Java Hashtable Set View Of Keys Example

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import java.util.Enumeration;
import java.util.Iterator;
import java.util.Hashtable;
import java.util.Set;

public class JavaHashTableSetViewOfKeys {

	public static void main(String[] args) {

		Hashtable hashTable = new Hashtable();

		hashTable.put("1", "One");
		hashTable.put("2", "Two");
		hashTable.put("3", "Three");

		Set set = hashTable.keySet();

		System.out.println("Set created from Hashtable Keys contains :");

		Iterator itr = set.iterator();
		while (itr.hasNext())
			System.out.println(itr.next());

		set.remove("2");

		System.out.println("Hashtable keys after removal from Set are :");
		Enumeration enumeration = hashTable.keys();
		while (enumeration.hasMoreElements())
			System.out.println(enumeration.nextElement());
	}
}

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