Simple time converted using 2 methods. An input is seconds

SecondsToHHMMSS.java

package com.kamilszufnara;

//import java.time.LocalTime;

import java.time.LocalTime;

public class Main {

    public static void main(String[] args) {

        //for(int i=0; i<=1000; i+=15)
        //
        {

            // input i is time in seconds
            // it's being converted to format HH:MM:SS
            // Method 1

            int i = 590;
            int a = i / 3600;
            int b = (i - a * 3600) / 60;
            int c = (i - a * 3600) % 60;

            System.out.format("%02d:%02d:%02d \n", a, b, c);

//             Method 2 - no need to import java.time in 9th version od Java

            LocalTime timeOfDay = LocalTime.ofSecondOfDay(i);
            String time = timeOfDay.toString();

            System.out.println(time);

            // the result is the same 23:53:20


        }


    }
}