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( "GeeksforGeeks" );
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: [GeeksforGeeks, Geeks, Computer Science, Portal, Gfg] Traversing this Set: GeeksforGeeks Geeks Computer Science Portal Gfg