/*
* Copyright 1999-2010 Luca Garulli (l.garulli--at--orientechnologies.com)
*
* 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.orientechnologies.orient.test.java.lang;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
public class DateConversionSpeedTest {
private static final long MAX = 100000000;
public static final void main(String[] args) throws ParseException {
long begin = System.currentTimeMillis();
String timer = String.valueOf(begin);
String timer2 = String.valueOf(timer + 1000000);
for (int i = 0; i < MAX; ++i) {
int result = timer.compareTo(timer2);
}
System.out.println("String: " + (System.currentTimeMillis() - begin));
// ------------------------------------------------------------------------
begin = System.currentTimeMillis();
final Date d = new Date(begin);
for (int i = 0; i < MAX; ++i) {
final long timerLong = Long.parseLong(timer);
int result = d.compareTo(new Date(timerLong));
}
System.out.println("Date: " + (System.currentTimeMillis() - begin));
// ------------------------------------------------------------------------
begin = System.currentTimeMillis();
final String today = "20110526165400";
final SimpleDateFormat df = new SimpleDateFormat("yyyyMMddHHmmss");
for (int i = 0; i < MAX; ++i) {
int result = d.compareTo(df.parse(today));
}
System.out.println("String: " + (System.currentTimeMillis() - begin));
// ------------------------------------------------------------------------
Calendar c = Calendar.getInstance();
c.setTimeInMillis(begin);
c.set(Calendar.HOUR_OF_DAY, 0);
c.set(Calendar.MINUTE, 0);
c.set(Calendar.SECOND, 0);
c.set(Calendar.MILLISECOND, 0);
final long roundedTime = c.getTimeInMillis();
System.out.println("original time.: " + begin);
System.out.println("rounded time..: " + roundedTime);
}
}