Hackerrank - Time Conversion

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

Note: - 12:00:00AM on a 12-hour clock is 00:00:00 on a 24-hour clock.
- 12:00:00PM on a 12-hour clock is 12:00:00 on a 24-hour clock.

Example

  • Return '12:01:00'.

  • Return '00:01:00'.

Function Description

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

timeConversion has the following parameter(s):

  • string s: a time in  hour format

Returns

  • string: the time in  hour format

Input Format

A single string  that represents a time in -hour clock format (i.e.:  or ).

Constraints

  • All input times are valid

Sample Input 0

07:05:45PM

Sample Output 0

19:05:45
import java.io.*;
import java.math.*;
import java.security.*;
import java.text.*;
import java.util.*;
import java.util.concurrent.*;
import java.util.function.*;
import java.util.regex.*;
import java.util.stream.*;
import static java.util.stream.Collectors.joining;
import static java.util.stream.Collectors.toList;

class Result {

    public static String timeConversion(String s) {
      String amOrPm = s.substring(s.length()-2);
      String[] components = s.substring(0,s.length()-2).split(":");

      if(amOrPm.equals("PM") && Integer.parseInt(components[0]) < 12){
          components[0] = (Integer.parseInt(components[0])+12)+"";
      }
      if(amOrPm.equals("AM") && components[0].equals("12")){
          components[0] = "00";
      }
      
      String res = components[0]+":"+components[1]+":"+components[2];
      
      return res;

    }



}

public class Solution {
    public static void main(String[] args) throws IOException {
        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));
        BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(System.getenv("OUTPUT_PATH")));

        String s = bufferedReader.readLine();

        String result = Result.timeConversion(s);

        bufferedWriter.write(result);
        bufferedWriter.newLine();

        bufferedReader.close();
        bufferedWriter.close();
    }
}


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