TreeSet contains() Method in Java
The Java.util.TreeSet.contains() method is used to check if a specific element is present in the TreeSet or not. So basically it is used to check if a TreeSet contains any particular element.
Syntax:
Tree_Set.contains(Object element)
Parameters: The parameter element is of the type of TreeSet. This is the element that needs to be checked if it is present in the TreeSet or not.
Return Value: The method returns true if the element is present in the set else it return False.
Below program illustrate the Java.util.TreeSet.contains() method:
Java
// Java code to illustrate contains() methodimport java.io.*;import java.util.TreeSet;public class TreeSetDemo { public static void main(String args[]) { // Creating an empty TreeSet TreeSet<String> tree = new TreeSet<String>(); // Use add() method to add elements into the Set tree.add("Welcome"); tree.add("To"); tree.add("Geeks"); tree.add("4"); tree.add("Geeks"); tree.add("TreeSet"); // Displaying the TreeSet System.out.println("TreeSet: " + tree); // Check for "TreeSet" in the set System.out.println("Does the Set contains 'TreeSet'? " + tree.contains("TreeSet")); // Check for "4" in the set System.out.println("Does the Set contains '4'? " + tree.contains("4")); // Check if the list contains "No" System.out.println("Does the Set contains 'No'? " + tree.contains("No")); }} |
TreeSet: [4, Geeks, To, TreeSet, Welcome] Does the Set contains 'TreeSet'? true Does the Set contains '4'? true Does the Set contains 'No'? false
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