Copy file from a location to another

Question

I work on a Java process that must be optimized and I have some questions.
This process includes a part of copying a file from a location from another (to be more specific, all files that exist in a directory, to copy in another directory), wich technique is more efficient and quickly? To copy using FileInputStream/FileOutputStream in Java or using a java Runtime process that calls a copy command of the Operating System?

Answer 1

I work on a Java process that must be optimized and I
have some questions.
This process includes a part of copying a file from a
location from another (to be more specific, all files
that exist in a directory, to copy in another
directory), wich technique is more efficient and
quickly? To copy using
FileInputStream/FileOutputStream in Java or using a
java Runtime process that calls a copy command of the
Operating System?Neither. Use the FileChannels in the nio package if you can:
/* Note:  Proper resource closing and exception handling is not done here */
try {
        // Create channel on the source
        FileChannel srcChannel = new
        FileInputStream("srcFilename").getChannel();
        // Create channel on the destination
        FileChannel dstChannel = new
        FileOutputStream("dstFilename").getChannel();
        // Copy file contents from source to destination
        dstChannel.transferFrom(srcChannel, 0, srcChannel.size());
        // Close the channels
        srcChannel.close();
        dstChannel.close();
    } catch (IOException e) {
    }Spawning a Runtime process is probably the least efficient way to do it.
- N