import java.io.Reader;
import java.io.Writer;
import java.io.FileReader;
import java.io.FileWriter;

public class FileReaderWriterExample
{
   public static void main( String[] args ) {
      try {
         Reader r = new FileReader( "in.txt" );
         Writer w = new FileWriter( "out.txt" );
         int c;
         while( ( c = r.read() ) != -1 ) {
	    System.out.print( ( char )c );
	    w.write( c );
         }
         r.close();
         w.close();
      }
      catch( Exception e ) {
         e.printStackTrace();
      }
   }
}