Java File replication

1.

public static long Forjava (File f1,file F2) throws exception{  
   long time=new Date (). Gettim E ();  
   int length=2097152;  
    fileinputstream in=new FileInputStream (F1);  
    fileoutputstream out=new fileoutputstream (F2);  
   byte[] buffer=new byte[length];  
   while (true) {  
     int ins=in.read (buffer);  
    if (ins==-1) {  
       in.close ();  
      out.flush ();  
       out.close ();  
     return new Date (). GetTime ()-time;   
    }else 
      out.write (buffer,0,ins);   
   }  
 }

2.

public static long Fortransfer (File f1,file F2) throws exception{
Long Time=new Date (). GetTime ();
int length=2097152;
FileInputStream in=new FileInputStream (F1);
FileOutputStream out=new FileOutputStream (F2);
FileChannel Inc=in.getchannel ();
FileChannel Outc=out.getchannel ();
int i=0;
while (true) {
if (Inc.position () ==inc.size ()) {
Inc.close ();
Outc.close ();
return new Date (). GetTime ()-time;
}
if ((Inc.size ()-inc.position ()) <20971520)
length= (int) (Inc.size ()-inc.position ());
Else
length=20971520;
Inc.transferto (Inc.position (), LENGTH,OUTC);
Inc.position (Inc.position () +length);
i++;
}
}

3.

public static long Forimage (File f1,file F2) throws exception{
Long Time=new Date (). GetTime ();
int length=2097152;
FileInputStream in=new FileInputStream (F1);
Randomaccessfile out=new randomaccessfile (F2, "RW");
FileChannel Inc=in.getchannel ();
Mappedbytebuffer Outc=null;
Mappedbytebuffer Inbuffer=null;
Byte[] B=new byte[length];
while (true) {
if (Inc.position () ==inc.size ()) {
Inc.close ();
Outc.force ();
Out.close ();
return new Date (). GetTime ()-time;
}
if ((Inc.size ()-inc.position ()) <length) {
length= (int) (Inc.size ()-inc.position ());
}else{
length=20971520;
}
B=new Byte[length];
Inbuffer=inc.map (Mapmode.read_only,inc.position (), length);
Inbuffer.load ();
Inbuffer.get (b);
Outc=out.getchannel (). Map (Mapmode.read_write,inc.position (), length);
Inc.position (B.length+inc.position ());
Outc.put (b);
Outc.force ();
}
}

4.

public static long Forchannel (File f1,file F2) throws exception{
Long Time=new Date (). GetTime ();
int length=2097152;
FileInputStream in=new FileInputStream (F1);
FileOutputStream out=new FileOutputStream (F2);
FileChannel Inc=in.getchannel ();
FileChannel Outc=out.getchannel ();
Bytebuffer B=null;
while (true) {
if (Inc.position () ==inc.size ()) {
Inc.close ();
Outc.close ();
return new Date (). GetTime ()-time;
}
if ((Inc.size ()-inc.position ()) <length) {
length= (int) (Inc.size ()-inc.position ());
}else
length=2097152;
B=bytebuffer.allocatedirect (length);
Inc.read (b);
B.flip ();
Outc.write (b);
Outc.force (FALSE);
}
}

5.

Import Java.io.FileInputStream; Import Java.io.FileOutputStream; Import Java.nio.channels.FileChannel;

public class Testtransfer {

public static void Main (string[] args) throws Exception {

FileInputStream fis = new FileInputStream ("C:\\abc.txt");

FileOutputStream fos = new FileOutputStream ("C:\\123.txt");

FileChannel FC1 = Fis.getchannel ();

FileChannel FC2 = Fos.getchannel ();

Fc2.transferfrom (FC1, 0, Fc1.size ());

Fc1.transferto (0,fc1.size (), FC2);

Fc1.close ();

Fc2.close ();

Fis.close ();

Fos.close ();

}

}

Java File replication