341. */

342. public class KeyboardListener implements KeyListener{

343.

344. public void keyPressed(KeyEvent e) { 345. }

346.

347. public void keyReleased(KeyEvent e) { 348. }

349.

350. public void keyTyped(KeyEvent e) { 351. char ch = e.getKeyChar();

352. if(ch>='0'&&ch<='9'||ch=='/'){ 353. pressButton(String.valueOf(ch));

354. }

355. if(ch=='='){

356. pressEqualButton(); 357. }

358. if(ch=='+'||ch=='-'){

359. pressOPButton(String.valueOf(ch));

360. }

361. }

362.

363. }

364.

365.

366. /**

367. * 入口方法

368. * @param args

369. */

370. public static void main(String[] args) { 371. new DateCalculator();

372. }

373.

374. }

七、 调试与运行情况