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–