SimpleDateFormat does not handle leading blanks for HHmmss format

[25884]

Hi,

I came accross a piece of code :


import java.util.*;
import java.io.*;
import java.text.*;

public class SDFTest{
public static void main(String[] args) {
try{
System.out.println("\"102030\" --> " + getTime("102030"));
System.out.println("\"002030\" --> " + getTime("002030"));
System.out.println("\" 12030\" --> " + getTime(" 12030"));
System.out.println("\" 2030\" --> " + getTime(" 2030"));
System.out.println("\" \" --> " + getTime(" "));
}catch(Exception e){
e.printStackTrace();
}
}

private static String getTime(String time_str){
SimpleDateFormat sdf = new SimpleDateFormat("HHmmss", new Locale("ja", ""));
ParsePosition pp = new ParsePosition(0);
sdf.setLenient(false);
Date date = sdf.parse(time_str, pp);
return sdf.format(date);
}
}

The output from this code using java 1.4 is as follows

"102030" --> 102030
"002030" --> 002030
" 12030" --> 012030
java.lang.NullPointerException
at java.util.Calendar.setTime(Calendar.java:1032)
at java.text.SimpleDateFormat.format(SimpleDateFormat.java:785)
at java.text.SimpleDateFormat.format(SimpleDateFormat.java:778)
at java.text.DateFormat.format(DateFormat.java:314)
at testSimpleDateFormat.getTime(testSimpleDateFormat.java:23)
at testSimpleDateFormat.main(testSimpleDateFormat.java:11)

So, with a string like " 2030", I get a null pointer exception. Is the string format incorrect for the pattern "HHmmss" ?

 

[Diancecht]

It shows the output for 2030 with 1.4 and 1.5 for me and shows the error when parsing the empty date.

Cheers,
Dian

 

[sedj]

Why not just trim() your date string before passing it to the formatter ?

--------------------------------------------------
Free Java/J2EE Database Connection Pooling Software

http://www.primrose.org.uk

 

[25884]

Hi,

What I want " 2030" to show is 002030, there are 2 blanks in the string " 2030". It should mean 20 minutes 30 seconds.

If I remove the empty date then also I get an NPE.

The question is, when a format like "12030" results in 012030, a format like " 2030" [2 blanks] should result in 002030, but it actually results in NPE. So the HH pattern parsing is incorrect.

Is this string format " 2030" [2 blanks] correct?

The documentation says H should have a value from 0-23, but does not talk about blanks.


Thanks,
Sonali

 

[sedj]

If a two spaces always means it should be two zeros, then :

String s = " 002030";
s = s.replaceAll(" ", "0");

--------------------------------------------------
Free Java/J2EE Database Connection Pooling Software

http://www.primrose.org.uk

 

[Diancecht]

I don't think you need to do that, it works for me as is now.

Cheers,
Dian