Source Code : Fast Copy File

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Fast Copy File

 
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;

public class Main {
  static public void main(String args[]) throws Exception {
    FileInputStream fin = new FileInputStream("infile.txt");
    FileOutputStream fout = new FileOutputStream("outfile.txt");

    FileChannel inc = fin.getChannel();
    FileChannel outc = fout.getChannel();

    ByteBuffer bb = ByteBuffer.allocateDirect(1024);

    while (true) {
      int ret = inc.read(bb);
      if (ret == -1)
        break;
      bb.flip();
      outc.write(bb);
      bb.clear();
    }
  }
}

   
  

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