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Text lesson

clone()

Example

Generate a duplicate of a list.

import java.util.LinkedList;

public class Main {

public static void main(String[] args) {

LinkedList<String> cars = new LinkedList<String>();

cars.add("Volvo");

cars.add("BMW");

cars.add("Ford");

cars.add("Mazda");

LinkedList cars2 = (LinkedList)cars.clone();

cars2.set(0, "Toyota");

System.out.println(cars);

System.out.println(cars2);

}

Definition and Usage

The clone() method yields a copy of the LinkedList as an Object.

This produces a “shallow” copy, implying that object copies within the list are not generated; instead, the list contains references to the same objects as the original list.

Note: Since the return type is Object, it needs to be typecasted to use it as a LinkedList, as illustrated in the example above.

Syntax

public Object clone()

Technical Details

Returns:	A duplicate of the LinkedList object.