Can someone help me write this java program? Write a program that converts from
ID: 3596353 • Letter: C
Question
Can someone help me write this java program?
Write a program that converts from the 24-hour time format to the 12-hour time format. The following is a sample dialogue (user input is underlined):
Enter time in 24-hour notation:
13:07
That is the same as
1:07 PM
Again? (y/n)
Y
Enter time in 24-hour notation:
10:65
That is not a valid time
Try again:
10:35
That is the same as
10:35 AM
Again? (y/n)
N
End of program
Define an exception class called TimeFormatException so that if the user enters an illegal time, like 10:65, your program will throw, catch, and handle a TimeFormatException exception. Your program should also be able to handle an appropriate exception for gibberish entries, like &&*68, and so on.
You should create a project, named Project4 and the project should contain all the relevant classes for this application.
Your program should be well documented and in particular, begin with a series of comments specifying:
a brief description of what the program does.
Explanation / Answer
Please find my implementation.
import java.util.Scanner;
public class TimeFormat {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
while(true){
try{
System.out.println(" Enter time in 24-hour notation:");
String time = sc.next();
Scanner scanner = new Scanner(time);
scanner.useDelimiter(":");
int hour = Integer.parseInt(scanner.next());
if(hour < 0 || hour > 23){
scanner.close();
throw new TimeFormatException(" That is not a valid time");
}
int minute = Integer.parseInt(scanner.next());
if(minute < 0 || minute > 59) {
scanner.close();
throw new TimeFormatException(" That is not a valid time");
}
int hr = hour%12;
String strHr = Integer.toString(hr);
String strMin = Integer.toString(minute);
if(strHr.length() == 1)
strHr = "0"+strHr;
if(strMin.length() == 1)
strMin = "0"+strMin;
System.out.println("That is same as");
System.out.println(strHr+":"+strMin);
System.out.println(" Again? (y/n)");
String c = sc.next();
scanner.close();
if("n".equalsIgnoreCase(c))
break;
}catch (TimeFormatException e) {
System.out.println(e.getMessage());
System.out.println("Try Again");
}
}
sc.close();
}
}
class TimeFormatException extends Exception {
private String message;
public TimeFormatException(String message) {
this.message = message;
}
public String getMessage() {
return message;
}
}
/*
Sample run:
Enter time in 24-hour notation:
13:07
That is same as
01:07
Again? (y/n)
Y
Enter time in 24-hour notation:
10:65
That is not a valid time
Try Again
Enter time in 24-hour notation:
10:35
That is same as
10:35
Again? (y/n)
n
*/
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