content: /*
   * Copyright 1999-2012 Alibaba Group.
   *  
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *  
   *      http://www.apache.org/licenses/LICENSE-2.0
   *  
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package com.alibaba.cobar.util;
  
  import java.util.HashMap;
  import java.util.Map;
  
  /**
   * @author xianmao.hexm
   */
  public class HashMapMain {
  
      public void t() {
          String[] keys = new String[] { "a", "b", "c", "d", "e" };
          long t = System.currentTimeMillis();
          int count = 1000000;
          Map<String, String> m = new HashMap<String, String>();
          t = System.currentTimeMillis();
          for (int i = 0; i < count; i++) {
              for (String key : keys) {
                  m.put(key, "String.value");
              }
              for (String key : keys) {
                  m.remove(key);
              }
          }
          System.out.println((System.currentTimeMillis() - t) * 1000 * 1000 / (count * keys.length * 2) + " ns");
      }
  
  }
  