Java™ Application Development on Linux - Dator

Appendix BA Java Swing GUI for BudgetPro533265 }266 }267 };268 creat.addActionListener(creatAction);269270 // function is to get selection from table and cd there271 view.addActionListener(cdAction);272 // but it starts off disabled, since there is no data yet273 view.setEnabled(false);274275 // ------------------------------------------------------------276 frame.getRootPane().setDefaultButton(creat);277 clos.grabFocus();278279 return retval;280281 } // createButtons282283 public static void284 main(String[] args)285 {286 BudgetPro app = null;287288 //Create the top-level container289 JFrame frame = new JFrame("BudgetPro");290291 // ----------- set up the account/app based on the command line args292 try {293 String username = System.getProperty("user.name", "default");294 if (args.length > 0) {295 app = new BudgetPro(frame, username, args[0]);296 } else {297 System.err.println("usage: BudgetPro dollar_amt");298 System.exit(1);299 }300 } catch (Exception e) {301 System.err.println("Error on startup.");302 e.printStackTrace();303 System.exit(2);304 }305306 // ----------- now set up the UI and get things going307 try {308 UIManager.setLookAndFeel(309 UIManager.getCrossPlatformLookAndFeelClassName());310 } catch (Exception e) {311 System.err.println("Can't set the desired look and feel.");312 e.printStackTrace();313 System.exit(3);