记事本的打开代码，看看又错误没if (e.getSource()==open){JFileChooser choose=new JFileChooser();choose.showOpenDialog(text);int returnvar=choose.showOpenDialog(text); if (returnvar==JFileChooser.APPROVE_OPTION) { setTitle(file.getName()+" - 记事本");try{File file=choose.getSelectedFile();FileReader fr=new FileReader(file); int len=(int)file.length(); char []buffer=new char[len]; fr.read(buffer,0,len); fr.close(); text.setText(new String(buffer));}catch(Exception f){f.printStackTrace();} }}