Converting 24hour time to 12hour time?

Question

Hello I am using an android application and I am trying to figure out how to convert a 24 hour time to a 12hour time.

Example 
24 hour format 12:18:00

to 
12 hour format 12:18pm

Solution 1

Try using a SimpleDateFormat:

String s = "12:18:00";
DateFormat f1 = new SimpleDateFormat("HH:mm:ss"); //HH for hour of the day (0 - 23)
Date d = f1.parse(s);
DateFormat f2 = new SimpleDateFormat("h:mma");
f2.format(d).toLowerCase(); // "12:18am"

Solution 2

If you are using Java 8 or 9 you can use java.time library like this :

String time = "22:18:00";
String result = LocalTime.parse(time).format(DateTimeFormatter.ofPattern("h:mma"));

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Output

10:18PM