Java format hour and min

Question

I need to format my time string such as this:

int time = 160;

Here\'s my sample code:

public static String formatDuration(         


        

Answer 1

Just try

sdf = new SimpleDateFormat("HH 'hrs' mm 'mins'");

There is a good documentation https://docs.oracle.com/javase/6/docs/api/java/text/SimpleDateFormat.html From the doc:

"Text can be quoted using single quotes (') to avoid interpretation."

Answer 2

int minutes = 160;

int h = minutes / 60;
int m = minutes % 60;

String.format("%d hr %d mins",h,m); // output : 2 hr 40 mins

Answer 3

Another simple approach could be something along the lines:

public static String formatDuration(String minute){
    int minutes = Integer.parseInt(minute);

    int hours = minutes / 60;
    minutes = minutes % 60;

    return hours + "hrs " + minutes + "mins.";
}

Answer 4

Since, it's 2018, you really should be making use of the Date/Time libraries introduced in Java 8

String minutes = "160";
Duration duration = Duration.ofMinutes(Long.parseLong(minutes));

long hours = duration.toHours();
long mins = duration.minusHours(hours).toMinutes();

// Or if you're lucky enough to be using Java 9+
//String formatted = String.format("%dhrs %02dmins", duration.toHours(), duration.toMinutesPart());
String formatted = String.format("%dhrs %02dmins", hours, mins);
System.out.println(formatted);

Which outputs...

2hrs 40mins

Why use something like this? Apart of generally been a better API, what happens when minutes equals something like 1600?

Instead of printing 2hrs 40mins, the above will display 26hrs 40mins. SimpleDateFormat formats date/time values, it doesn't deal with duration