException − if the object's class does not support the Cloneable interface. Subclasses that override the clone method can also throw this exception to indicate that an instance cannot be cloned.
Example
The following example shows the usage of java.lang.Enum.clone() method.
package com.tutorialspoint; import java.lang.*; // enum showing Mobile prices enum Mobile { Samsung(400), Nokia(250); int price; Mobile(int p) { price = p; } int showPrice() { return price; } } public class EnumDemo { public static void main(String args[]) { System.out.println("Enums can never be cloned..."); EnumDemo t = new EnumDemo() { protected final Object clone() throws CloneNotSupportedException { throw new CloneNotSupportedException(); } }; System.out.println("CellPhone List:"); for(Mobile m : Mobile.values()) { System.out.println(m + " costs " + m.showPrice() + " dollars"); } } }
Let us compile and run the above program, this will produce the following result −
Enums can never be cloned... CellPhone List: Samsung costs 400 dollars Nokia costs 250 dollars
java_lang_enum.htm
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