Java Utililty Methods Time Format

if (time == null || time.trim().length() < 6 || time.trim().equals("000000"))
    return "";
return time.substring(0, 2) + ":" + time.substring(2, 4) + ":" + time.substring(4, 6);

String ret = time;
if (time.length() > 0 && time.indexOf(":") == -1) {
    if (time.length() == 4) {
        ret = time.substring(0, 2) + ":" + time.substring(2);
    } else if (time.length() == 3) {
        ret = "0" + time.substring(0, 1) + ":" + time.substring(1);
return ret;

if (timeStr.length() == 1) {
    timeStr = "0" + timeStr;
return timeStr;

StringBuffer sb = new StringBuffer();
sb.append(time.substring(0, 4) + "-" + time.substring(4, 6));
sb.append("-" + time.substring(6, 8) + " ");
sb.append(time.substring(8, 10) + ":" + time.substring(10, 12));
return sb.toString();

StringBuffer rv = new StringBuffer();
int seconds = (int) secs, minutes = 0, hours = 0, days = 0;
days = seconds / (60 * 60 * 24);
hours = seconds / (60 * 60) % 24;
minutes = (seconds / 60) % 60;
seconds = seconds % 60;
if (days > 0) {
    rv.append(days);
...

String result = "";
long time = timeInSeconds;
long seconds = time % 60;
time /= 60;
long minutes = time % 60;
time /= 60;
long hours = time % 24;
time /= 24;
...

int seconds = (int) secs;
int minutes = 0;
int hours = 0;
int days = 0;
days = seconds / (60 * 60 * 24);
hours = seconds / (60 * 60) % 24;
minutes = (seconds / 60) % 60;
seconds %= 60;
...

if (seconds == 0)
    return "0 seconds"; 
String date = "";
String[] unitNames = { "week", "day", "hour", "minute", "second" };
int[] unitValues = { 604800, 86400, 3600, 60, 1 };
for (int i = 0; i < unitNames.length; i++) {
    int quot = seconds / unitValues[i];
    if (quot > 0) {
...

return String.format("%02d", hour);

if (delta >= 1000)
    return "" + (delta / 1000) + "." + pad(delta % 1000, 3) + " seconds";
if (delta >= 100)
    return "0." + delta + " seconds";
if (delta >= 10)
    return "0.0" + delta + " seconds";
if (delta >= 0)
    return "0.00" + delta + "seconds";
...