import java.util.HashSet;

/*
 * Example of contains(Object o) method.
 */
public class HashSetExample
{
    public static void main( String[] args )
    {
        HashSet<String> hashSet = new HashSet<String>();

        hashSet.add("Dave");
        hashSet.add("Peter");
        hashSet.add("Phil");
        hashSet.add("Rohit");
        hashSet.add("Virat");

        System.out.println("hashSet: " + hashSet + "\n");

        /*
         * Returns true if this set contains the specified element.
         */
        boolean isExist = hashSet.contains("Peter");
        System.out.println("is 'Peter' Exist : " + isExist);
        
        isExist = hashSet.contains("Juli");
        System.out.println("is 'Juli' Exist : " + isExist);

    }
}