JAVA学习日报 7.15

来，咱们今天继续研究上学期作业。

这个作业3其实有点惊到我了，当时我感觉也没太认真就做完了，回头一看发现……好长！而且要求好多！

其实就是一个写日历的简单程序，但说实话人类的公历纪年法奇怪的要求确实有点多，不过还是做完了。

代码如下：

package natusyasumi;
import java.util.Scanner;
class Date
{
    private int year=1,month=1,day=1;
    public Date(int a,int b,int c)
           {
               year=a;
               month=b;
               day=c;
           };
     public Date(){}
     public void  setYear(int a) {
         year=a;
           }
     public void  setMonth(int b) {
        month=b;
           }
     public void  setDay(int c) {
        day=c;
           }
     public int  getYear() {
         return year;
           }
     public int  getMonth() {
        return month;   
           }
     public int  getDay() {
        return day;
           }
     public void  yesterday( ) {
         int s=99;
            day--;
            s=isLeapYear( );
            if(month==1||month==4||month==6||month==8||month==9||month==11)
                {
                    if(day<1)
                    {
                        month--;
                        if (month<1)
                        {
                            month=12+month;
                            year--;
                        }
                        day=31+day;
                    }
                }
                else if(month==3)
                {
                if(s==1)
                {
                    if(day<1)
                    {
                        month--;
                        day=29+day;
                    }
                }
                else
                {
                    if (day<1)
                    {
                        month--;
                        day=28-day;
                    }
                }
                }
                else
                {
                   if(day<1)
                    {
                        month--;
                        day=30+day;
                    }
                }
           }
     public void  tomorrow( ) {
         int s;
            day++;
            s=isLeapYear( );

                if(month==1||month==3||month==5||month==7||month==8||month==10||month==12)
                {
                    if(day>31)
                    {
                        month++;
                        if (month>12)
                        {
                            month=month-12;
                            year++;
                        }
                        day=day-31;
                    }
                }
                else if(month==2)
                {
                if(s==1)
                {
                    if(day>29)
                    {
                        month++;
                        day=day-29;
                    }
                }
                else
                {
                    if (day>28)
                    {
                        month++;
                        day=day-28;
                    }
                }
                }
                else
                {
                   if(day>30)
                    {
                        month++;
                        day=day-30;
                    }
                }
           }
     public int  isLeapYear( ) {
            int x=99;
            if(year%400==0)
            {
                x=1;
            }
            else if(year%100==0)
            {
                x=0;
            }
            else if(year%4==0)
            {
                x=1;
            }
            return x;
           }
     public void  chineseFormat( ) {
         System.out.print(year+"年"+month+"月"+day+"日");
           }
     public void  americaformat( ) {
         switch(month)
            {
                case 1:System.out.print("Jan");break;
                case 2:System.out.print("Fed");break;
                case 3:System.out.print("Mar");break;
                case 4:System.out.print("Apr");break;
                case 5:System.out.print("May");break;
                case 6:System.out.print("Jun");break;
                case 7:System.out.print("Jul");break;
                case 8:System.out.print("Aug");break;
                case 9:System.out.print("sep");break;
                case 10:System.out.print("Oct");break;
                case 11:System.out.print("Nov");break;
                case 12:System.out.print("Dec");break;
            }
         System.out.print(" "+day+","+year+"\n");
           }
     public void  printMonthCalendar( ) {
         int w=getdate();
         int[] monthed={31,28,31,30,31,30,31,31,30,31,30,31};
         if(isLeapYear( )==1) monthed[1]=29;
         System.out.print("SunMonTueWedThuFriSat\n");
         int i,j;
         for(i=0;i<w;i++)
             System.out.print("   ");
         for(i=w,j=1;j<=monthed[month-1];i++,j++)
         {
         if(i%7==0) System.out.print("\n");
         if(j<10)
         System.out.print(" "+j+" ");
         else
         System.out.print(" "+j);
         }
         System.out.print("\n");
           }
     public int  getdate() {
         int w=0;
        w=(year+(year-1)/4-(year-1)/100+(year-1)/400)%7;
         int days=0;
         switch(month)
         {
         case 12: days+=30;
         case 11: days+=31;
         case 10: days+=30;
         case 9: days+=31;
         case 8: days+=31;
         case 7: days+=30;
         case 6: days+=31;
         case 5: days+=30;
         case 4: days+=31;
         case 3: if(isLeapYear( )==1) days+=29;
         else days+=28;
         case 2: days+=31;
         case 1: days+=0;
         }
         w=(w+days)%7;
         return w;
           }
}
final class Class3 {

    public static void main(String[] args) {
        int year,month,day;
        Date d1=new Date();
        Date d2=new Date();
        Scanner input=new Scanner(System.in);
        year=input.nextInt();
        month=input.nextInt();
        day=input.nextInt();
        d1.setYear(year);
        d1.setMonth(month);
        d1.setDay(day);
        d1.yesterday();
        d1.chineseFormat();
        year=input.nextInt();
        month=input.nextInt();
        day=input.nextInt();
        input.close();
        d2.setYear(year);
        d2.setMonth(month);
        d2.setDay(day);
        d2.tomorrow();
        d2.americaformat();
        d2.printMonthCalendar();
    }
}

运行结果如下：