hashset java
// Java program to demonstrate working of HashSet
import java.util.*;
class HashSetDemo {
// Main Method
public static void main(String[] args)
{
HashSet<String> h = new HashSet<String>();
// Adding elements into HashSet usind add()
h.add("India");
h.add("Australia");
h.add("South Africa");
h.add("India"); // adding duplicate elements
// Displaying the HashSet
System.out.println(h);
System.out.println("List contains India or not:"
+ h.contains("India"));
// Removing items from HashSet using remove()
h.remove("Australia");
System.out.println("List after removing Australia:"
+ h);
// Iterating over hash set items
System.out.println("Iterating over list:");
Iterator<String> i = h.iterator();
while (i.hasNext())
System.out.println(i.next());
}
}