Source Code : File Copy in Java with NIO

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File Copy in Java with NIO

    

package com.java2s.tools.dev;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.channels.FileChannel;

class NioBenchmark1 {
  static int size = 60; // MB
  static int tests = 5;

  interface Copier {
    public void copy(File s, File t) throws IOException;
  }

  static class NioCopier implements Copier {
    public void copy(File s, File t) throws IOException {
      FileChannel in = (new FileInputStream(s)).getChannel();
      FileChannel out = (new FileOutputStream(t)).getChannel();
      in.transferTo(0, s.length(), out);
      in.close();
      out.close();
    }
  }

  static class IoCopier implements Copier {
    final int BUFF_SIZE = 5 * 1024 * 1024; // 5MB
    final byte[] buffer = new byte[BUFF_SIZE];

    public void copy(File s, File t) throws IOException {
      InputStream in = new FileInputStream(s);
      FileOutputStream out = new FileOutputStream(t);

      while (true) {
        int count = in.read(buffer);
        if (count == -1)
          break;
        out.write(buffer, 0, count);
      }
      out.close();
      in.close();
    }
  }

  public static void main(String[] arg) throws IOException {
    Copier io = new IoCopier();
    Copier nio = new NioCopier();
    nio.copy(new File("s"), new File("t"));
    io.copy(new File("s"), new File("t"));
  }


}

           
         
    
    
    
  

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