Name: joT67522 Date: 12/05/97


To reproduce, compile and execute the following
class.

When compiled and executed under 1.1.3, the
expected ParseException is thrown.
CLASSPATH: c:/amiller/java/dev
            c:/app/jdk1.1.3/lib/classes.zip

When compiled and executed under 1.1.4, the
parsing succeeds.
CLASSPATH: c:/amiller/java/dev
            c:/app/jdk1.1.4/lib/classes.zip



import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;

public class DateTest2
{
    public static void main(String args[])
    {
        //
        // Date parse requiring 4 digit year.
        //
        String[] dstring = {"97","1997", "97","1997","01","2001", "01","2001"
, "1",
"1","11", "11","111", "111"};
        String[] dformat = {"yy", "yy","yyyy","yyyy","yy", "yy","yyyy","yyyy"
,
"yy","yyyy","yy","yyyy", "yy","yyyy"};
        boolean[] dresult = {true, false, false, true,true, false, false, true
,false,
false,true, false,false, false};
        SimpleDateFormat formatter;
        SimpleDateFormat resultFormatter = new SimpleDateFormat("yyyy");

        System.out.println("Format Source Result");
        System.out.println("------- ------- -------");
        for (int i = 0; i < dstring.length; i++)
        {
            System.out.print(dformat[i] + " " + dstring[i] + " ");
            formatter = new SimpleDateFormat(dformat[i]);
            try {
                System.out.print(resultFormatter.format(formatter.parse(dstring[
i])));
                if ( !dresult[i] ) System.out.print(" <-- error!");
            }
            catch (ParseException exception) {
                if ( dresult[i] ) System.out.print(" <-- error!");
                System.out.print("exception --> " + exception);
            }
            System.out.println();
        }
    }
}


New with jdk 1.1.4, the 4 digit year pattern "yyyy" does not fail when provided
only 2 digits!

If a SimpleDateFormat is created with a 4 digit year pattern ("yyyy"), I expect
parsing to fail if anything other than exactly 4 digits are provided for the year.
Similarly, if a SimpleDateFormat is created with 2 digit year pattern ("yy"), I
expect parsing to fail if anything other than exactly 2 digits are provided for the
year.

This is not the case. The following is the output of the class included below:

Format Source Result
------- ------- -------
yy 97 1997
yy 1997 3897 <-- error!
yyyy 97 0097 <-- error!
yyyy 1997 1997
yy 01 2001
yy 2001 3901 <-- error!
yyyy 01 0001 <-- error!
yyyy 2001 2001
yy 1 2001 <-- error!
yyyy 1 0001 <-- error!
yy 11 2011
yyyy 11 0011 <-- error!
yy 111 2011 <-- error!
yyyy 111 0111 <-- error!

I expected those lines marked with "<-- error!" to fail with a ParseException.

Please help me to understand this issue.

Thank you,
Andy.



(Review ID: 21283)
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