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–