package com.nis.test;

import java.util.Collections;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;


public class HashMapTest {

	public static void main(String[] args) {
		HashMap<String, Integer> map = new HashMap<>();
		//Hashtable<String, Integer> hashTable = new Hashtable<String, Integer>();
		//ConcurrentHashMap<String, Integer> concurrentHashMap = new ConcurrentHashMap<String, Integer>();
		//Map<String, Integer>  m = Collections.synchronizedMap(new HashMap());

	}

}
