package in.bench.resources.collection;

import java.util.HashMap;

public class HashMapIsEmptyOrNot {

	public static void main(String[] args) {

		// creating empty HashMap object of type <String, String>
		HashMap<String, String> hashMap = new HashMap<String, String>();


		// checking empty even before adding any Key-Value pairs
		boolean isEmpty1 = hashMap.isEmpty();


		System.out.println("1. Checking whether HashMap"
				+ " is Empty BEFORE adding any entries : " 
				+ isEmpty1);


		// adding key-value pairs to HashMap object
		hashMap.put("Google", "Sundar Pichai");
		hashMap.put("Facebook", "Mark Zuckerberg");
		hashMap.put("LinkedIn", "Reid Hoffman");
		hashMap.put("Apple", "Steve Jobs");
		hashMap.put("Microsoft", "Bill Gates");


		// checking empty adding few entries
		boolean isEmpty2 = hashMap.isEmpty();


		System.out.println("\n2. Checking whether HashMap"
				+ " is Empty AFTER adding few entries : " 
				+ isEmpty2);
	}
}

1. Checking whether HashMap is Empty BEFORE adding any entries : true

2. Checking whether HashMap is Empty AFTER adding few entries : false