SWT读写文件，生成新文件

通过FileDialog读写文件

FileDialog fd = new FileDialog(Display.getDefault().getActiveShell(),
    SWT.OPEN);
  fd.setFilterExtensions(new String[] { "*.java" });
  String result = fd.open();
  if (result != null && !"".equals(result)) {
   File file = new File(result);
   try {
    BufferedReader br = new BufferedReader(new FileReader(file));
    StringBuffer sb = new StringBuffer(1024);
    String line = br.readLine();
    while (line != null){
     sb.append(line);
     line = br.readLine();   
    }
    sb.append("");
    textArea.setText(sb.toString());
    br.close();
   } catch (FileNotFoundException e) {
    e.printStackTrace();
   } catch (IOException e) {
    e.printStackTrace();
   }
  }

写文件:

FileDialog fd = new FileDialog(Display.getCurrent().getActiveShell(),
    SWT.SAVE);
  fd.setFilterExtensions(new String[] { "*.java" });
  String result = fd.open();
  if (result != null && !"".equals(result)) {
   try {
    BufferedWriter bw = new BufferedWriter(new FileWriter(result));
    bw.write(textArea.getText());
    bw.flush();
    bw.close();
   } catch (FileNotFoundException e) {
    e.printStackTrace();
   } catch (IOException e) {
    e.printStackTrace();
   }
  }