The size() method of CopyOnWriteArraySet returns the size of the Set. It returns the number of elements in the current Set.
Syntax:
public int size()
Return Value: The function returns the number of elements in the current Set.
Below programs illustrate the above function:
Program 1:
// Java Program to illustrate the CopyOnWriteArraySet// size() 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>();          // print CopyOnWriteArraySet        System.out.println("CopyOnWriteArraySet: "                           + ArrSet);          // size value print        System.out.println("size of ArrSet: "                           + ArrSet.size());          // Add elements        ArrSet.add(32);        ArrSet.add(67);        ArrSet.add(98);        ArrSet.add(100);          // print CopyOnWriteArraySet        System.out.println("CopyOnWriteArraySet: "                           + ArrSet);          // size value print        System.out.println("size of ArrSet: "                           + ArrSet.size());    }} |
Output:
CopyOnWriteArraySet: [] size of ArrSet: 0 CopyOnWriteArraySet: [32, 67, 98, 100] size of ArrSet: 4
Program 2:
// Java Program to illustrate the CopyOnWriteArraySet// size() 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);          // size value print        System.out.println("size of ArrSet: "                           + ArrSet.size());    }} |
Output:
CopyOnWriteArraySet: [gopal, gfg, jgec, sudo] size of ArrSet: 4
Reference: https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/CopyOnWriteArraySet.html#size–
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