Question

write this program in java... don't forget to put comments.

You are writing code for a calendar app, and need to determine the end time of a meeting. Write a method that takes a String for a time in H:MM or HH:MM format (the program must accept times that look like 9:21, 10:52, and 09:35) and prints the time 25 minutes later.

For example, if the user enters 9:21 the method should output
9:46

and if the user enters 10:52 the method should output
11:17

and if the user enters 12:45 the method should output
1:10

Answer 1

import java.util.*;

public class Main
{
//method to calcuate the meeting end time
public static void meetingTime(String startTime)
{
//variable declaration and initialization
int hh=0, mm=0;
  
//check the hours is single digit or two digit
       if(startTime.charAt(1) == ':')
       {
       hh = Integer.parseInt(startTime.substring(0,1));
       mm = Integer.parseInt(startTime.substring(2,4));
       }
       else
       {
       hh = Integer.parseInt(startTime.substring(0,2));
       mm = Integer.parseInt(startTime.substring(3,5));
       }
      
       //calculate minutes
       mm = mm + 25;
       if(mm>59)
       {
       mm = mm % 60;
       hh++;
       }
      
       //check if hh is greater than 12
       if(hh>12)
       hh = hh % 12;
      
       //display the end time
       System.out.println("The end time of meeting is: "+hh+":"+mm);
}

   public static void main(String[] args)
   {
   //Scanner
   Scanner input = new Scanner(System.in);
  
   //get user input
       System.out.print("Enter the meeting start time: ");
       String startTime = input.nextLine();
  
//method calling
meetingTime(startTime);
   }
}

OUTPUT:

RUN 1:

Enter the meeting start time: 9:21
The end time of meeting is: 9:46

RUN 2:

Enter the meeting start time: 10:52
The end time of meeting is: 11:17

RUN 3:

Enter the meeting start time: 12:45
The end time of meeting is: 1:10