Java TimeUnit Usage formatDuration(long millis)

Description

This will return a rounded String representation of the given duration in milliseconds with a minimum of 1 time unit and a maximum of 2 time units.
Examples:

3785300: 1 hr, 3 min
81074000: 22 hrs, 31 min
97440000: 1 day, 3 hrs
478200: 7 minutes
18056000: 5 hours

License

Open Source License

Parameter

Parameter	Description
millis	- The amount of time in milliseconds

Return

- the amount of time passed in the format of:
# day(s), # (hour|hr)(s), # (minute|min)(s), # second(s)

Declaration

public static String formatDuration(long millis)

Method Source Code

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

import java.util.concurrent.TimeUnit;

public class Main {
    /**/*  w  w  w .  j a  v a2 s .  c  o  m*/
     * This will return a rounded String representation of the given duration in milliseconds
     * with a minimum of 1 time unit and a maximum of 2 time units.<br>
     * Examples:
     * <ul>
     * <li>3785300: 1 hr, 3 min</li>
     * <li>81074000: 22 hrs, 31 min</li>
     * <li>97440000: 1 day, 3 hrs</li>
     * <li>478200: 7 minutes</li>
     * <li>18056000: 5 hours</li>
     * </ul>
     * @param millis - The amount of time in milliseconds
     * @return - the amount of time passed in the format of:<br>
     * # day(s), # (hour|hr)(s), # (minute|min)(s), # second(s)
     */
    public static String formatDuration(long millis) {
        String formattedTimer = "";

        int days = (int) TimeUnit.MILLISECONDS.toDays(millis);
        long hours = TimeUnit.MILLISECONDS.toHours(millis) - (days * 24);
        long minutes = TimeUnit.MILLISECONDS.toMinutes(millis)
                - (TimeUnit.MILLISECONDS.toHours(millis) * 60);
        long seconds = TimeUnit.MILLISECONDS.toSeconds(millis)
                - (TimeUnit.MILLISECONDS.toMinutes(millis) * 60);

        if (days != 0) {
            formattedTimer += days + " day" + (days > 1 ? "s" : "");
        }
        if (hours != 0) {
            String unit = (days > 0 || (days == 0 && minutes > 0) ? " hr"
                    : " hour") + (hours > 1 ? "s" : "");
            formattedTimer += (formattedTimer.length() != 0 ? ", " : "")
                    + hours + unit;
        }
        if (minutes != 0 && days == 0) {
            String unit = (hours > 0) ? " min" : " minute"
                    + (minutes > 1 ? "s" : "");
            formattedTimer += (formattedTimer.length() != 0 ? ", " : "")
                    + minutes + unit;
        }
        if (seconds != 0 && days == 0 && hours == 0 && minutes == 0) {
            String unit = " second" + (seconds > 1 ? "s" : "");
            formattedTimer += (formattedTimer.length() != 0 ? ", " : "")
                    + seconds + unit;
        }

        return !formattedTimer.isEmpty() ? formattedTimer : "0 seconds";
    }
}