Java HashSet Key Exists Example

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import java.util.Hashtable;

public class JavaHashTableKeyExists {

	public static void main(String[] args) {

		// create Hashtable object
		Hashtable hashTable = new Hashtable();

		// add key value pairs to Hashtable
		hashTable.put("1", "One");
		hashTable.put("2", "Two");
		hashTable.put("3", "Three");

		boolean exists = hashTable.containsKey("2");
		System.out.println("Result : " + exists);
	}
}

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