Java Minute floorTimestamp(Date ts, int windowMinutes)

Description

floor Timestamp

License

Apache License

Declaration

public static Date floorTimestamp(Date ts, int windowMinutes) 

Method Source Code

//package com.java2s;
/*/*from   w w  w  .  j a  va  2  s.  c  om*/
  Copyright 2015 The DiscoveryPlugins Authors
  <p/>
  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
  <p/>
  http://www.apache.org/licenses/LICENSE-2.0
  <p/>
  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.
 */

import java.util.*;

public class Main {
    public static Date floorTimestamp(Date ts, int windowMinutes) {
        Calendar calendar = Calendar.getInstance();
        calendar.set(Calendar.SECOND, 0);
        calendar.set(Calendar.MILLISECOND, 0);
        int modulo = calendar.get(Calendar.MINUTE) % windowMinutes;
        if (modulo > 0) {
            calendar.add(Calendar.MINUTE, -modulo);
        }
        long finalTS = calendar.getTime().getTime() / 1000;
        return new Date(finalTS);
    }
}

Related

1. calculateRuntimeMinutes(long startTime, long endTime)
2. calMinutes(Date date1, Date date2)
3. countMinute(Long time)
4. elapsedMinutes(int beginTimeInMinutes, int endTimeInMinutes)
5. extractMinutes(String[] parts)
6. getDateAfter(Date date, int minute)
7. getDateTime(Date d, int hour, int minute, int second, int millisecond)
8. isMinute(int num)
9. isValidMinute(final int min)