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Newbie has simple question

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  Newbie has simple question bilsch <king621@comcast.net> - 2012-05-02 05:10 -0700
    Re: Newbie has simple question bilsch <king621@comcast.net> - 2012-05-02 05:39 -0700
    Re: Newbie has simple question Silvio Bierman <silvio@moc.com> - 2012-05-02 14:43 +0200
      Re: Newbie has simple question bilsch <king621@comcast.net> - 2012-05-02 05:57 -0700
        Re: Newbie has simple question Silvio Bierman <silvio@moc.com> - 2012-05-02 15:07 +0200
          Re: Newbie has simple question bilsch <king621@comcast.net> - 2012-05-02 06:36 -0700
            Re: Newbie has simple question Silvio Bierman <silvio@moc.com> - 2012-05-02 16:43 +0200
    Re: Newbie has simple question Lew <lewbloch@gmail.com> - 2012-05-02 11:07 -0700
      Re: Newbie has simple question bilsch <king621@comcast.net> - 2012-05-02 12:57 -0700
        Re: Newbie has simple question Lew <lewbloch@gmail.com> - 2012-05-02 14:21 -0700

#14128 — Newbie has simple question

I wrote a loop that reads a text file (NVRAM.TXT) and stores it in a big 
character array and prints it out.  It works fine. Just for the heck of 
it I tried to break it into two files: one that does the reading and the 
creation of the array, and another (with main) that prints out the first 
10 characters of the array.  It doesn't work.  There's something wrong 
with how I reference the array in the main program.  The two files are 
shown below, along with the error message that is generated. The 
statement causing the error is:

System.out.print(bstr.nvchr[n]);

Please tell me how to make it work (if possible).  Here are the two files:

public class NvrWork {
     public static void main(String[] args) {
         int n;
         BigString bstr = new BigString();
         for (n = 1; n < 10; n++) {

         System.out.print(bstr.nvchr[n]);

             }
         }
     }

public class BigString {

         public BigString() {
         int fin = 1;
         int count = 1;
         try {
         FileInputStream file = new FileInputStream("NVRAM.TXT");
         char[] nvchr = new char [30000];

             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");
     }

}
}

OUTPUT:

run:
Bytes read : 26017
Exception in thread "main" java.lang.RuntimeException: Uncompilable 
source code - Erroneous tree type: <any>
	at NvrWork.main(NvrWork.java:9)
Java Result: 1
BUILD SUCCESSFUL (total time: 3 seconds)

TIA.   Bill S.

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#14130

On 05/02/2012 05:22 AM, Stefan Ram wrote:
> bilsch<king621@comcast.net>  writes:
>> statement causing the error is:
>> System.out.print(bstr.nvchr[n]);
>
>    This requires »nvchr« to be a field of »bstr« (»BigString«),
>    but »nvchr« is not a field of »bstr« (»BigString«). It is only
>    a local variable used in its constructor.
>

I don't understand what makes it different than the variables fin and 
count which are both printable from the main program.  Is there no way 
to make it work?  What does it mean to be a 'field'?  Could you tell me 
more?

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#14131

On 05/02/2012 02:10 PM, bilsch wrote:
> I wrote a loop that reads a text file (NVRAM.TXT) and stores it in a big
> character array and prints it out. It works fine. Just for the heck of
> it I tried to break it into two files: one that does the reading and the
> creation of the array, and another (with main) that prints out the first
> 10 characters of the array. It doesn't work. There's something wrong
> with how I reference the array in the main program. The two files are
> shown below, along with the error message that is generated. The
> statement causing the error is:
>
> System.out.print(bstr.nvchr[n]);
>
> Please tell me how to make it work (if possible). Here are the two files:
>
> public class NvrWork {
> public static void main(String[] args) {
> int n;
> BigString bstr = new BigString();
> for (n = 1; n < 10; n++) {
>
> System.out.print(bstr.nvchr[n]);
>
> }
> }
> }
>
> public class BigString {
>
> public BigString() {
> int fin = 1;
> int count = 1;
> try {
> FileInputStream file = new FileInputStream("NVRAM.TXT");
> char[] nvchr = new char [30000];
>
> 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");
> }
>
> }
> }
>
> OUTPUT:
>
> run:
> Bytes read : 26017
> Exception in thread "main" java.lang.RuntimeException: Uncompilable
> source code - Erroneous tree type: <any>
> at NvrWork.main(NvrWork.java:9)
> Java Result: 1
> BUILD SUCCESSFUL (total time: 3 seconds)
>
> TIA. Bill S.



You have quite some nerve to abandon an earlier thread and simply start 
a new one.

Silvio Bierman

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#14132

I didn't abandon the previous thread. It was finished.  This is a new 
question and wouldn't even belong in the previous thread.

>
>
>
> You have quite some nerve to abandon an earlier thread and simply start
> a new one.
>
> Silvio Bierman

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#14133

On 05/02/2012 02:57 PM, bilsch wrote:
> I didn't abandon the previous thread. It was finished. This is a new
> question and wouldn't even belong in the previous thread.
>
>>
>>
>>
>> You have quite some nerve to abandon an earlier thread and simply start
>> a new one.
>>
>> Silvio Bierman
>

You obviously have little experience posting to newsgroups.

First of all, do not top-post. Put your replies at the bottom om the 
message you are replying to, optionally trimming parts of the original 
message. This makes it easier for other people to keep track of the 
discussions.

Secondly, a thread you start is not "finished" because you think that 
responses are less than helpful and you have lost interest.
If you have resolved your problem, with or without the help of other 
thread participants, you are supposed to make such known by posting a 
closing message telling people that, and how, you have resolved the 
issue. Thanking everyone for their responses at the same time is not 
optional.

