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.conatins() method:
// Java code to illustrate contains() method import 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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