The iterator() method of CopyOnWriteArraySet returns an iterator over the elements in this Set in proper sequence. The iterator does NOT support the remove method.
Syntax:
public Iterator iterator()
Return Value: The function returns an iterator over the elements in the Set.
Below programs illustrate the above function:
Program 1:
// Java Program to illustrate the CopyOnWriteArraySet// iterator() method in Java  import java.util.concurrent.CopyOnWriteArraySet;import java.util.*;  public class GFG {    public static void main(String[] args)    {          // create object of CopyOnWriteArraySet        CopyOnWriteArraySet<Integer> ArrSet            = new CopyOnWriteArraySet<Integer>();          // Add elements        ArrSet.add(32);        ArrSet.add(67);        ArrSet.add(67);        ArrSet.add(100);          // print CopyOnWriteArraySet        System.out.println("CopyOnWriteArraySet: "                           + ArrSet);          // Call iterator() method of        Iterator iteratorVals = ArrSet.iterator();          // Print elements of iterator        // created from CopyOnWriteArraySet        System.out.println("\nThe iterator values of "                           + "CopyOnWriteArraySet are:\n");          // prints the elements using an iterator        while (iteratorVals.hasNext()) {            System.out.println(iteratorVals.next());        }    }} |
Output:
CopyOnWriteArraySet: [32, 67, 100] The iterator values of CopyOnWriteArraySet are: 32 67 100
Program 2:
// Java Program to illustrate the CopyOnWriteArraySet// iterator() method in Java  import java.util.concurrent.CopyOnWriteArraySet;import java.util.*;  public class GFG {    public static void main(String[] args)    {          // create object of CopyOnWriteArraySet        CopyOnWriteArraySet<String> ArrSet            = new CopyOnWriteArraySet<String>();          // Add elements        ArrSet.add("gopal");        ArrSet.add("gfg");        ArrSet.add("jgec");        ArrSet.add("sudo");          // print CopyOnWriteArraySet        System.out.println("CopyOnWriteArraySet: "                           + ArrSet);          // Call iterator() method of        Iterator iteratorVals = ArrSet.iterator();          // Print elements of iterator        // created from CopyOnWriteArraySet        System.out.println("\nThe iterator values of "                           + "CopyOnWriteArraySet are:\n");          // prints the elements using an iterator        while (iteratorVals.hasNext()) {            System.out.println(iteratorVals.next());        }    }} |
Output:
CopyOnWriteArraySet: [gopal, gfg, jgec, sudo] The iterator values of CopyOnWriteArraySet are: gopal gfg jgec sudo
Reference: https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/CopyOnWriteArraySet.html#iterator–
