import java.io.*;
import java.nio.*;
import java.nio.channels.*;
 
public class X2 {
 
  public static void main (String [] args) {
 
    try {
 
      long l = System.currentTimeMillis();
      FileInputStream input   = new FileInputStream(args[0]);
      FileOutputStream output = new FileOutputStream(args[1]);
 
      FileChannel inputChannel  = input.getChannel();
      FileChannel outputChannel = output.getChannel();
 
      int inputLength = (int) inputChannel.size();
      MappedByteBuffer buffer = inputChannel.map(FileChannel.MapMode.READ_ONLY, 0, inputLength);
      outputChannel.write(buffer);
      System.out.println("Time = "+ (System.currentTimeMillis()-l));
 
    }
   catch (Exception e) {
     e.printStackTrace();
   }
 
  }
 
}