Black Horse programmer--22, byte stream inputstream,outputstream, byte throttle buffer technology, Bufferedinputstream,bufferedoutputstream

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Black Horse programmer--22, byte stream inputstream,outputstream, byte throttle buffer technology, Bufferedinputstream,bufferedoutputstream

/*

The relevant explanation of the byte stream:

InputStream (read operation), OutputStream (write operation)

Similar to the previous character stream in usage

*/

Import java.io.*;class ioliou13{public static void Main (string[] args) throws IOException {//              Method ();                               Method1 (); } public static void Method () throws IOException {FileInputStream fis=new fileinputstre       AM ("f:\\yuyuyu.txt");       int i=0;                   Char ch= ' 0 ';                        while ((I=fis.read ())!=-1) {ch= (char) i;                             SOC (CH);                    /* Since this is a byte-stream object operation, only numbers and letters can be seen here at this time */         } fis.close (); } public static void Method1 () throws IOException {FileInputStream fis=new fileinputstr                      EAM ("F:\\yuyuyu.txt");                      int num=fis.available ();//Get the number of bytes Soc ("num=" +num); Byte[] B=new Byte[3];                      int i=0;                      char ch = ';                                  while ((I=fis.read (b))!=-1) {//ch= (char) i;                               Soc (new String (b,0,b.length));         This is to print out characters according to byte array B, so there is no need to force type conversion} fis.close (); } public static void Method2 () throws IOException {FileOutputStream fos=new fileoutputstr                     EAM ("F:\\yuyuyu.txt");                   Fos.write ("Kankan". GetBytes ());                            The GetBytes method is a string class that uses its own method to convert bytes/* bytes to the write stream without the Flush method because the byte is already the smallest operand.                  The byte write stream is written directly to the file.         */Fos.close ();                                   } public static void Soc (Object obj) {System.out.print (obj); }}

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/*

To copy a picture:

Select byte stream

Ideas:

1, byte read stream associated with target

2, byte write stream create picture file

3, cyclic reading and writing

4, close the resource

*/

Import java.io.*;class ioliou14{public static void Main (string[] args) {method2 ();             } public static void method () {FileInputStream fis=null;                   FileOutputStream Fos=null;                     try {fis=new FileInputStream ("f:\\ untitled 23.png");                   Fos=new FileOutputStream ("f:\\ untitled 23_copy.png");                   Byte[] B=new byte[1024];                   int i=0;                   while ((I=fis.read (b))!=-1) {fos.write (b,0,i);                            }} catch (IOException e) {                   throw new RuntimeException ("Problem copying picture");                                     } finally {try {                            Fis.close ();  }                          catch (IOException e) {throw n                             EW RuntimeException ("Fis.close (); a problem");                        } try {fos.close (); } catch (IOException E2) {throw new Runtime                                        Exception ("Fos.close (); a problem"); }}} Publ                   IC static void Method2 () {FileInputStream fis=null;                   FileOutputStream Fos=null;              try {fis=new FileInputStream ("f:\\ transcoding video \ Dead Zone 01.mp4");              Fos=new FileOutputStream ("f:\\ Death Zone 01_copy.mp4");              Byte[] B=new byte[1024];              int i=0; While((I=fis.read (b))!=-1)                                 {Fos.write (b,0,i);                            }} catch (IOException e) {                    throw new RuntimeException ("Replication Problem");                       } finally {try {fis.close (); } catch (IOException e) {T                      Hrow New RuntimeException ("Fis.close (); the problem");                } try {fos.close (); } catch (IOException E2) {throw new RuntimeException ("Fos.                 Close (); problem "); }}} public static void Soc (Object obj) {System.out.printl                   n (obj);     }} 

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/*

The byte stream also has its own buffer technology:

Bufferedinputstream

Bufferedoutputstream

The usage is almost the same as the character stream.

*/

Import java.io.*;class ioliou15{public static void Main (string[] args) throws IOException {                     Long Start=system.currenttimemillis ();                      Method ();                    Long End=system.currenttimemillis ();                            Soc ("time=" + (End-start)); } public static void Method () throws IOException {FileInputStream fis=new Fileinpu                   TStream ("f:\\ untitled 23.png");                   FileOutputStream fos=new FileOutputStream ("f:\\ untitled 23copy.png");                   Bufferedinputstream bis=new bufferedinputstream (FIS);                   Bufferedoutputstream bos=new bufferedoutputstream (FOS);                   int i=0;                            while ((I=bis.read ())!=-1) {bos.write (i);                  Here directly throw I in can, more convenient} bis.close ();                              Bos.close ();      } public static void Soc (Object obj) {System.out.println (obj); }}

Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.

Black Horse programmer--22, byte stream inputstream,outputstream, byte throttle buffer technology, Bufferedinputstream,bufferedoutputstream