The size() method of CopyOnWriteArrayList returns the size of the list. It returns the number of elements in the list.
Syntax:
public int size()
Parameters: The function does not accepts any parameter.
Return Value: The function returns the size of the list.
Below programs illustrate the above function:
Program 1:
// Java Program to illustrate the CopyOnWriteArrayList// size() method in Javaimport java.util.concurrent.CopyOnWriteArrayList;import java.util.*;  public class GFG {    public static void main(String[] args)    {          // create object of CopyOnWriteArrayList        CopyOnWriteArrayList<Integer> ArrLis            = new CopyOnWriteArrayList<Integer>();          // Add elements        ArrLis.add(32);        ArrLis.add(67);        ArrLis.add(98);        ArrLis.add(100);          // print CopyOnWriteArrayList        System.out.println("CopyOnWriteArrayList: "                                          + ArrLis);          // size value print        System.out.println("size of ArrLis: "                               + ArrLis.size());    }} |
Output:
CopyOnWriteArrayList: [32, 67, 98, 100] size of ArrLis: 4
Program 2:
// Java Program to illustrate the CopyOnWriteArrayList// size() method in Javaimport java.util.concurrent.CopyOnWriteArrayList;import java.util.*;  public class GFG {    public static void main(String[] args)    {          // create object of CopyOnWriteArrayList        CopyOnWriteArrayList<String> ArrLis            = new CopyOnWriteArrayList<String>();          // Add elements        ArrLis.add("gopal");        ArrLis.add("gfg");        ArrLis.add("jgec");        ArrLis.add("sudo");          // print CopyOnWriteArrayList        System.out.println("CopyOnWriteArrayList: "                                           + ArrLis);          // size value print        System.out.println("size of ArrLis: "                                 + ArrLis.size());    }} |
Output:
CopyOnWriteArrayList: [gopal, gfg, jgec, sudo] size of ArrLis: 4
Reference: https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/CopyOnWriteArrayList.html#size–
