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Groups > comp.lang.java.programmer > #14225

Re: my java is broken !

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On 04/29/2012 04:06 PM, Arved Sandstrom wrote:
> On 12-04-29 07:21 PM, bilsch wrote:
>> On 04/29/2012 07:25 AM, Joshua Cranmer wrote:
>>> On 4/29/2012 7:13 AM, bilsch wrote:
>>>> I wrote a loop to read a 26000 character text file NVRAM.TXT into a
>>>> character array. It worked fine. The program is listed below. It has
>>>> only 24 lines. Today when I run it, it has weird errors referenced to
>>>> line numbers 2442, 2685 and 1620. When I click on those error messages
>>>> it shows lines in a completely different program - a program that I
>>>> never wrote for sure. I saved the file with a different name and it runs
>>>> fine with that name - no errors. The file name that has the problem is
>>>> Nvj5. That is the file selected and displayed when I click RUN FILE. It
>>>> is the file listed below. Even though it is selected and displayed when
>>>> I click RUN FILE my system is running some other huge file instead. Has
>>>> anyone ever heard of a problem like this?
>>>
>>> When you refuse to mention error messages, the answer becomes "I have no
>>> clue."
>>>
>>> It would also help to know what the command line is that is causing it.
>>> It could be that your IDE is buggy, too (since it sounds like you rely
>>> on a specific IDE feature).
>>>
>> I can't tell you the error messages now because I deleted the offending
>> file - so can't generate errors anymore.  It seems the error messages
>> are irrelevant since they point to lines in some large unknown program.
>
> Your system is not "running" some other "file", not in the sense that
> you think. Your Java source files are compiled into .class files, these
> are loaded up into memory as required, and broadly speaking it's the
> bytecodes in these class files that get executed ("run"). The first
> application code to execute is the proper main() method in your main
> class...like Nvj5.main(). Since you are using standard library code
> also, like FileInputStream, code in those classes - and in the classes
> that FileInputStream uses, and so on and so on - also gets executed.
>
> That mysterious huge file is a standard library class that your code
> needs to work. It's not irrelevant. A high percentage of the time when
> you write buggy code the errors start in library code, not in your own
> code. You need to look at the entire stack. You will notice that
> somewhere in the stack are line references to your own code also.
>
> You deleted and renamed *which* files exactly? Also, you have a class
> Nvj5 but a corresponding source file "Nvj5.java".  You'll find that
> people understand you better if you differentiate between data files
> (like NVRAM.TXT) and source files (like Nvj5.java).
>
> Are you saying that you renamed class Nvj5 in source file Nvj5.java to
> class Pwll12 in source file Pwll12.java, say, and ever since your
> program has run like a charm? That seems highly unlikely. In fact that's
> astronomically unlikely.
>
I copied the source from the offending file then I deleted the entire 
project folder - everything.  Then I created a new project and a new 
blank .java file and pasted the copied source in that new file.  I used 
new names for the new file and folder.  Once I did that the source(in 
the new file) ran without a glitch.  I tested it several times over a 
period of days and it always worked.  NOW, TODAY THE NEW FILE HAS GOTTEN 
THE SAME PROBLEM JUST LIKE THE OLD FILE  I have the error information 
pasted below along with the source, also below. The error lines are in a 
different file than the one I am running - now named Nvr1.java..

> What IDE or programming text editor are you using? How many "main"
> classes are currently available in your workspace? When you tried that
> failing run did you see any console output at all?
>
I am using NetBeans to do exerything.

> AHS

THE ERROR INFORMATION:
run:
Exception in thread "main" java.lang.VerifyError: Constructor must call 
super() or this() before return in method Nvr1.<init>()V at offset 0
	at java.lang.Class.getDeclaredMethods0(Native Method)
	at java.lang.Class.privateGetDeclaredMethods(Class.java:2442)
	at java.lang.Class.getMethod0(Class.java:2685)
	at java.lang.Class.getMethod(Class.java:1620)
	at sun.launcher.LauncherHelper.getMainMethod(LauncherHelper.java:488)
	at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:480)
Java Result: 1
BUILD SUCCESSFUL (total time: 4 seconds)


THE SOURCE:
import java.io.*;

public class Nvr1 {

     public static void main(String[] args){

         try {
         FileInputStream file = new FileInputStream("NVRAM.TXT");
         char[] nvchr = new char [30000];
         int fin = 1;
         int count = 1;
             while (fin != -1) {
              fin = file.read();
              nvchr[count] = (char) fin;
              System.out.print(nvchr[count]);
              count++;
             }
         System.out.println("Bytes read : " + count);
         file.close();
     } catch (IOException e){
         System.out.println("Could not read file");
     }

     }
}

TIA.   Bill S.

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Thread

my java is broken ! bilsch <king621@comcast.net> - 2012-04-29 05:13 -0700
  Re: my java is broken ! bilsch <king621@comcast.net> - 2012-04-29 05:36 -0700
    Re: my java is broken ! Roedy Green <see_website@mindprod.com.invalid> - 2012-04-29 07:05 -0700
  Re: my java is broken ! Joshua Cranmer <Pidgeot18@verizon.invalid> - 2012-04-29 09:25 -0500
    Re: my java is broken ! bilsch <king621@comcast.net> - 2012-04-29 15:21 -0700
      Re: my java is broken ! Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2012-04-29 20:06 -0300
        Re: my java is broken ! bilsch <king621@comcast.net> - 2012-05-03 15:03 -0700
          Re: my java is broken ! Lew <lewbloch@gmail.com> - 2012-05-03 16:05 -0700
            Re: my java is broken ! Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2012-05-03 20:44 -0300
              Re: my java is broken ! bilsch <king621@comcast.net> - 2012-05-03 22:38 -0700
                Re: my java is broken ! Lew <lewbloch@gmail.com> - 2012-05-04 06:43 -0700
                Re: my java is broken ! Andreas Leitgeb <avl@gamma.logic.tuwien.ac.at> - 2012-05-04 14:07 +0000
                Re: my java is broken ! Leif Roar Moldskred <leifm@dimnakorr.com> - 2012-05-04 09:11 -0500
                Re: my java is broken ! bilsch <king621@comcast.net> - 2012-05-04 15:06 -0700
                Re: my java is broken ! Martin Gregorie <martin@address-in-sig.invalid> - 2012-05-04 23:06 +0000
                Re: my java is broken ! bilsch <king621@comcast.net> - 2012-05-05 15:03 -0700
                Re: my java is broken ! bilsch <king621@comcast.net> - 2012-05-05 15:04 -0700
                Re: my java is broken ! Lew <lewbloch@gmail.com> - 2012-05-04 17:04 -0700
                Re: my java is broken ! bilsch <king621@comcast.net> - 2012-05-05 15:30 -0700
                Re: my java is broken ! markspace <-@.> - 2012-05-05 15:58 -0700
                Re: my java is broken ! Lew <noone@lewscanon.com> - 2012-05-05 22:37 -0700
                Re: my java is broken ! Leif Roar Moldskred <leifm@dimnakorr.com> - 2012-05-04 19:48 -0500
                Re: my java is broken ! Martin Gregorie <martin@address-in-sig.invalid> - 2012-05-05 15:02 +0000
                Re: my java is broken ! bilsch <king621@comcast.net> - 2012-05-05 15:26 -0700
                Re: my java is broken ! Martin Gregorie <martin@address-in-sig.invalid> - 2012-05-05 22:57 +0000
                Re: my java is broken ! Lew <noone@lewscanon.com> - 2012-05-05 22:41 -0700

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