日期计算器java

1.import java.awt.*;

2.import java.awt.event.*;

3.import java.text.SimpleDateFormat;

4.import java.util.Calendar;

5.import java.util.Date;

6.import javax.swing.*;

7.

8./**

9.* 日期计算器

10. *

11. * @author Cyin

12. * @author Lee

13. * @author YOYO

14. * @author Skittles

15. *

16. * @since 2008-11-24

17. * @version 0.1

18. *

19. */

20. public class DateCalculator extends JFrame {

21.

22. /**

23. * 主面板

24. */

25. JPanel context = new JPanel();

26.

27. /**

28. * 三个子面板

29. */

30. JPanel displayPanel = new JPanel();

31. JPanel numPanel = new JPanel();

32. JPanel opPanel = new JPanel();

33.

34. /**

35. * 结果文本框

36. */

37. JTextField result = new JTextField("0",20); 38.

39. /**

40. * 主要按钮

41. */

42. JButton btnCE = new JButton("CE");

43. JButton btnPlus = new JButton("+");

44. JButton btnMinus = new JButton("-");