asked on

a simple error

i read a file to an integer array but when i want to write it

like this;

// here i read "b.raw" file

try {
                        InputStream is = new FileInputStream("b.raw");
                        byte[] bDizi = new byte[640];
                        int okunanByteSayisi ;
                        while( (okunanByteSayisi = is.read(bDizi)) != -1 ) {
                              for(int i=0; i<okunanByteSayisi; i++) {
            int      so = bDizi[i];
                                    System.out.println(bDizi[i] ); // here bDizi doesnt resolved
                              }

                        }
                        is.close();// baglantiyi kapat

                  } catch(IOException e) {
                        System.err.println(e);
                  }

// here i write a.raw file but the bDizi cannat be resolved.

Why??

dervisakyuz

ASKER

try {
InputStream is = new FileInputStream("b.raw");
byte[] bDizi = new byte[640];
int okunanByteSayisi ;
while( (okunanByteSayisi = is.read(bDizi)) != -1 ) {
for(int i=0; i<okunanByteSayisi; i++) {
int so = bDizi[i];
System.out.println(bDizi[i] ); //not here
}

}
is.close();// baglantiyi kapat

} catch(IOException e) {
System.err.println(e);
}

try {

                               int okunanByteSayisi ;
                               fos = new FileOutputStream("b.raw"); // dosyaya baglan
                               for( int i=0;i<okunanByteSayisi;i++) {


                                     fos.write(bDizi); // here bDizi cannot resolved
                               }
                         } catch (IOException exIo) {
                               System.err.println("Hata Olustu:"+exIo);
                         } finally {
                                try {
                                     fos.close(); // baglantiyi kapa
                               } catch (IOException exClose) {
                                     System.err.println("Kapatmada sorun var:"+exClose);
                               }
                         }


              }

hoomanv

InputStream is = new FileInputStream("b.raw");
fos = new FileOutputStream("b.raw");

why are you reading and writting to the same file ?
you told that the output would be written to "a.raw"

hoomanv

also the write portion of your code does not correspond with the read part

// read
// you are reading the entire file contents, each time filling the array with new data discarding the previous read data

      byte[] bDizi = new byte[640];
      int okunanByteSayisi ;
      while( (okunanByteSayisi = is.read(bDizi)) != -1 ) {
            for(int i=0; i<okunanByteSayisi; i++) {
                  int so = bDizi[i];
                  System.out.println(bDizi[i]);
            }
      }

// write
// you are writing only the last read array, okunanByteSayisi times

      for( int i=0; i<okunanByteSayisi; i++) {
            fos.write(bDizi);
      }

dervisakyuz

ASKER

i want to copy b.raw to a.raw but readşng and again writing them

could u help me?

hoomanv

do you need only read b.raw and copy it exactly to a.raw ?

dervisakyuz

ASKER

i mean that both using reading and writing i want to copy b.raw to a.raw.

pls help me

dervisakyuz

ASKER

yes but a.raw not exist, we will write(create) it.

ASKER CERTIFIED SOLUTION

hoomanv

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dervisakyuz

ASKER

is there any way to copy exactly not same.

some missing bytes etc. i need sth like this.

the file i have copied is a sound file.

i will show "a.raw" to my teacher as here is the echo cancelled file. :)

hoomanv

you need read the entire file,parse it, make the changes in memory, and then write it to output.
you should be familiar with sound file structure