Java Utililty Methods Time to String

long timeRemaining = time;
String timeString = "";
if (timeRemaining >= DAY) {
    final int days = (int) (timeRemaining / DAY);
    timeString = timeString.concat(days + (days == 1 ? " day " : " days "));
    timeRemaining -= days * DAY;
if (timeRemaining >= HOUR) {
...

String hs = "";
int h = 0;
int m = 0;
if (s >= 3600) {
    h = s / 3600;
    hs = " " + h + " hrs";
    s = s - h * 3600;
if ((h > 0) || (s >= 60)) {
    m = s / 60;
    hs = hs + " " + m + " min";
    s = s - m * 60;
hs = hs + " " + s + " sec";
return hs;

String message = "";
if (time > 60) {
    int minutes = (int) Math.floor(time / 60), seconds = time - (minutes * 60);
    if (minutes > 60) {
        int hours = (int) Math.floor(minutes / 60);
        minutes -= (hours * 60);
        if (hours > 24) {
            int days = (int) Math.floor(hours / 24);
...

final StringBuilder buf = new StringBuilder(8);
timeToString(buf, time, 0); 
return buf.toString();

String result = "";
int hours, minutes, seconds;
int rest;
String strHour, strMinute, strSecond;
boolean hasHours = false, hasMinutes = false;
hours = time / HOURS_2_SECONDS;
rest = time % HOURS_2_SECONDS;
minutes = rest / MINUTES_2_SECONDS;
...

String timeAsString = "";
int highnibble = time;
int lownibble = highnibble % 16;
highnibble = (highnibble - lownibble) / 16;
double tempTime = Math.pow(2.0, highnibble) * lownibble * 0.25;
double seconds = tempTime % 60;
double minutes = (tempTime - seconds) / 60;
minutes = minutes % 60;
...

try {
    return ((date == null) ? "" : getTimeFormatter().format(date));
} catch (Exception e) {
    return "";

String str = "";
if ((System.currentTimeMillis() / 1000L) - time <= 0) {
    return "Not yet known";
long days = time / 86400;
time -= days * 86400;
long hours = time / 3600;
time -= hours * 3600;
...

long timeYears = time > year ? time / year : 0;
time -= timeYears * year;
long timeMonths = time > month ? time / month : 0;
time -= timeMonths * month;
long timeDays = time > day ? time / day : 0;
time -= timeDays * day;
long timeHours = time > hour ? time / hour : 0;
time -= timeHours * hour;
...

String returnTime = "";
long temp;
if (time / ONE_WEEK_IN_MILISECONDS > 0) {
    temp = time / ONE_WEEK_IN_MILISECONDS;
    returnTime += temp + "w ";
    returnTime += (time - temp * ONE_WEEK_IN_MILISECONDS) / ONE_DAY_IN_MILISECONDS + "d";
} else if (time / ONE_DAY_IN_MILISECONDS > 0) {
    temp = time / ONE_DAY_IN_MILISECONDS;
...