Hello all,
I have discovered a bug (?) in jdk 1.1.7-v1a-glibc
I am running a RedHat 5.2 i386 Linux with 2.2.5 kernel on a K6II-350
MHz/64 Mb RAM
I am setting a new SimpleDateFormat with "yyyy-MM-dd" parsing format and
I'm trying to parse and use some dates.
Curiously, the ONLY date that doesn't work corectly is 1999-04-30 (ie
April 30 in 1999).
Any (29)30(31) of other months are working just fine!
I am sending you also a small program to check and proove the error.
The output of the program is :
Parsing and testing the date of 1999 April 29
The parsed day is Thu Apr 29 00:00:00 GMT+02:00 1999
The date formatted as yyyy-MM-dd is 1999-04-29
Parsing and testing the date of 1999 April 30
The parsed day is Thu Apr 29 23:00:00 GMT+02:00 1999
The date formatted as yyyy-MM-dd is 1999-04-29
The above error doesn't exist when running the jdk 1.2 pre-release-v1 on
the same system !!!
[root@teo eforie]# java -version
java version "1.2"
Classic VM (build Linux_JDK_1.2_pre-release-v1, native threads, sunwjit)
[root@teo eforie]# java april30
Parsing and testing the date of 1999 April 29
The parsed day is Thu Apr 29 00:00:00 GMT+03:00 1999
The date formatted as yyyy-MM-dd is 1999-04-29
Parsing and testing the date of 1999 April 30
The parsed day is Fri Apr 30 00:00:00 GMT+03:00 1999
The date formatted as yyyy-MM-dd is 1999-04-30
Please note the differences (GMT+02) <-> (GMT+03) between them.
The program has been tested on the same machine (but different users teo
& root)
Here comes the test program!
//program april30.java
//--------------------
import java.text.*;
import java.util.*;
public class april30 {
private Date thedate;
private SimpleDateFormat sdf;
public april30(String s) {
sdf = new SimpleDateFormat("yyyy-MM-dd");
sdf.setLenient(false);
try {
thedate = sdf.parse(s);
} catch (ParseException pe) {
System.out.println("An exception occured trying to parse
string "+s);
}
}
public String toISO() {
return sdf.format(thedate);
}
public String toString() {
return thedate.toString();
}
public static void main(String[] argv) {
System.out.println("Parsing and testing the date of 1999 April 29");
april30 a1 = new april30("1999-4-29");
System.out.println("The parsed day is "+a1.toString());
System.out.println("The date formatted as yyyy-MM-dd is "+a1.toISO());
System.out.println("");
System.out.println("Parsing and testing the date of 1999 April 30");
april30 a2 = new april30("1999-4-30");
System.out.println("The parsed day is "+a2.toString());
System.out.println("The date formatted as yyyy-MM-dd is "+a2.toISO());
System.exit(0);
}
}
//------------------------------
I will REALLY need jdk 1.1.7 to work corectly because some of my
customers are already using java applications with this bug :-(
And we have only 8 days left ...
Best regards,
--
Constantin Teodorescu
FLEX Consulting Braila, ROMANIA
import java.text.*;
import java.util.*;
public class april30 {
private Date thedate;
private SimpleDateFormat sdf;
public april30(String s) {
sdf = new SimpleDateFormat("yyyy-MM-dd");
sdf.setLenient(false);
try {
thedate = sdf.parse(s);
} catch (ParseException pe) {
System.out.println("An exception occured trying to parse
string "+s);
}
}
public String toISO() {
return sdf.format(thedate);
}
public String toString() {
return thedate.toString();
}
public static void main(String[] argv) {
System.out.println("Parsing and testing the date of 1999 April 29");
april30 a1 = new april30("1999-4-29");
System.out.println("The parsed day is "+a1.toString());
System.out.println("The date formatted as yyyy-MM-dd is "+a1.toISO());
System.out.println("");
System.out.println("Parsing and testing the date of 1999 April 30");
april30 a2 = new april30("1999-4-30");
System.out.println("The parsed day is "+a2.toString());
System.out.println("The date formatted as yyyy-MM-dd is "+a2.toISO());
System.exit(0);
}
}
