利用java编写万年历

  1 import java.util.Scanner;
  2 
  3 //D:\Program Files (x86)\eclipse\dropins
  4 
  5 public class PerpetualCalendar {
  6     
  7     static int year;        //年
  8     static int month;        //月
  9     
 10     static Scanner input = new Scanner(System.in);
 11     
 12     public static void main(String[] args){
 13         
 14         int space;
 15         
 16         InputYear();
 17         InputMonth();
 18         printTitle(year,month);
 19         space = Week() - 1;
 20         for(int i = 0; i < space; i++){
 21             
 22             System.out.print("\t");
 23         }
 24         for(int j = 1; j <= Day(month); j++){
 25             
 26             System.out.print(j + "\t");
 27             if((j + space) % 7 == 0){
 28                 
 29                 System.out.println();
 30             }
 31         }
 32         
 33         
 34     }
 35     //打印表头
 36     public static void printTitle(int year,int month){
 37         
 38         System.out.println(year + "年" + month + "月");
 39         System.out.println("-----------------------------------------------------");
 40         System.out.print("星期一\t星期二\t星期三\t星期四\t星期五\t星期六\t星期日\t");
 41         System.out.println();
 42     }
 43     //年份输入
 44     public static  void InputYear(){
 45         
 46         do{
 47             System.out.println("请输入年份：");
 48             year = input.nextInt();
 49             
 50             if(year < 1990){
 51                 
 52                 System.out.println("输入年份错误：");
 53             }
 54         }while(year < 1990);
 55     }
 56     //月份输入
 57     public static  void InputMonth(){
 58         
 59         do{
 60             System.out.println("请输入月份：");
 61             month = input.nextInt();
 62             
 63             if(month > 12 || month < 1){
 64                 
 65                 System.out.println("输入月份错误：");
 66             }
 67         }while(month > 12 || month < 1);
 68     }
 69     //计算天数
 70     public static int CountDays(int year,int month){
 71         
 72         int days = 0;        //日
 73         for(int i = 1990; i < year; i++){
 74             
 75             if(IsLeapyear(i)){
 76                 
 77                 days = days + 366;
 78             }else{
 79                 
 80                 days = days + 365;
 81             }
 82         }
 83         
 84         //days加1进入下一年的1月1日
 85         days++;
 86         
 87         for(int j = 0; j < month ; j++){
 88             
 89             switch(j){
 90             
 91                 case 1:
 92                 case 3:
 93                 case 5:
 94                 case 7:
 95                 case 8:
 96                 case 10:
 97                 case 12:
 98                     
 99                     days = days + 31;
100                     break;
101                 case 4:
102                 case 6:
103                 case 9:
104                 case 11:
105                     
106                     days = days + 30;
107                     break;
108                 default:
109                     if(IsLeapyear(year)){
110                         
111                         days = days + 29;
112                     }else{
113                         
114                         days = days + 28;
115                     }
116             }
117         }
118         return days;
119     }
120     //计算月初一号是星期几
121     public static int Week(){
122         
123         int week = CountDays(year,month) % 7;
124         
125         if(week == 0){
126             
127             week = 7;
128         }
129         
130         return week;
131     }
132     //判断本月是多少天
133     public static int Day(int month){
134         
135         int day;
136         switch(month){
137         
138             case 1:
139             case 3:
140             case 5:
141             case 7:
142             case 8:
143             case 10:
144             case 12:
145                 
146                 day = 31;
147                 break;
148             case 4:
149             case 6:
150             case 9:
151             case 11:
152                 
153                 day = 30;
154                 break;
155             default:
156                 if(IsLeapyear(year)){
157                     
158                     day = 29;
159                 }else{
160                     
161                     day = 28;
162                 }
163         }
164         return day;
165     }
166     //计算平年还是闰年   返回值为布尔类型
167     public static boolean IsLeapyear(int year){
168         
169         return ((year % 4 == 0 && year % 100 != 0)||(year % 400 == 0));
170     }
171 }

初学小白调的代码，可能有很多BUG希望大神不吝赐教！！非常感谢！！

初学小白，望大神不吝赐教！