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Time.java
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Time.java
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import java.util.Scanner;
public class Time
{
public static void main(String[] args)
{
Scanner input = null;
try
{
input = new Scanner(System.in);
System.out.println("Enter first time(24 hour) in HH:mm:ss format");
String time1 = input.next();
System.out.println("Enter second time(24 hour) in HH:mm:ss format");
String time2 = input.next();
if (isTimeValid(time1) && isTimeValid(time2)) {
// Separating first String using delimiter ":"
String[] firstTimeParts = time1.split(":");
// Converting String to Integer
int hours1 = Integer.parseInt(firstTimeParts[0]);
int minutes1 = Integer.parseInt(firstTimeParts[1]);
int seconds1 = Integer.parseInt(firstTimeParts[2]);
// Separating second String using delimiter ":"
String[] secondTimeParts = time2.split(":");
// Converting String to Integer
int hours2 = Integer.parseInt(secondTimeParts[0]);
int minutes2 = Integer.parseInt(secondTimeParts[1]);
int seconds2 = Integer.parseInt(secondTimeParts[2]);
int hours = hours1 + hours2;
int minutes = minutes1 + minutes2;
int seconds = seconds1 + seconds2;
int days = 0;
if (seconds > 59) {
seconds = seconds - 60;
minutes = minutes + 1;
if (minutes > 59) {
minutes = minutes - 60;
hours = hours + 1;
if (hours > 23) {
hours = hours - 24;
days = days + 1;
}
} else {
if (hours > 23) {
hours = hours - 24;
days = days + 1;
}
}
} else {
if (minutes > 59) {
minutes = minutes - 60;
hours = hours + 1;
if (hours > 23) {
hours = hours - 24;
days = days + 1;
}
} else {
if (hours > 23) {
hours = hours - 24;
days = days + 1;
}
}
}
// Converting each integer value of String and combining all Strings.
String finalTime = String.valueOf(days) + ":" + String.valueOf(hours) + ":" + String.valueOf(minutes) + ":" + String.valueOf(seconds);
System.out.println("New time is :\n" + finalTime);
System.out.println("OR");
System.out.println(days + " Days " + hours + " Hours " + minutes + " Minutes " + seconds + " Seconds ");
} else {
System.out.println("Time is not valid.");
}
} finally
{
if (input != null)
{
input.close();
}
}
}
private static boolean isTimeValid(String time)
{
boolean result = false;
/*
* Regular expression that matches String with format HH:mm:ss
* HH -> 0-23
* mm -> 0-59
* ss -> 0-59
*/
String pattern = "(0?[0-9]|1[0-9]|2[0-3]):(0?[0-9]|[1-5][0-9]):(0?[0-9]|[1-5][0-9])";
if (time.matches(pattern))
{
result = true;
}
return result;
}
}