How to Format a Duration in H:MM:SS Format in Java?

Formatting Durations in Java (H:MM:SS)

Question:

How can I format a duration, represented in seconds, in the H:MM:SS format in Java?

Answer:

To format a duration using the H:MM:SS pattern, you can use the following approach:

1. Create a Formatter object: This object will handle the formatting of the duration.

   java.util.Formatter formatter = new java.util.Formatter();

2. Use the %d modifier: This modifier specifies that the variable should be formatted as a decimal integer.

   formatter.format("%d:%02d:%02d", seconds / 3600, (seconds % 3600) / 60, (seconds % 60));

3. Append zeros for minutes and seconds: The d modifier ensures that the minutes and seconds are always formatted with two digits, even if they are less than 10.

4. Retrieve the formatted string: Finally, retrieve the formatted duration by calling the toString() method on the formatter object.

   String formattedDuration = formatter.toString();

Example:

int seconds = 3661;
String formattedDuration = String.format("%d:%02d:%02d", seconds / 3600, (seconds % 3600) / 60, (seconds % 60));
System.out.println(formattedDuration); // Output: 1:01:01

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