ConcurrentSkipListSet contains() method in Java
Last Updated :
17 Sep, 2018
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:
import java.util.concurrent.*;
class ConcurrentSkipListSetContainsExample1 {
public static void main(String[] args)
{
ConcurrentSkipListSet<Integer>
set = new ConcurrentSkipListSet<Integer>();
for ( int i = 10 ; i <= 15 ; i++)
set.add(i);
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:
import java.util.concurrent.*;
class ConcurrentSkipListSetContainsExample2 {
public static void main(String[] args)
{
ConcurrentSkipListSet<String>
set = new ConcurrentSkipListSet<String>();
set.add( "Gfg" );
set.add( "is" );
set.add( "fun" );
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.
Reference: https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ConcurrentSkipListSet.html#contains-java.lang.Object-
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