Memory Mapped I/O Example: Old Way

import java.io.*;

public class FileCopier {

  public static void main(String[] args) {

    if (args.length != 2) {
      System.err.println("Usage: java FileCopier infile outfile");
			return;
    }
    try {
      copy(args[0], args[1]);
    }
    catch (IOException e) {
      System.err.println(e);
    }

  }

  public static void copy(String inFile, String outFile) 
   throws IOException {

    InputStream in = null;
    OutputStream out = null;
    
    try {
      in  = new FileInputStream(inFile);
      out = new FileOutputStream(outFile);
      for (int b = in.read(); b != -1; b = in.read()) {
         out.write(b);    
      }
    }
    finally {
      try {
        if (in != null) in.close();
      }
      catch (IOException e) {}
      try {
        if (out != null) out.close();
       }
      catch (IOException e) {}
    }

  }

}