TestPerfHashmap.java

gistfile1.java

import java.util.HashMap;

import javax.cache.CacheException;

import org.perf4j.StopWatch;

public class TestPerfHashmap {

 public static final String KEY = "KEY";
 public static final String VALUE = "VALUE";

 public static void main(String[] args) throws CacheException {

  StopWatch stopWatch = new StopWatch();

  HashMap<String, String> maps = new HashMap<>();
  for (int i = 0; i < 1_000_000; i++) {
   String key = KEY + i;
   String value = VALUE + i;
   System.out.println("get Object in memory :" + maps.get(key));

   // set a new object
   System.out.println("set Object in memory :" + maps.put(key, value));

   System.out.println("Get Object after set :" + maps.get(key));
  }

  stopWatch.stop();
  System.out.println("OldFashion Elapsed Time: " + stopWatch.getElapsedTime());

 }
}