Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
// This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.

import java.util.Calendar;

public class Main {
    public static Calendar calculateNextAlarmTime(int repetition) {
        if (repetition == 0)
            return null;
        Calendar alarmTime = Calendar.getInstance();
        alarmTime.set(Calendar.HOUR_OF_DAY, 20);
        alarmTime.set(Calendar.MINUTE, 0);
        alarmTime.set(Calendar.SECOND, 0);

        int day_of_week = alarmTime.get(Calendar.DAY_OF_WEEK) - 2;
        if (day_of_week == -1)
            day_of_week = 6;// sunday
        repetition &= 0x7f;
        int rot = (repetition >> (day_of_week + 1)) | (repetition << (7 - day_of_week - 1));
        rot &= 0x7f;
        int ndays = 0;
        for (ndays = 0; ndays < 7; ndays++) {
            if ((rot & (1 << ndays)) != 0)
                break;
        }
        alarmTime.add(Calendar.DATE, ndays + 1);

        return alarmTime;
    }
}