package string;

public class Question36 {

public static void main(String[] args) {

Time time = Time.of("05:50");

Time outputTime = time.add(Duration.of("01:31"));

System.out.println(outputTime);

}

private static class Time {

private final int hours;

private final int minutes;

private final String time;

private static final int MAX_HOURS=24;

private static final int MAX_MINUTES=60;

private Time(int hours, int minutes) {

this.hours = hours;

this.minutes = minutes;

time = hours + ":" + minutes;

}

private Time(String time) {

this.time = time;

hours = Integer.parseInt(time.split(":")[0]);

minutes = Integer.parseInt(time.split(":")[1]);

verifyHours(hours);

verifyMinutes(minutes);

}

private void verifyMinutes(int minutes) {

if (minutes<0 || minutes>= MAX_MINUTES)

throw new IllegalArgumentException("Minutes must be between 0 and 60");

}

public static Time of(String time) {

return new Time(time);

}

public static Time of(int hours, int minutes) {

return new Time(hours, minutes);

}

private void verifyHours(int hours) {

if (hours<0 || hours>= MAX_HOURS)

throw new IllegalArgumentException("Hours must be between 0 and 24");

}

public Time add(Duration duration) {

int outputHours = ((this.minutes + duration.minutes) / 60) + this.hours + duration.hours;

int outputMinutes = (this.minutes + duration.minutes) %60 ;

return new Time(outputHours, outputMinutes);

}

@Override

public String toString() {

return String.format("%02d:%02d", hours, minutes);

}

}

private static class Duration {

private final int hours;

private final int minutes;

private final String time;

private Duration(int hours, int minutes) {

this.hours = hours;

this.minutes = minutes;

this.time = hours + ":" + minutes;

}

private Duration(String time){

this.time = time;

hours = Integer.parseInt(time.split(":")[0]);

minutes = Integer.parseInt(time.split(":")[1]);

}

public static Duration of(String time){

return new Duration(time);

}

public static Duration of(int hours, int minutes){

return new Duration(hours, minutes);

}

@Override

public String toString() {

return String.format("%02d:%02d", hours, minutes);

}

}

}