The contains() method of java.util.concurrent.ConcurrentSkipListSet is an in-built function in Java which returns a true boolean value if the specified element is present in this set otherwise it returns false.
Syntax:
ConcurrentSkipListSet.contains(Object o)
Parameters: The function accepts a single parameter o i.e. to be checked for the presence in this set.
Return Value: The function returns a Boolean value. It returns True if the specified element is present in this set else it returns False.
Below programs illustrate the ConcurrentSkipListSet.contains() method:
Program 1:
// Java Program Demonstrate contains() // method of ConcurrentSkipListSet import java.util.concurrent.*;
class ConcurrentSkipListSetContainsExample1 {
public static void main(String[] args)
{
// Initializing the set
ConcurrentSkipListSet<Integer>
set = new ConcurrentSkipListSet<Integer>();
// Adding elements to this set
for ( int i = 10 ; i <= 15 ; i++)
set.add(i);
// Checks if 9 is present in the set
if (set.contains( 9 ))
System.out.println( "9 is present in the set." );
else
System.out.println( "9 is not present in the set." );
}
} |
Output:
9 is not present in the set.
Program 2:
// Java Program Demonstrate contains() // method of ConcurrentSkipListSet */ import java.util.concurrent.*;
class ConcurrentSkipListSetContainsExample2 {
public static void main(String[] args)
{
// Initializing the set
ConcurrentSkipListSet<String>
set = new ConcurrentSkipListSet<String>();
// Adding elements to this set
set.add( "Gfg" );
set.add( "is" );
set.add( "fun" );
// Checks if Gfg is present in the set
if (set.contains( "Gfg" ))
System.out.println( "Gfg is present in the set." );
else
System.out.println( "Gfg is not present in the set." );
}
} |
Output:
Gfg is present in the set.