Java Utililty Methods Duration Format

return Duration.ofMillis(elapsed).toString();

return String.format("%02d:%02d:%02d", elapsedSec / 3600, (elapsedSec % 3600) / 60, elapsedSec % 60);

if (input == null) {
    return "Forever!";
long inputSeconds = input / 1000;
long days = (inputSeconds / (24 * 60 * 60));
long hours = (inputSeconds / (60 * 60)) % 24;
long minutes = (inputSeconds / (60)) % 60;
long seconds = inputSeconds % 60;
...

if (milis < 10 * 1000) {
    return milis / 10 / 100.0 + " seconds";
long seconds = milis / 1000;
long minutes = seconds / 60;
long hours = minutes / 60;
String result = "";
if (hours > 0) {
...

long d = millis / DAY_IN_MILLIS;
long h = (millis - d * DAY_IN_MILLIS) / HOUR_IN_MILLIS;
long m = (millis - d * DAY_IN_MILLIS - h * HOUR_IN_MILLIS) / MINUTE_IN_MILLIS;
long s = (millis - d * DAY_IN_MILLIS - h * HOUR_IN_MILLIS - m * MINUTE_IN_MILLIS) / SECOND_IN_MILLIS;
long ms = millis % SECOND_IN_MILLIS;
StringBuilder sb = new StringBuilder();
appendTimePart(d, "d", sb);
appendTimePart(h, "h", sb);
...

final int millisInSecond = 1000;
final int millisInMinute = 60 * 1000;
final int millisInHour = 60 * 60 * 1000;
int hours = (int) (millis / millisInHour);
millis = millis - (hours * millisInHour);
int minutes = (int) (millis / millisInMinute);
millis = millis - (minutes * millisInMinute);
int seconds = (int) (millis / millisInSecond);
...

long seconds = milliseconds / 1000;
long hours = seconds / 3600;
seconds -= hours * 3600;
long minutes = seconds / 60;
seconds -= minutes * 60;
return (hours < 10 ? "0" : "") + hours + ":" + (minutes < 10 ? "0" : "") + minutes + ":"
        + (seconds < 10 ? "0" : "") + seconds;

int s = (int) (milliseconds / 1000);
milliseconds = milliseconds % 1000;
int m = s / 60;
s = s % 60;
int h = m / 60;
m = m % 60;
return padWithLeadingZeros(h, 2) + ":" + padWithLeadingZeros(m, 2) + ":" + padWithLeadingZeros(s, 2) + "."
        + padWithLeadingZeros((int) milliseconds, 3);
...

double nbSec = (double) ms / 1000.0;
return formatDuration(nbSec);

if (ms < 5 * 1000) {
    return ms + "ms";
} else if (ms < 3 * 60 * 1000) {
    return (ms / 1000) + "s";
} else if (ms < 120 * 60 * 1000) {
    return (ms / (60 * 1000)) + "m";
} else if (ms < 3 * 24 * 60 * 60 * 1000) {
    return (ms / (60 * 60 * 1000)) + "h";
...