mport java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.nio.MappedByteBuffer;
import java.nio.channels.FileChannel;
public class MbbDemo {
public static void main(String []args)throws Exception
{
File file=new File("d://a.txt");
FileInputStream fis=new FileInputStream(file);
FileOutputStream fos=new FileOutputStream("d://acopy.txt");
FileChannel fChannel=fis.getChannel();
FileChannel out=fos.getChannel();
MappedByteBuffer mbb=fChannel.map(FileChannel.MapMode.READ_ONLY, 0,file.length());
out.write(mbb);
if(fis!=null)fis.close();
if(fos!=null)fos.close();
}
}