Main.java Source code

Introduction

Here is the source code for Main.java

Source

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

public class Main {
    private static final int SECOND = 1000;
    private static final int MINUTE = 60 * SECOND;
    private static final int HOUR = 60 * MINUTE;
    private static final int DAY = 24 * HOUR;

    public static void main(String[] args) {

        Calendar now = Calendar.getInstance();
        Date nowDate = now.getTime();

        long twoHoursByMillis = 2 * HOUR;
        long thirtyMinutesByMillis = 30 * MINUTE;

        Date twoHoursAndThirtyMinutesFromNow = new Date(twoHoursByMillis + thirtyMinutesByMillis);
        System.out.println(String.format("now %s and later %s", nowDate, twoHoursAndThirtyMinutesFromNow));

        long ms = 10304004543l;
        StringBuilder text = new StringBuilder("");
        if (ms > DAY) {
            text.append(ms / DAY).append(" days ");
            ms %= DAY;
        }
        if (ms > HOUR) {
            text.append(ms / HOUR).append(" hours ");
            ms %= HOUR;
        }
        if (ms > MINUTE) {
            text.append(ms / MINUTE).append(" minutes ");
            ms %= MINUTE;
        }
        if (ms > SECOND) {
            text.append(ms / SECOND).append(" seconds ");
            ms %= SECOND;
        }
        text.append(ms + " ms");
        System.out.println(text.toString());
    }
}