I have the following code and in need to replace the value on time from PT14H01M00S to 14:01:00 the following code is omit the first two char but I get 14H01M00S ,there is no way to do that without using string builder?
String time = "PT14H01M00S";
String substring = time .substring(2);
substring.replace("H", ":");
substring.replace("M", ":");
substring.replace("S", "");
System.out.println(substring);
You could use a regex and replace
^..(\d\d)H(\d\d)M(\d\d)S$
with
$1:$2:$3
(I leave the details of the code as an exercise for the reader.)
you forgot to do
String time = "PT14H01M00S";
String substring = time .substring(2);
substring = substring.replace("H", ":");
substring = substring.replace("M", ":");
substring = substring.replace("S", "");
System.out.println(substring);
so the substring is not getting the new value returned from replace method
ran it in here and got
It seems like you are trying to parse and format a JodaTime Period. You should not do it using the String class API. Use appropriate formatter already provided in JodaTime API.
You should build 2 PeriodFormatters using PeriodFormatterBuilder class, one for parsing the given string into a Period, and then second for formatting the Period to the required format:
String periodString = "PT14H01M00S";
PeriodFormatter parser = new PeriodFormatterBuilder()
.appendLiteral("PT")
.appendHours().appendSuffix("H")
.appendMinutes().appendSuffix("M")
.appendSeconds().appendSuffix("S")
.toFormatter();
PeriodFormatter formatter = new PeriodFormatterBuilder()
.minimumPrintedDigits(2)
.printZeroAlways()
.appendHours()
.appendSeparator(":")
.appendMinutes()
.appendSeparator(":")
.appendSeconds()
.toFormatter();
System.out.println(formatter.print(parser.parsePeriod(periodString)));
Output:
14:01:00
use this code instead :
String time = "PT14H01M00S";
String substring = time .substring(2);
substring = substring.replace("H", ":");
substring = substring.replace("M", ":");
substring = substring.replace("S", "");
the replace method doesn't change the string it was called upon, it returns a new string.
So what you want is:
String time = "PT14H01M00S";
String substring = time .substring(2);
substring = substring.replace("H", ":");
substring = substring.replace("M", ":");
substring = substring.replace("S", "");
I recommend the use of regular expressions to do this kind of tasks. They are very powerful to search and replace patterns of text.
I thinks this should work
String time = "PT14H01M00S".substring(2, time.length - 1).replace(/H|M/, ":");
use this code instead
String substring = time .substring(2);
substring = substring.replaceAll("[HM]",":").replace("S", "");
