Java HashSet Remove All Elements

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import java.util.HashSet;

public class JavaHashSetRemoveAllElements {

	public static void main(String[] args) {

		// create object of HashSet
		HashSet hashSet = new HashSet();

		// add elements to HashSet object
		hashSet.add(new Integer("1"));
		hashSet.add(new Integer("2"));
		hashSet.add(new Integer("3"));

		System.out.println("HashSet before removal : " + hashSet);

		hashSet.clear();
		System.out.println("HashSet after removal : " + hashSet);

		System.out.println("Is HashSet empty ? " + hashSet.isEmpty());

	}
}
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