The forEach() method of CopyOnWriteArraySet is an in-built function in Java which is used to traverse each element in this Set.
Syntax:
public void forEach (Consumer<E> action)
Parameters: This method takes a parameter action which represents the action to be performed for each element.
Return Value: This method does not returns anything.
Exceptions: This method throws NullPointerException if the specified action is null.
Below program illustrates the forEach() function of CopyOnWriteArraySet class:
Example 1:
// Java Program to illustrate the CopyOnWriteArraySet// forEach() 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(2);        ArrSet.add(3);        ArrSet.add(4);        ArrSet.add(7);        ArrSet.add(8);          // print CopyOnWriteArraySet        System.out.println("CopyOnWriteArraySet: "                           + ArrSet);        System.out.println("Traversing this Set: ");          // Traverse this set using forEach() method        ArrSet.forEach((n) -> System.out.println(n));    }} |
Output:
CopyOnWriteArraySet: [2, 3, 4, 7, 8] Traversing this Set: 2 3 4 7 8
Example 2:
// Java Program to illustrate the CopyOnWriteArraySet// forEach() 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("Lazyroar");        ArrSet.add("Geeks");        ArrSet.add("Computer Science");        ArrSet.add("Portal");        ArrSet.add("Gfg");          // Print CopyOnWriteArraySet        System.out.println("CopyOnWriteArraySet: "                           + ArrSet);        System.out.println("Traversing this Set: ");          // Traverse this set using forEach() method        ArrSet.forEach((n) -> System.out.println(n));    }} |
Output:
CopyOnWriteArraySet: [Lazyroar, Geeks, Computer Science, Portal, Gfg] Traversing this Set: Lazyroar Geeks Computer Science Portal Gfg
