The contains() method is used to check whether a specific element is present in the SortedSet or not. So basically it is used to check if a SortedSet contains any particular element.
Syntax:
boolean contains(Object element)
Parameters: The parameter element is of the type of SortedSet. This is the element that needs to be tested if it is present in the set or not.
Return Value: The method returns true if the element is present in the set else return False.
Note: The contains() method in SortedSet is inherited from the Set interface in Java.
Below program illustrate the Java.util.Set.contains() method:
// 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
Reference: https://docs.oracle.com/javase/7/docs/api/java/util/Set.html#contains(java.lang.Object)