import java.io.*;
       // save existing file   
       buffer.save(view,null,true);
       //... Create File objects.
        File outFile = new File("d:/data/marked.do");  // write into second file

       //... Enclose in try..catch because of possible io exceptions.
       try {
            //... Create reader and writer for text files.
          BufferedWriter writer = new BufferedWriter(new FileWriter(outFile));

          Selection[] selection = textArea.getSelection();
          if(selection == null)
              view.getToolkit().beep();
          else
          {
              for(i = 0; i < selection.length; i++)
                  writer.write(textArea.getSelectedText(selection[i]));
           
              writer.newLine();   // Write system dependent end of line.
            //... Close reader and writer.
          writer.close();  // Close to unlock and flush to disk.
          }
       } catch (IOException e) {
            System.err.println(e);
            System.exit(1);
       }
       // clear selection
       textArea.goToPrevLine(false);
       textArea.goToNextLine(false);