Copying directory in java

see following example :


public void copyDirectory(File srcDir, File dstDir) throws IOException {
        if (srcDir.isDirectory()) {
            if (!dstDir.exists()) {
                dstDir.mkdir();
            }

            String[] children = srcDir.list();
            for (int i = 0; i < children.length; i++) {
                copyDirectory(new File(srcDir, children[i]),
                        new File(dstDir, children[i]));
            }
        } else {
            // This method is implemented in Copying a File
            copyFiles(srcDir, dstDir);
        }
    }



public static void copyFiles(File src, File dest) throws IOException {
    //Check to ensure that the source is valid...
    if (!src.exists()) {
        throw new IOException("copyFiles: Can not find source: " + src.getAbsolutePath()+".");
    } else if (!src.canRead()) { //check to ensure we have rights to the source...
        throw new IOException("copyFiles: No right to source: " + src.getAbsolutePath()+".");
    }
    //is this a directory copy?
    if (src.isDirectory())     {
        if (!dest.exists()) { //does the destination already exist?
            //if not we need to make it exist if possible (note this is mkdirs not mkdir)
            if (!dest.mkdirs()) {
                throw new IOException("copyFiles: Could not create direcotry: " + dest.getAbsolutePath() + ".");
            }
        }
        //get a listing of files...
        String list[] = src.list();
        //copy all the files in the list.
        for (int i = 0; i < list.length; i++)
        {
            File dest1 = new File(dest, list[i]);
            File src1 = new File(src, list[i]);
            copyFiles(src1 , dest1);
        }
    } else {
        //This was not a directory, so lets just copy the file
        FileInputStream fin = null;
        FileOutputStream fout = null;
        byte[] buffer = new byte[4096]; //Buffer 4K at a time (you can change this).
        int bytesRead;
        try {
            //open the files for input and output
            fin =  new FileInputStream(src);
            fout = new FileOutputStream (dest);
            //while bytesRead indicates a successful read, lets write...
            while ((bytesRead = fin.read(buffer)) >= 0) {
                fout.write(buffer,0,bytesRead);
            }
        } catch (IOException e) { //Error copying file...
            IOException wrapper = new IOException("copyFiles: Unable to copy file: " +
                        src.getAbsolutePath() + "to" + dest.getAbsolutePath()+".");
            wrapper.initCause(e);
            wrapper.setStackTrace(e.getStackTrace());
            throw wrapper;
        } finally { //Ensure that the files are closed (if they were open).
            if (fin != null) { fin.close(); }
            if (fout != null) { fout.close(); }
        }
    }
}