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.