How to handle a NullPointerException

[Dimiter Stamenov <pamir at abv dot bg>]

Hi experts,

I have successfully compiled a Java project with gcj from Java source, but when start the compiled executable, a java.lang.NullPointerException is thrown without a stack trace.

If I could know what is the reason it, I may eventually be able to modify the source to avoid it, but how to know that? When I run the program with the standard JVM, there is no problem.

Everything I know is the class and high-level method in which it happens.

The system is Windows XP with GCJ 4.2 from http://www.thisiscool.com/gcc_mingw.htm.

The compile command is:
gcj --main=Universal -o universal.exe -g -s @files.list

The output when start the universal.exe is:
java.lang.NullPointerException
   <<No stacktrace available>>

The output from gdb is:
(gdb) run
Starting program: universal.exe
Loaded symbols for D:\WINDOWS\system32\ntdll.dll
Loaded symbols for D:\WINDOWS\system32\kernel32.dll
Loaded symbols for D:\WINDOWS\system32\advapi32.dll
Loaded symbols for D:\WINDOWS\system32\rpcrt4.dll
Loaded symbols for D:\WINDOWS\system32\msvcrt.dll
Loaded symbols for D:\WINDOWS\system32\user32.dll
Loaded symbols for D:\WINDOWS\system32\gdi32.dll
Loaded symbols for D:\WINDOWS\system32\ws2_32.dll
Loaded symbols for D:\WINDOWS\system32\ws2help.dll

Program received signal SIGSEGV, Segmentation fault.
0x00823916 in ?? ()


Could you suggest me what to do?

Thanks in advance
Dimitar