HackerRank Substring diff || Time Conversion

Given a time in -hour AM/PM format, convert it to military (24-hour) time.

Note: Midnight is 12:00:00AM on a 12-hour clock, and 00:00:00 on a 24-hour clock. Noon is 12:00:00PM on a 12-hour clock, and 12:00:00 on a 24-hour clock.

Function Description

Complete the timeConversion function in the editor below. It should return a new string representing the input time in 24 hour format.

Answer

String hasil="";

String ampm = (s.substring(s.length()-2));

String hh1 = s.substring(0,2);

String mn1 = s.substring(3,5);

String sc1 = s.substring(6,8);

int hh2 = Integer.parseInt(hh1);

int hh3 = 0;

if(ampm.equals("PM")){

if(hh1.equals("12")){

hh3=12;

}else{

hh3 = hh2+12;

}

}else if(ampm.equals("AM")){

if (hh1.equals("00")){

hh3 =12;

}else if(hh1.equals("12")){

hh3=0;

}else{

hh3 = hh2;

}

}

if(hh3<10){

hasil="0"+hh3+":"+mn1+":"+sc1;

}else{

hasil=hh3+":"+mn1+":"+sc1;

}

return hasil;

Thanks :)