Question

I am facing a strange issue. My code runs just fine from Netbeans or cmd with

java -jar MP2.jar

but when I try to run it from the .bat or .cmd

"%JAVA_HOME%"\bin\java -jar .. \dist\MP2.jar > test_mp2_out.txt

I get an error in my text file

DataIn\nrmavg.txt (The System cannot find the path specified)

or a null pointer exception at the line I have new FileReader(nrmavg.txt)

I can provide more code if needed, but I think this may be a windows problem.
Any ideas?

Answer 1

I think FileReader(“nrmavg.txt”) won’t be looking for a file inside .jar, just a current directory. Could you try using something like this instead?

InputStream is = MP2.class.getResourceAsStream("nrmavg.txt") ;
BufferedReader br = new BufferedReader(new InputStreamReader(is));