How can i change the 12 hrs to 24 hrs date format in java?

Question

I have a String "2014-11-04 10:30 PM", but I want to display as "2014-11-04 22:30. How can I do this ?

Thanks in advance.

Answer 1

In Java SimpleDateFormat you can use hh for 12 hours representation and HH for 24 hour representation.

Eg:

  String str="2014-11-04 10:30 PM";
  DateFormat df=new SimpleDateFormat("yyyy-MM-dd hh:mm a");
  Date date=df.parse(str);
  df=new SimpleDateFormat("yyyy-MM-dd HH:mm");
  System.out.println(df.format(date));

Out put:

2014-11-04 22:30

Answer 2

Your answer is here. SimpleDateFormat 24h

Use HH instead of hh with SimpleDateFormat class.

Best regards.

Answer 3

When using Java 8 you can make use of the new Time API

• java.time.format.DateTimeFormatter
• java.time.LocalDateTime

---

final String input = "2014-11-04 10:30 PM";
final DateTimeFormatter inFormatter = DateTimeFormatter.ofPattern("yyyy-MM-dd hh:mm a");
final DateTimeFormatter outFormatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm");
final LocalDateTime time = LocalDateTime.parse(input, inFormatter);

System.out.println(outFormatter.format(time));

Output:

2014-11-04 22:30