Java TimeUnit Convert substract(Date date, long durationToSubstract, TimeUnit unit)

Description

substract

License

Apache License

Declaration

static Date substract(Date date, long durationToSubstract, TimeUnit unit) 

Method Source Code

//package com.java2s;
/* Copyright (c) 2011 Danish Maritime Authority.
 *
 * 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./*w  ww  . ja va  2s.  co m*/
 */

import java.util.Calendar;
import java.util.Date;
import java.util.concurrent.TimeUnit;

public class Main {
    static Date substract(Date date, long durationToSubstract, TimeUnit unit) {
        long result = unit.toSeconds(durationToSubstract);
        if (result >= Integer.MAX_VALUE) {
            throw new IllegalArgumentException("Cannot substract " + durationToSubstract);
        }
        Calendar c = Calendar.getInstance();
        c.setTime(date);
        c.add(Calendar.SECOND, -(int) result);
        return c.getTime();
    }
}

Related

1. getRemainingTimeToday(final TimeUnit timeUnit)
2. hoursToUnit(double hours, TimeUnit destinationUnit)
3. millisecondsTo(long milliseconds, final TimeUnit timeUnit)
4. millisToDuration(final int val, final TimeUnit unit)
5. stringToTimeUnit(String str)
6. timeToNanoSeconds(TimeUnit unit, long time)
7. toIntervalFromNow(long timeback, TimeUnit unit)
8. toMillis(Double sourceValue, TimeUnit sourceUnit)
9. toMillis(final long interval, final TimeUnit tu)