The clone() method of java.util.concurrent.ConcurrentSkipListSet is an in-built function in Java which returns a shallow copy of this ConcurrentSkipListSet instance.
Syntax:
ConcurrentSkipListSet.clone()
Parameters: The function does not accept any parameter.
Return Value: The function returns a shallow copy of ConcurrentSkipListSet.
Below programs illustrate the ConcurrentSkipListSet.clone() method:
Program 1:
// Java Program Demonstrate clone()// method of ConcurrentSkipListSetimport java.util.concurrent.*;  class ConcurrentSkipListSetCloneExample1 {    public static void main(String[] args)    {          // Initializing the set        ConcurrentSkipListSet<Integer>            set = new ConcurrentSkipListSet<Integer>();          // Adding elements to this set        for (int i = 10; i <= 15; i++)            set.add(i);          // Printing elements of the set        System.out.println("The set contains: " + set);          // Cloning the ConcurrentSkipListSet        ConcurrentSkipListSet<Integer> clone_set = set.clone();          // Adding elements to the clone set        clone_set.add(16);          // Printing elements of the clone set        System.out.println("The clone set contains: " + clone_set);    }} |
Output:
The set contains: [10, 11, 12, 13, 14, 15] The clone set contains: [10, 11, 12, 13, 14, 15, 16]
Program 2:
// Java Program Demonstrate clone()// method of ConcurrentSkipListSet */import java.util.concurrent.*;  class ConcurrentSkipListSetCloneExample2 {    public static void main(String[] args)    {          // Initializing the set        ConcurrentSkipListSet<String>            set = new ConcurrentSkipListSet<String>();          // Adding elements to this set        set.add("Gfg");        set.add("is");        set.add("fun");          // Printing elements of the set        System.out.println("The set contains: " + set);          // Cloning the ConcurrentSkipListSet        ConcurrentSkipListSet<String> clone_set = set.clone();          // Adding elements to the clone set        clone_set.add("site");          // Printing elements of the clone set        System.out.println("The clone set contains: " + clone_set);    }} |
Output:
The set contains: [Gfg, fun, is] The clone set contains: [Gfg, fun, is, site]
Reference: https://docs.oracle.com/javase/7/docs/api/java/util/concurrent/ConcurrentSkipListSet.html#clone()
