package main;

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;

public class test {
	public static void main(String[] args) {
		 int mapCount = 50000000;
		 String tmp = "";
		 
		 Map<Integer,String> testMap = new HashMap<>();
		 String testValuehttp://www.mamicode.com/= "";
		 Long startTime0 = System.currentTimeMillis();
		 for(int i = 1;i<mapCount;i++){
			 tmp = testMap.put(i, testValue);
		 }
		 Long endTime0 = System.currentTimeMillis();
		 System.out.println(endTime0-startTime0);
		 
		 Long startTime1 = System.currentTimeMillis();
		 for(Entry<Integer,String> entry : testMap.entrySet()){
			 tmp = entry.getValue();
		 }
		 Long endTime1 = System.currentTimeMillis();
		 System.out.println(endTime1-startTime1);
		 
		 Long startTime2 = System.currentTimeMillis();
		 Iterator<Entry<Integer, String>> it = testMap.entrySet().iterator();
		 while(it.hasNext()){
			 tmp = it.next().getValue();
		 }
		 Long endTime2 = System.currentTimeMillis();
		 System.out.println(endTime2-startTime2);
		 
		 Long startTime3 = System.currentTimeMillis();
		 for(Integer i : testMap.keySet()){
			 tmp = testMap.get(i);
		 }
		 Long endTime3 = System.currentTimeMillis();
		 System.out.println(endTime3-startTime3);
		 
		 Long startTime4 = System.currentTimeMillis();
		 for(Entry<Integer,String> entry : testMap.entrySet()){
			 tmp = testMap.get(entry.getKey());
		 }
		 Long endTime4 = System.currentTimeMillis();
		 System.out.println(endTime4-startTime4);
		 
	}
}