An Example of Using HashSet in Java

The following code example demonstrates An Example of Using HashSet in Java.

Basically, HashSet works very fast because it uses hashcodes. However, we can not predict the order of elements in a HashSet collection.

import java.util.HashSet;
import java.util.Iterator;

public class HashSetDemo {

	public static void main(String[] args) {
		// TODO Auto-generated method stub

		HashSet<Integer> hash=new HashSet<Integer>();
		hash.add(45);
		hash.add(12);
		hash.add(4);
		hash.add(145);
		hash.add(405);
		hash.add(38);

		System.out.println("Elements in the HashSet: ");
		Iterator it=hash.iterator();
		while(it.hasNext())
		{
			System.out.println(it.next()+" ");
		}	
	}
}

Output

**Demonstrating An Example of Using HashSet in Java**

Further Reading