Sets the time of the given calendar to the first millisecond of the day that is already set. - Java java.util

Java examples for java.util:Millisecond

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Description

Sets the time of the given calendar to the first millisecond of the day that is already set.

Demo Code


//package com.java2s;
import java.util.Calendar;

public class Main {
    public static void main(String[] argv) throws Exception {
        Calendar c = Calendar.getInstance();
        setToDaysFirstMillisecond(c);//www.  j ava2  s  . c  o m
    }

    /**
     * Sets the time of the given calendar to the first millisecond of the day
     * that is already set.
     * 
     * @param c
     *            The calendar whose time should be set to the first millisecond
     *            of the given day.
     */
    public static void setToDaysFirstMillisecond(Calendar c) {
        // The following lines are necessary to retrieve the "first" midnight of
        // the day. Because of the daylight savings, a day can have two
        // midnights (in some time zones).
        c.add(Calendar.DAY_OF_YEAR, -1);
        c.set(Calendar.HOUR_OF_DAY, 23);
        c.set(Calendar.MINUTE, 59);
        c.set(Calendar.SECOND, 59);
        c.set(Calendar.MILLISECOND, 999);
        c.add(Calendar.MILLISECOND, 1);
    }
}

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