Datainputstream (binary input stream) and dataoutputstream binary output stream (Note: In is input from local files to programs, and out is output from programs to local files)

// Remember the data type that is used for output,

// For example, DOS. writeint (100); write, read: DIS. readutf () sometimes has unexpected errors, so you must always remember what data type is used for data type output reading.

 

// Datainputstream (binary input stream)

Public class datainputstreamdemo {

// Binary stream (read operation)

Public static void main (string [] ARGs ){

Fileinputstream FCM = NULL;

Datainputstream Dis = NULL;

Try {

FCM = new fileinputstream ("CBA. bin ");

Dis = new datainputstream (FCM );

// Read the string

System. Out. println (DIS. readutf ());

// Read integer

System. Out. println (DIS. readint ());

// Read bool type

System. Out. println (DIS. readboolean ());

} Catch (filenotfoundexception e ){

// Todo auto-generated Catch Block

E. printstacktrace ();

} Catch (ioexception e ){

// Todo auto-generated Catch Block

E. printstacktrace ();

} Finally {

Try {

Dis. Close ();

FCM. Close ();

} Catch (ioexception e ){

// Todo auto-generated Catch Block

E. printstacktrace ();

}

}

}

}

 

// Dataoutputstream binary output stream

Public class dataoutputstreamdemo {
// Binary stream: Applicable to binary files
/**
* Steps for using a binary stream:
* 1. Create a byte stream
* 2. Create a binary stream
* 3. Perform read/write operations
* 4. Close the stream
*/
// For binary streams, note that the data written and read must be consistent (data type and sequence); otherwise, the data read may be incorrect.
// Binary stream (write operation)
Public static void main (string [] ARGs ){

Fileoutputstream Fos = NULL;
Dataoutputstream dos = NULL;
Try {
// 1. Create a byte stream
Fos = new fileoutputstream ("CBA. bin ");
// 2. Create a binary stream
DOS = new dataoutputstream (FOS );
// 3. write operation
Dos. writeutf ("ABC"); // write the UTF-8 encoded string to the stream.
Dos. writeint (100 );
Dos. writeboolean (true );
System. Out. println ("Write successful! ");

} Catch (filenotfoundexception e ){
// Todo auto-generated Catch Block
E. printstacktrace ();
} Catch (ioexception e ){
// Todo auto-generated Catch Block
E. printstacktrace ();
} Finally {

Try {
// 4. Close the stream
Dos. Close ();
FOS. Close ();
} Catch (ioexception e ){
// Todo auto-generated Catch Block
E. printstacktrace ();
}
}

}

}