boolean contains(Object element)

// Java code to illustrate
// SortedSet.contains() method
 
import java.io.*;
import java.util.*;
 
public class SortedSetDemo {
    public static void main(String args[])
    {
 
        // Creating an empty Set
        SortedSet<String> set
            = new TreeSet<String>();
 
        // Using add() method to
        // add elements into the Set
        set.add("Welcome");
        set.add("To");
        set.add("Geeks");
        set.add("4");
        set.add("Geeks");
 
        // Displaying the Set
        System.out.println("Set: " + set);
 
        // Check for "Geeks" in the set
        System.out.println(
            "Does the Set contains 'Geeks'? "
            + set.contains("Geeks"));
 
        // Check for "4" in the set
        System.out.println(
            "Does the Set contains '4'? "
            + set.contains("4"));
 
        // Check if the Set contains "No"
        System.out.println(
            "Does the Set contains 'No'? "
            + set.contains("No"));
    }
}

Set: [4, Geeks, To, Welcome]
Does the Set contains 'Geeks'? true
Does the Set contains '4'? true
Does the Set contains 'No'? false