You can rap your Writer with a BufferedWriter for better performance.
BufferedWriter has the following constructors:
public BufferedWriter (Writer writer)
public BufferedWriter (Writer writer, in bufferSize)
Wrap FileWriter in a BufferedWriter:
FileWriter fw = new FileWriter(aFile);
BufferedWriter bw = new BufferedWriter (fw);
Wrap the Writer to a PrintWriter.
FileWriter fw = new FileWriter (aFile);
PrintWriter pw = new PrintWriter (new BufferedWriter(fw));