io-byte input stream-fileinputstream

io- byte input stream -fileinputstream

java.io

Class FileInputStream

public class FileInputStream extends InputStream

FileInputStream Gets the input bytes from a file in the file system. Which files are available depends on the host environment.

The FileInputStream is used to read raw byte streams such as data. To read a character stream, consider using filereader.

22-io- copying pictures -copypic

 package day20.io.p2.copypic;     import java.io.BufferedInputStream;     import java.io.BufferedOutputStream;    import  java.io.fileinputstream;    import java.io.fileoutputstream;     import java.io.ioexception;         public class  copypictest {    private static fileinputstream fis;     private static FileOutputStream fos;          public static void main (String[] args)  throws IOException {         copypic4 ();          }         PUBLIC STATIC VOID COPYPIC4 ()  throws  Ioexception {        //buffer array in the byte stream buffer is possible, you can also use the Flush method, the buffer array of data brush out,      The    //flush method is valid in the buffer, and if the file is manipulated directly, Fos.flush () is ineffective          fis = new fileinputstream ("temp\\0.jpg");         Fos = new fileoutputstream ("temp\\4.jpg");         Bufferedinputstream bufis =new bufferedinputstream (FIS);         bufferedoutputstream bufos =new bufferedoutputstream (FOS);         byte[] byt = new byte[1024];         while ((Bufis.read (byt))!=-1) {             bufos.write (byt);             bufos.flush ();      &Nbsp;  }        bufos.close ();         bufis.close ();    }    /*      * COPYPIC3 () This method is not available and is inefficient.      */    PUBLIC STATIC VOID COPYPIC3 ()   throws ioexception {        fis = new  FileInputStream ("temp\\0.jpg");        fos = new  FileOutputStream ("temp\\3.jpg");        int by = 0;         while ((By = fis.read ())!=-1) {         fos.write (by);}         //disk tunnels running in the same place can be bad.         }                 public static void copypic2 ()  throws  Ioexception {        fis = new fileinputstream (" Temp\\0.jpg ");         fos = new fileoutputstream (" Temp\ \2.jpg ");        bufferedinputstream bufis =new  Bufferedinputstream (FIS);        bufferedoutputstream bufos  =new bufferedoutputstream (FOS);        int by = 0;         while ((By = bufis.read ())!=-1) {             bufos.write (by);         }        bufos.close ();         bufis.close ();      }         /*     *   Copy a picture      * 1. Both read and write,      * 2. or non-text data       *     both pictures and text, using the word stream      */     public static void copypic1 ()  throws IOException {         //   1. Identifying data sources and data purposes          Fis = new fileinputstream ("temp\\0.jpg");         fos  = new fileoutputstream ("temp\\1.jpg");         //2. Custom Buffers         byte[] buf = new byte[1024];         int len = 0;         while ((LEN =&NBsp;fis.read (BUF))!=-1) {            fos.write (buf, 0,len);        }         Fos.close ();         fis.close ();     } }

io-byte input stream-fileinputstream