利用Calendar输出指定年份的全年日历

1. /**
2. *@authorbzwm
3. *
4. */
5. importjava.io.BufferedReader;
6. importjava.io.IOException;
7. importjava.io.InputStreamReader;
8. importjava.util.Calendar;
9. importjava.util.GregorianCalendar;
11. publicclassCalendarTest{
12. publicstaticvoidmain(String[]args)throwsIOException{
13. BufferedReaderin=newBufferedReader(newInputStreamReader(System.in));
14. System.out.print("请输入一个年份：");
15. Stringyears=in.readLine();
16. CalendarPrintercp=newCalendarPrinter(years);
17. cp.printCal();
18. }
19. }
21. classCalendarPrinter{
23. privateintyear;
25. privatestaticfinalintmonthCount=12;
27. publicCalendarPrinter(Stringyears){
28. if(!years.matches("//d{4}")){
29. System.out.println("yearthatinputtedisillagel.");
30. return;
31. }
32. year=Integer.parseInt(years);
33. }
35. publicvoidprintCal(){
36. //constructdascurrentdate
37. GregorianCalendargCal=newGregorianCalendar();
39. //setyear
40. gCal.set(Calendar.YEAR,year);
41. for(intmonth=0;month<monthCount;month++){
42. gCal.set(Calendar.MONTH,month);
43. printOut(gCal);
44. }
45. }
47. privatevoidprintOut(Calendarcal){
48. intmonth=cal.get(Calendar.MONTH);
50. //setcaltostartdateofthemonth
51. cal.set(Calendar.DAY_OF_MONTH,1);
53. intweekday=cal.get(Calendar.DAY_OF_WEEK);
55. //printheading
56. System.out.println("SunMonTueWedThuFriSat");
58. //indentfirstlineofcalendar
59. for(inti=Calendar.SUNDAY;i<weekday;i++)
60. System.out.print("");
62. do{
63. //printday
64. intday=cal.get(Calendar.DAY_OF_MONTH);
65. if(day>0)
66. System.out.print(""+day+"");
67. else
68. System.out.print(""+day+"");
70. //startanewlineaftereverySaturday
71. if(weekday==Calendar.SATURDAY)
72. System.out.println();
74. //advancedtothenextday
75. cal.add(Calendar.DAY_OF_MONTH,1);
76. weekday=cal.get(Calendar.DAY_OF_WEEK);
77. }while(cal.get(Calendar.MONTH)==month);
78. //theloopexitswhendisday1ofthenextmonth
80. //printfinalendoflineifnecessary
81. if(weekday!=Calendar.SUNDAY)
82. System.out.println();
83. }
84. }