/*
* 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");
}
}