Is there a pattern for re-using a BufferedWriter?

I am reading XML files from a directory (containing thousands of files), processi开发者_如何转开发ng the content and writing one output file for each input file. Is there a way of 're-pointing' an existing BufferedWriter instead of creating a new instance for each file?

...
    Scanner scanner;
    BufferedWriter writer;
    File outfile;
    for (File f: directory.ListFiles[]){
      scanner = new Scanner(f);
      outfile = ...;
      // processing input
      writer = new BufferedWriter(new FileWriter(new File(outfile)));
      // write the content
      writer.flush();
      writer.close();
    }

...

It seems a waste to have to create thousands of iterations of the Scanner and BufferedWriter.

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To me this would sound like a premature optimization. JVM is one of the smartest pieces of the software on the planet and can detect if your objects are short-lived. It can (and will) also perform a boatload of optimizations. Most likely any micro-optimizations you attempt to make will only result in poor performance.

Key to performance optimization is to measure, not to reason.