(Current time) Listing 1, ShowCurrentTime.java, gives a program that displays the current...

(Current time) Listing 1, ShowCurrentTime.java, gives a program that displays the current time in GMT. Revise the program so that it prompts the user to enter the time zone offset to GMT and displays the time in the specified time zone. Here is a sample run:

LISTING 1 ShowCurrentTime.java

1 public class ShowCurrentTime {
2      public static void main(String[] args) {
3           // Obtain the total milliseconds since midnight, Jan 1, 1970
4           long totalMilliseconds = System.currentTimeMillis();
5
6           // Obtain the total seconds since midnight, Jan 1, 1970
7           long totalSeconds = totalMilliseconds / 1000;
8
9           // Compute the current second in the minute in the hour
10         long currentSecond = totalSeconds % 60;
11
12         // Obtain the total minutes
13         long totalMinutes = totalSeconds / 60;
14
15         // Compute the current minute in the hour
16         long currentMinute = totalMinutes % 60;
17
18         // Obtain the total hours
19         long totalHours = totalMinutes / 60;
20
21         // Compute the current hour
22         long currentHour = totalHours % 24;
23
24         // Display results
25         System.out.println("Current time is " + currentHour + ":"
26         + currentMinute + ":" + currentSecond + " GMT");
27    }
28 }