Suppose time is given in MM:SS(ex- 02:30) OR HH:MM:SS in String format.how can we convert this time to second.
3
- 2refer stackoverflow.com/questions/8826270/…Rince Thomas– Rince Thomas2015-03-26 07:21:04 +00:00Commented Mar 26, 2015 at 7:21
- 2or use JodaTime to parse to a duration: stackoverflow.com/questions/4619730/…allotria– allotria2015-03-26 07:24:46 +00:00Commented Mar 26, 2015 at 7:24
- 1also check stackoverflow.com/questions/15561580/…Rince Thomas– Rince Thomas2015-03-26 07:25:14 +00:00Commented Mar 26, 2015 at 7:25
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6 Answers
In your case, using your example you could use something like the following:
String time = "02:30"; //mm:ss String[] units = time.split(":"); //will break the string up into an array int minutes = Integer.parseInt(units[0]); //first element int seconds = Integer.parseInt(units[1]); //second element int duration = 60 * minutes + seconds; //add up our values If you want to include hours just modify the code above and multiply hours by 3600 which is the number of seconds in an hour.
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public class TimeToSeconds { // given: mm:ss or hh:mm:ss or hhh:mm:ss, return number of seconds. // bad input throws NumberFormatException. // bad includes: "", null, :50, 5:-4 public static long parseTime(String str) throws NumberFormatException { if (str == null) throw new NumberFormatException("parseTimeString null str"); if (str.isEmpty()) throw new NumberFormatException("parseTimeString empty str"); int h = 0; int m, s; String units[] = str.split(":"); assert (units.length == 2 || units.length == 3); switch (units.length) { case 2: // mm:ss m = Integer.parseInt(units[0]); s = Integer.parseInt(units[1]); break; case 3: // hh:mm:ss h = Integer.parseInt(units[0]); m = Integer.parseInt(units[1]); s = Integer.parseInt(units[2]); break; default: throw new NumberFormatException("parseTimeString failed:" + str); } if (m<0 || m>60 || s<0 || s>60 || h<0) throw new NumberFormatException("parseTimeString range error:" + str); return h * 3600 + m * 60 + s; } // given time string (hours:minutes:seconds, or mm:ss, return number of seconds. public static long parseTimeStringToSeconds(String str) { try { return parseTime(str); } catch (NumberFormatException nfe) { return 0; } } } import org.junit.Test; import static org.junit.Assert.*; public class TimeToSecondsTest { @Test public void parseTimeStringToSeconds() { assertEquals(TimeToSeconds.parseTimeStringToSeconds("1:00"), 60); assertEquals(TimeToSeconds.parseTimeStringToSeconds("00:55"), 55); assertEquals(TimeToSeconds.parseTimeStringToSeconds("5:55"), 5 * 60 + 55); assertEquals(TimeToSeconds.parseTimeStringToSeconds(""), 0); assertEquals(TimeToSeconds.parseTimeStringToSeconds("6:01:05"), 6 * 3600 + 1*60 + 5); } @Test public void parseTime() { // make sure all these tests fail. String fails[] = {null, "", "abc", ":::", "A:B:C", "1:2:3:4", "1:99", "1:99:05", ":50", "-4:32", "-99:-2:4", "2.2:30"}; for (String t: fails) { try { long seconds = TimeToSeconds.parseTime(t); assertFalse("FAIL: Expected failure:"+t+" got "+seconds, true); } catch (NumberFormatException nfe) { assertNotNull(nfe); assertTrue(nfe instanceof NumberFormatException); // expected this nfe. } } } } 
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int v = 0; for (var x: t.split(":")) { v = v * 60 + new Byte(x); } This snippet should support HH:MM:SS (v would result in seconds) or HH:MM (v would be in minutes)
Comments
try this
hours = totalSecs / 3600; minutes = (totalSecs % 3600) / 60; seconds = totalSecs % 60; timeString = String.format("%02d",seconds); 
3 Comments
Rince Thomas
hi, he already have the hour minutes and seconds(HH:MM:SS ). he want to convert it to milliseconds. first read the question properly. then answer
DavidPostill
@Signare He asks "how can we convert this time to second". He does not say millisecond!
Bilal Şimşek
minutes = (totalSecs % 3600) / 60; I was struggling minutes part. this line solved my problem. thanks.
private static final String TIME_FORMAT = "hh:mm a";//give whatever format you want. //Function calling long timeInMillis = TimeUtils.getCurrentTimeInMillis("04:21 PM"); long seconds = timeInMillis/1000; //Util Function public static long getCurrentTimeInMillis(String time) { SimpleDateFormat sdf = new SimpleDateFormat(TIME_FORMAT, Locale.getDefault()); // sdf.setTimeZone(TimeZone.getTimeZone("GMT")); //getting exact milliseconds at GMT // sdf.setTimeZone(TimeZone.getDefault()); Date date = null; try { date = sdf.parse(time); } catch (ParseException e) { e.printStackTrace(); } return date.getTime(); } 
Comments
I have written an extension function in Kotlin for converting String to seconds
fun String?.converTimeToSeconds(): Int { if (this.isNullOrEmpty().not()) { val units = this?.split(":")?.toTypedArray() if (units?.isNotEmpty() == true && units.size >= 3) { val hours = units[0].toInt() val minutes = units[1].toInt() val seconds = units[2].toInt() return (3660 * hours) + (60 * minutes) + seconds } } return 0 }
