Question

Complete the following method that takes a String parameter that is a time in American 12 hour format, such as "06:12 PM." The method returns a String with the same time in standard international 24 hour form. For example, given the parameter in the example above, the method would return "18:12." Values with AM correspond to times from 00:00 to 11:59 and PM for times from 12:00 to 23:59. Recall the method Integer.parseInt() takes a String parameter and returns the integer equivalent. And then simply I am supposed to create a method like so... public static String convertTime(String amerFormat) { }

Answer 1

public class AmericanTimeFormatting {

public static String convertTime(String amerFormat)

{

if(amerFormat.length()<8) {

System.out.println("Length of the input string should be 8");

return null;

}

else if(!Character.isDigit(amerFormat.charAt(0)) && !Character.isDigit(amerFormat.charAt(1)) && !Character.isDigit(amerFormat.charAt(3)) && Character.isDigit(amerFormat.charAt(4))) {

System.out.println("Digit is requird");

return null;

}

else if(amerFormat.charAt(2)!=':'|| amerFormat.charAt(7)!='.') {

System.out.println("Punctuation required");

return null;

}

//Am or Pm specification check

else if(!amerFormat.substring(5,7).equals("PM") && !amerFormat.substring(5,7).equals("AM")){

System.out.println("Required PM or AM");

return null;

}

else {

//For PM

if(amerFormat.substring(5,7).equals("PM")) {

String time="";

int hour=Integer.parseInt(amerFormat.substring(0,2));

hour=24-(12-hour);

time+=String.valueOf(hour)+":";

int minute=Integer.parseInt(amerFormat.substring(3,5));

time+=minute;

return time;

}

//For AM

else {

return amerFormat.substring(0,5);

}

}

}

public static void main(String[] args) {

String time=convertTime("06:12PM.");

if(!time.equals(null)) {

System.out.println("Time is "+time);

}

}

}