javaci.net

JFileChooser chooser = new JFileChooser("C:");
 if(chooser.showOpenDialog(this)==JFileChooser.APPROVE_OPTION) {
  File file = chooser.getSelectedFile();
  if(file.isFile()) {
   try {
    FileReader reader = new FileReader(file);
    BufferedReader breader = new BufferedReader(reader);
    String line = "";
    while((line=breader.readLine())!=null) {
     area.append(line+"\n");
    }
   } catch(IOException exc) {
    exc.printStackTrace();
   }
  }
 }