The fastest way to copy java files!

Package a_a_a;
Import Java.io.BufferedInputStream;
Import Java.io.BufferedOutputStream;
Import Java.io.File;
Import Java.io.FileInputStream;
Import java.io.FileNotFoundException;
Import Java.io.FileOutputStream;
Import java.io.IOException;
Import Java.nio.ByteBuffer;

Import Java.nio.channels.FileChannel;
		public class FileCopy {public static void main (string[] args) {File Srcfile = new File ("g:/2144/bei.xlsx");
		File Destdir = new file ("g:/2144/bei/");
		String newfilename = "bei.xlsx";			
		
		
Filecopy.copyfile (Srcfile, Destdir, NewFileName);
Long T1 = System.currenttimemillis ();			
for (int i = 0; i < i++) {//Filecopytest.copyfile1 (Srcfile, Destdir, NewFileName);
		Long t2 = System.currenttimemillis ();			
		for (int i = 0; i < i++) {Filecopy.copyfile (Srcfile, Destdir, NewFileName);
long t3 = System.currenttimemillis ();
		System.out.println (T2-T1);
		System.out.println (T3-T2);
	SYSTEM.OUT.PRINTLN (250);
	 /** * Copy Files* * @param srcfile * source file * @param destdir * target directory file * @param newfilename * New filename * @return The actual number of bytes copied, if the file, directory does not exist, the file is null, or an IO exception occurs, return-1/public long copyFile1 (file srcfile, file Destdir, Stri
		Ng NewFileName) {long copysizes = 0;
			if (!srcfile.exists ()) {System.out.println ("source file does not exist");
		copysizes =-1;
			else if (!destdir.exists ()) {System.out.println ("Destination directory does not exist");
		copysizes =-1;
			else if (NewFileName = = null) {System.out.println ("file name is null");
		copysizes =-1;
				else {try {Bufferedinputstream bin = new Bufferedinputstream (new FileInputStream (srcfile));
				Bufferedoutputstream bout = new Bufferedoutputstream (new FileOutputStream (New File (Destdir, NewFileName));
				int b = 0, i = 0;
					while ((b = bin.read ())!=-1) {bout.write (b);
				i++;
				} bout.flush ();
				Bin.close ();
				Bout.close ();

			copysizes = i; The catch (FileNotFoundException e) {e.printstacktrace ();
			catch (IOException e) {e.printstacktrace ();
	} return copysizes;  /** * Copy files (copy files at very fast speed) * * @param srcfile * source file * @param destdir * Target directory file * @param newfilename * New file name * @return The actual number of bytes copied, if the file, directory does not exist, the file is null, or an IO exception occurs, return-1/public static long copy
		File (file srcfile, file Destdir, String newfilename) {long copysizes = 0;
			if (!srcfile.exists ()) {System.out.println ("source file does not exist");
		copysizes =-1;
			else if (!destdir.exists ()) {System.out.println ("Destination directory does not exist");
		copysizes =-1;
			else if (NewFileName = = null) {System.out.println ("file name is null");
		copysizes =-1;
				else {try {filechannel fcin = new FileInputStream (srcfile). Getchannel ();
				FileChannel fcout = new FileOutputStream (new File (Destdir, NewFileName)). Getchannel ();
				Long size = Fcin.size ();
				Fcin.transferto (0, Fcin.size (), fcout);
				Fcin.close ();
				Fcout.close ();
			copysizes = size; catch (FILENOTFOUndexception e) {e.printstacktrace ();
			catch (IOException e) {e.printstacktrace ();
	} return copysizes;
 }
}