Check the Date Format.

[dmjpro]

Now a days I take care of sensitive coding rather than completing the code anyhow.
So have a look at this code.
I am trying to check the Date Format.
I am here assuming that the date separator string is either "-" or "/".
First I thought to do it using Regular Expression, but I am new to Regular Expression.
So experts please do some comments here to improve the sensitivity of this code.

Date checkDate(String date)throws Exception {
        Date temp_d;
        try{
            temp_d = d.parse(date);
            StringTokenizer st = new StringTokenizer(date,"-");
            int m = Integer.parseInt(st.nextToken())-1,
                d = Integer.parseInt(st.nextToken()),
                y = Integer.parseInt(st.nextToken());
            c.setTime(temp_d);
            if(m!=c.get(Calendar.MONTH) || d!=c.get(Calendar.DATE) || y!=c.get(Calendar.YEAR)) throw new Exception("Wrong date format");
            return temp_d;
        }catch(Exception e)
        {
            throw e;
        }
    }
 

Please do some comments on it.
Is anything there to improve the logic :-)

Kind regards,
Dmjpro.

[Ozzi]

I would rather use SimpleDateFormat. Here is a very simple example of use.

 //example of String to test
String myDate = "02.03.2007";
 
Date parsed = null;
boolean formatOK = false;
 
//first correct format
SimpleDateFormat format1 =
new SimpleDateFormat("dd/MM/yyyy");
 
//second correct format
SimpleDateFormat format2 =
new SimpleDateFormat("dd.MM.yyyy");
 
//if an unarseable exception occurs, we have to try the second format
try {
parsed = format1.parse(myDate);
formatOK = true;
}catch (Exception e) {
//do whatever
}
 
//if the String doesn't follows the second format
if(!formatOK){
try {
parsed = format2.parse(myDate);
formatOK = true;
} catch (ParseException e1) {
//do whatever
}
 
}
 
System.out.println(formatOK?"format OK":"format KO");

[dmjpro]

Ooops!
Sorry for some code missing :-)
The appropriate code is ........... "c" and "d" defined as

DateFormat d = new SimpleDateFormat("MM-dd-yyyy");
Calendar c = new GregorianCalendar();
 

Sorry ... Now it's Ok !
Please do some comments on it.

Kind regards,
Dmjpro.

[dmjpro]

I would rather use SimpleDateFormat. Here is a very simple example of use.

//example of String to test
String myDate = "02.03.2007";

Date parsed = null;
boolean formatOK = false;

//first correct format
SimpleDateFormat format1 =
new SimpleDateFormat("dd/MM/yyyy");

//second correct format
SimpleDateFormat format2 =
new SimpleDateFormat("dd.MM.yyyy");

//if an unarseable exception occurs, we have to try the second format
try {
parsed = format1.parse(myDate);
formatOK = true;
}catch (Exception e) {
//do whatever
}

//if the String doesn't follows the second format
if(!formatOK){
try {
parsed = format2.parse(myDate);
formatOK = true;
} catch (ParseException e1) {
//do whatever
}

}

System.out.println(formatOK?"format OK":"format KO");

I appreciate your coding :-)
But please, try to use Code tags.
Please read posting guidelines before Post.

Debasis Jana

[dmjpro]

I appreciate your coding :-)
But please, try to use Code tags.
Please read posting guidelines before Post.

Debasis Jana

Hey please do comments :-)

Debasis Jana