Java IO stream randomaccessfile multi-threaded download

http://www.verejava.com/?id=16994721196019

Package Com.randomaccessfile;import Java.io.file;import Java.io.fileinputstream;import Java.io.filenotfoundexception;import Java.io.ioexception;import Java.io.inputstream;import        Java.io.randomaccessfile;public class testthreaddownload{public static void Main (string[] args) {try            {InputStream is=new FileInputStream (New File ("res/raf/water.jpg"));                        Long contentlength=is.available ();            Create a file with the same size as the file you want to download Randomaccessfile raf=new randomaccessfile ("res/raf/new2.jpg"), "RW";            Raf.setlength (contentlength);            Raf.close ();            Calculate how long earchlength=contentlength/5 to download for each segment;            if (contentlength%5!=0) {earchlength++;            } for (int i=0;i<5;i++) {new Thread (new Downloadthread (Earchlength,i)). Start ();  }} catch (FileNotFoundException e) {e.printstacktrace ();      } catch (IOException e) {e.printstacktrace ();        }} Static Class Downloadthread implements Runnable {private long earchlength;                private int i;            Public Downloadthread (Long earchlength,int i) {this.earchlength=earchlength;        This.i=i;            } @Override public void Run () {Randomaccessfile raf=null;                try {inputstream is=new fileinputstream (New File ("res/raf/water.jpg"));                Long skip=earchlength*i;                Is.skip (skip);                RAF = new Randomaccessfile (New File ("Res/raf/new2.jpg"), "RW");                Raf.seek (skip);                int l=0;                System.out.println (Raf.getfilepointer ()); while ((Raf.getfilepointer () <=skip+earchlength) && ((L=is.read ())!=-1)) {RAF.WR                ITE (l); }} catch (Filenotfoundexception e) {e.printstacktrace ();            } catch (IOException e) {e.printstacktrace ();                } finally {try {raf.close ();                } catch (IOException e) {e.printstacktrace (); }            }                    }            }}

http://www.verejava.com/?id=16994721196019

Java IO stream randomaccessfile multi-threaded download