/*
* Copyright (c) 2013, OpenCloudDB/MyCAT and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software;Designed and Developed mainly by many Chinese
* opensource volunteers. you can redistribute it and/or modify it under the
* terms of the GNU General Public License version 2 only, as published by the
* Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Any questions about this component can be directed to it's project Web address
* https://code.google.com/p/opencloudb/.
*
*/
package org.opencloudb.util;
import java.util.HashMap;
import java.util.Map;
/**
* @author mycat
*/
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");
}
}