[SOLVED] Display humanized time output

Display humanized time output

I am trying to display following message in one of my application to show the waiting time

2 hours, 3 mins and 4 s
1 hour and 2 s

As you can see there can be many variations and I am struggling to get this done. The following code works well is the given number of secs gives out non-zero hr, min and sec, but this is getting completed if I have to handle the case where only I have hours and secs to display and no minutes to display.

Also not sure where to add those string 'and' and the comma.

I believe there should be already a solution for this which I may not know.

public class HumanizedWaitDisplay {

public static void main(String[] args) {
    int noOfSecToWait = 60*60*2 + 30;
    System.out.println("Waiting for " + getHumanizedTime(noOfSecToWait));
}

private static String getHumanizedTime(int seconds) {
    String out ="";
    int hr = seconds/(60*60);
    seconds = seconds%(60*60);
    int min = seconds/(60);
    seconds = seconds%(60);

    if(hr>0) {
        out +=  hr + " hour" +(hr == 1 ? " ":"s ");
    }
    if(min > 0){
        out +=  min + " min" +(min == 1 ? " ":"s ");
    }
    if(seconds > 0){
        out +=  seconds + " s";
    }
    return out;
}
}

Let me know if you have come across such thing.

Solution

You can use the java date and time api. Brief example (using the method signature you provided at question body) :

static DateFormat dateFormat = new SimpleDateFormat("dd/MM/yy"); //specifiy the 
//representation pattern. This is for example. You can construct it more accurate:
//display the hours, mins, secs, etc. Also you can specify your own delimiters. 
//See more at docs below

static { //upd: set the proper timezone
    dateFormat.setTimeZone(TimeZone.getTimeZone("GMT"));
}

private static String getHumanizedTime(int seconds) {
    long timeInMillis = seconds * 1000; //Date object is designed for millis
    Date date = new Date(timeInMillis);
    return dateFormat.format(date);
}

Update : if you want the output to be something like "11 hours, 15 minutes and 34 seconds", try that :

static DateFormat dateFormat = new SimpleDateFormat("HH 'hours,' mm 'minutes and' ss 'seconds'");