How to get line no Exception occurred at?

[Harry]

I need to get hold of somehow the line no that an exception occurred at so
as to log it using log4j.

My ConversionPattern is set to -

log4j.appender.stdout.layout.ConversionPattern=%5p (%F:%L) - %m%n

but %L only shows the line no that log was called from.

Thought I'd cracked it when I noticed getStackTrace() method of exception
object BUT (notice the big but!), the app must work on 1.3 & getStackTrace()
wasn't introduced until 1.4.

Can I still somehow get hold of the StackTrace & retrieve the line no?

Thanks

harry

[Rolf Rosenbaum]

Try using a PrintWriter, like this:

try {

...

} catch (Exception exception) {
StringWriter stringWriter = new StringWriter();
String stackTrace = null;
exception.printStackTrace(new PrintWriter(stringWriter));

// get the stackTrace as String...
stackTrace = stringWriter.toString();

The line no is usually the found in line 2 of the stacktrace after "java:"
greets
Rolf
Harry wrote:

I need to get hold of somehow the line no that an exception occurred at so
as to log it using log4j.

My ConversionPattern is set to -

log4j.appender.stdout.layout.ConversionPattern=%5p (%F:%L) - %m%n

but %L only shows the line no that log was called from.

Thought I'd cracked it when I noticed getStackTrace() method of exception
object BUT (notice the big but!), the app must work on 1.3 & getStackTrace()
wasn't introduced until 1.4.

Can I still somehow get hold of the StackTrace & retrieve the line no?

Thanks

harry

[Harry]

Cheers Rolf!

"Rolf Rosenbaum" <[e-mail]> wrote in message
news:7A*********************@news.easynews.com...

Try using a PrintWriter, like this:

try {

...

} catch (Exception exception) {
StringWriter stringWriter = new StringWriter();
String stackTrace = null;
exception.printStackTrace(new PrintWriter(stringWriter));

// get the stackTrace as String...
stackTrace = stringWriter.toString();

The line no is usually the found in line 2 of the stacktrace after "java:"
greets
Rolf
Harry wrote:

I need to get hold of somehow the line no that an exception occurred at so as to log it using log4j.

My ConversionPattern is set to -

log4j.appender.stdout.layout.ConversionPattern=%5p (%F:%L) - %m%n

but %L only shows the line no that log was called from.

Thought I'd cracked it when I noticed getStackTrace() method of exception object BUT (notice the big but!), the app must work on 1.3 & getStackTrace() wasn't introduced until 1.4.

Can I still somehow get hold of the StackTrace & retrieve the line no?

Thanks

harry

[John]

Here is a second example as well :

http://www.javapractices.com/Topic78.cjp

Harry wrote:

I need to get hold of somehow the line no that an exception occurred at so
as to log it using log4j.

My ConversionPattern is set to -

log4j.appender.stdout.layout.ConversionPattern=%5 p (%F:%L) - %m%n

but %L only shows the line no that log was called from.

Thought I'd cracked it when I noticed getStackTrace() method of exception
object BUT (notice the big but!), the app must work on 1.3 & getStackTrace()
wasn't introduced until 1.4.

Can I still somehow get hold of the StackTrace & retrieve the line no?

Thanks

harry