You are very lucky to have experienced and highly skilled people 
available to help you with your programming issues. Handle them with the 
grace they deserve and they will continue to be of invaluable help to you.

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#14134

I told people I had deleted the offending file - therefore I couldn't 
provide the  error information.  Deleting the file ended the problem - 
which I said.  I've been posting in news groups since before you got out 
of grade school.



> Secondly, a thread you start is not "finished" because you think that
> responses are less than helpful and you have lost interest.
> If you have resolved your problem, with or without the help of other
> thread participants, you are supposed to make such known by posting a
> closing message telling people that, and how, you have resolved the
> issue. Thanking everyone for their responses at the same time is not
> optional.

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#14136

On 05/02/2012 03:36 PM, bilsch wrote:
> I told people I had deleted the offending file - therefore I couldn't
> provide the error information. Deleting the file ended the problem -
> which I said. I've been posting in news groups since before you got out
> of grade school.
>

All your messages in the thread where responded to by others who did not 
understand that the topic was closed. Arveds response to this particular 
message contained a number of explicit questions to you that you have 
rudely ignored.

I was out of grade school (in fact, close to graduating from university) 
when NNTP was invented so that makes your claim unlikely.

Being inexperienced could have been considered an excuse for being rude. 
Now you are just that.

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#14139

bilsch wrote:
> I wrote a loop that reads a text file (NVRAM.TXT) and stores it in a big 
> character array and prints it out.  It works fine. Just for the heck of 
> it I tried to break it into two files: one that does the reading and the 
> creation of the array, and another (with main) that prints out the first 

Files don't do reading and printing.

Programs do.

> 10 characters of the array.  It doesn't work.  There's something wrong 
> with how I reference the array in the main program.  The two files are 
> shown below, along with the error message that is generated. The 
> statement causing the error is:
> 
> System.out.print(bstr.nvchr[n]);
> 
> Please tell me how to make it work (if possible).  Here are the two files:
> 
> public class NvrWork {
>      public static void main(String[] args) {
>          int n;
>          BigString bstr = new BigString();

As Stefan told you, 'bstr' is a local variable. Look up "local variable". Its scope is limited to the 'main()' method of the 'NvrWork' class and is not accessible to another class. Look up "access" as it applies to Java variables, methods and members.

>          for (n = 1; n < 10; n++) {
> 
>          System.out.print(bstr.nvchr[n]);

'nvchr' is not a member variable of the 'BigString' type, much less an accessible one.

Read the Java tutorials.

>              }
>          }
>      }
> 
> public class BigString {
> 
>          public BigString() {
>          int fin = 1;
>          int count = 1;
>          try {
>          FileInputStream file = new FileInputStream("NVRAM.TXT");

Don't do all the work in the constructor. The constructor should only construct, not perform the major work.

>          char[] nvchr = new char [30000];
> 
>              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");
>      }
> 
> }
> }
> 
> OUTPUT:
> 
> run:
> Bytes read : 26017
> Exception in thread "main" java.lang.RuntimeException: Uncompilable 
> source code - Erroneous tree type: <any>
> 	at NvrWork.main(NvrWork.java:9)
> Java Result: 1
> BUILD SUCCESSFUL (total time: 3 seconds)

You need to read the Java tutorials.

-- 
Lew

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#14144

On 05/02/2012 11:07 AM, Lew wrote:
> bilsch wrote:
>> I wrote a loop that reads a text file (NVRAM.TXT) and stores it in a big
>> character array and prints it out.  It works fine. Just for the heck of
>> it I tried to break it into two files: one that does the reading and the
>> creation of the array, and another (with main) that prints out the first
>
> Files don't do reading and printing.
>
> Programs do.
>
>> 10 characters of the array.  It doesn't work.  There's something wrong
>> with how I reference the array in the main program.  The two files are
>> shown below, along with the error message that is generated. The
>> statement causing the error is:
>>
>> System.out.print(bstr.nvchr[n]);
>>
>> Please tell me how to make it work (if possible).  Here are the two files:
>>
>> public class NvrWork {
>>       public static void main(String[] args) {
>>           int n;
>>           BigString bstr = new BigString();
>
> As Stefan told you, 'bstr' is a local variable. Look up "local variable". Its scope is limited to the 'main()' method of the 'NvrWork' class and is not accessible to another class. Look up "access" as it applies to Java variables, methods and members.
>
>>           for (n = 1; n<  10; n++) {
>>
>>           System.out.print(bstr.nvchr[n]);
>
> 'nvchr' is not a member variable of the 'BigString' type, much less an accessible one.
>
> Read the Java tutorials.
>
>>               }
>>           }
>>       }
>>
>> public class BigString {
>>
>>           public BigString() {
>>           int fin = 1;
>>           int count = 1;
>>           try {
>>           FileInputStream file = new FileInputStream("NVRAM.TXT");
>
> Don't do all the work in the constructor. The constructor should only construct, not perform the major work.
>
>>           char[] nvchr = new char [30000];
>>
>>               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");
>>       }
>>
>> }
>> }
>>
>> OUTPUT:
>>
>> run:
>> Bytes read : 26017
>> Exception in thread "main" java.lang.RuntimeException: Uncompilable
>> source code - Erroneous tree type:<any>
>> 	at NvrWork.main(NvrWork.java:9)
>> Java Result: 1
>> BUILD SUCCESSFUL (total time: 3 seconds)
>
> You need to read the Java tutorials.
>

Thank you.  I'm not sure where the tutorials are.  Do you have a link?

TIA.  Bill S.

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#14150

bilsch wrote:
> Lew wrote:
>> You need to read the Java tutorials.
>>
> 
> Thank you.  I'm not sure where the tutorials are.  Do you have a link?

<http://lmgtfy.com/?q=Java+tutorials>

-- 
Lew

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