Java TimeUnit Usage generateRandomDateTimeForLogEvent(Date laterThan)

Description

generate Random Date Time For Log Event

License

Open Source License

Declaration

public static Date generateRandomDateTimeForLogEvent(Date laterThan) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;

import java.util.TimeZone;
import java.util.concurrent.TimeUnit;

public class Main {
    public static Date generateRandomDateTimeForLogEvent(Date laterThan) {
        Calendar cal = Calendar.getInstance(TimeZone.getTimeZone("UTC"));

        if (laterThan == null) {
            cal.add(GregorianCalendar.YEAR, -1);
            cal.add(GregorianCalendar.MONTH, (int) (Math.round(Math.random() * 12)) * -1);
            cal.add(GregorianCalendar.WEEK_OF_MONTH, (int) (Math.round(Math.random() * 4)) * -1);
            cal.add(GregorianCalendar.DAY_OF_WEEK, (int) (Math.round(Math.random() * 7)) * -1);
            laterThan = cal.getTime();/*from www  .ja  v  a2 s.  c o  m*/
        }

        long randomAdditionalTime = (long) (Math.round(Math.random() * TimeUnit.DAYS.toMillis(1)));
        cal.setTimeInMillis(laterThan.getTime() + randomAdditionalTime);
        return cal.getTime();
    }
}

Related

1. formatTime(String format, double nanoseconds)
2. formatTimeDuration(long duration)
3. formatTimeInMilliSeconds(long duration)
4. formatUptime(long startTime)
5. formatUptime(long uptimeInMs)
6. getAge(Date birthday)
7. getAge(long currentTimeMillis, long headerTimestampSec)
8. getAllCombinations( ArrayList lengths)
9. getAllDaysCount(final long milliseconds)