Is there any better and faster way to copy...

Question

can anyone teel me any better and faster way to copy...
InputStream in = null;
          OutputStream out = null;
          try {
               in = new FileInputStream(src);
               out = new FileOutputStream(dest);
               byte[] buf = new byte[1024];
               int len;
               while ((len = in.read(buf)) > 0) {
                    out.write(buf, 0, len);
          }catch(Exception e){
}

Answer 1

Here's a small program as a sample and for testing. Just ran a few tests with a file of 1.5 MB (buffered slightly faster) and a file of 45 MB (NIO much faster) ...
import java.io.*;
import java.nio.channels.*;
public class Copy {
     public static void main(String[] args) {
          if (args.length == 3) {
               File from = new File(args[1]);
               File to = new File(args[2]);
               if (from.exists()) {
                    long start = System.currentTimeMillis();
                    try {
                         if (args[0].equals("nio")) {
                              copyNIO(from,to);
                         else {
                              copyBuffered(from,to);
                    catch (Exception ex) {
                         ex.printStackTrace();
                    System.out.println("Time: " + (System.currentTimeMillis() - start) + " ms");
     private static void copyBuffered(File from,File to) throws IOException {
          FileInputStream fis = null;
          FileOutputStream fos = null;
          try {
               fis = new FileInputStream(from);
               fos = new FileOutputStream(to);
               BufferedInputStream in = new BufferedInputStream(fis);
               BufferedOutputStream out = new BufferedOutputStream(fos);
               byte[] buf = new byte[8192];
               int r = 0;
               while ((r = in.read(buf)) > 0) {
                    out.write(buf,0,r);
          finally {
               if (fis != null) {
                    try {
                         fis.close();
                    catch (Exception ex) {}
               if (fos != null) {
                    try {
                         fos.close();
                    catch (Exception ex) {}
     private static void copyNIO(File from,File to) throws IOException {
               FileInputStream fis = null;
               FileOutputStream fos = null;
               try {
                    fis = new FileInputStream(from);
                    fos = new FileOutputStream(to);
                    FileChannel chin = fis.getChannel();
                    FileChannel chout = fos.getChannel();
                    long size = from.length();
                    long total = 0;
                    while (total < size) {
                         total += chin.transferTo(0,size,chout);
               finally {
                    if (fis != null) {
                         try {
                              fis.close();
                         catch (Exception ex) {}
                    if (fos != null) {
                         try {
                              fos.close();
                         catch (Exception ex) {}
}