CODEWITHSUNDEEP
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Reputation: 85

Add hours and Minutes to a certain time java

I have String initialTime= "10:30:00" I am converting it into time like so:- 

DateFormat sdf = new SimpleDateFormat("hh:mm:ss");
Date date = sdf.parse(initialTime);
Time time = new Time(date.getTime());
int initHour = time.getHours()
int initMind = time.getMinutes();

Further I have two values;

int hour, mins;

The hour value can be anything from 0-10; mins value can be 0,15,30,45.

The user selects a time by selecting hour and mins. As soon as the user selects the values they should get added to the initialTimeand shown in finalTIme

So if:-

hour=0 and mins=15 then finalTIme=10:45:00
hour=0 and mins=35 then finalTIme=11:00:00
hour=0 and mins=45 then finalTIme=11:15:00

I tried doing something like:-

if(hour==0 && mins==0)
{
    finalTime = initialTime;
}

else if(hour==0 && mins>0 && mins <30)
{
   mins = initMins + mins 
}
else if(hour==0 && mins>0 && mins >=30)
{
   hours = hours+1;
   mins = mins-60;
}

But I did not get the required output. HOw can I do it in a less complicated manner?

Upvotes: 3

Views: 6422

Answers (1)

Arek
Arek

Reputation: 3186

You can use java.util.Calendar class:

DateFormat sdf = new SimpleDateFormat("hh:mm:ss");
Date date = sdf.parse(initialTime);
Calendar cal = Calendar.getInstance();
cal.setTime(date);

cal.add(Calendar.HOUR_OF_DAY, hours);
cal.add(Calendar.MINUTE, minutes);

date = cal.getTime();

You might also consider the new Date API from JDK 8.

Upvotes: 5

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