20200724 千锤百炼软工人第十九天

今天完成了一个日期类的小程序

在此附上代码和截图

以下是Date类代码

package a20200724;
public class Date {
 String[] weekName= {"Sun","Mon","Tue","Wed","Thu","Fri","Sat"};
 String[] monthName={"Jan","Feb","Mar","Api","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"};
 private int year;
 private int month;
 private int day;
 public int  isLeapYear(){
         if ((this.year % 4 == 0 && this.year % 100 != 0) || this.year % 400 == 0)return 1;
         else return 0;
      }
 Date(int a,int b,int c){
  if(b>12) {
   this.month=12;
   if(c>31) {
    this.day=31;
   }
   else if(c<1) {
    this.day=1;
   }
   else {
    this.day=c;
   }
  }
  else if(b<1) {
   this.month=1;
   if(c>31) {
    this.day=31;
   }
   else if(c<1) {
    this.day=1;
   }
   else {
    this.day=c;
   }
  }
  else {
  if(b==2) {
   if(a%4!=0&&c>28) {
    this.day=28;
   }
   else if(a%4!=0&&c<1) {
    this.day=1;
   }
   else if(a%4==0&&c>29) {
    this.day=29;
   }
   else if(a%4==0&&c<1) {
    this.day=1;
   }else {
    this.year=a;
    this.month=2;
    this.day=c;
   }
  }
  else if(b==1||b==3||b==5||b==7||b==8||b==10||b==12) {
   if(c<1) {
    this.day=1;
    this.year=a;
    this.month=b;
   }
   else if(c>31) {
    this.day=31;
    this.year=a;
    this.month=b;
   }
   else {
    this.day=c;
    this.month=b;
    this.year=a;
   }
  }
  else {
   if(c<1) {
    this.day=1;
    this.year=a;
    this.month=b;
   }
   else if(c>30) {
    this.day=30;
    this.year=a;
    this.month=b;
   }
   else {
    this.day=c;
    this.month=b;
    this.year=a;
   }
  }
 }
  System.out.println("Constructor run ");
  }
 Date(){
  this.year=1;
  this.day=1;
  this.month=1;
  System.out.println("Constructor run ");
 }
 Date(Date a){
  this.year=a.year;
  this.month=a.month;
  this.day=a.day;
  System.out.print("CopyConstructor run ");;
 }
 public void finalize() {
  System.out.print("Destructor run ");
 }
 public void setYear(int a) {
  this.year=a;
 }
 public void setMonth(int a) {
  this.month=a;
  if(this.month>12)
        {
            this.month=12;
        }
        if(this.month<1)
        {
            this.month=1;
        }
 }
 public void setDay(int a) {
  this.day=a;
  if(this.day<1)
        {
   this.day=1;
        }
       if(this.day>31)
       {
        this.day=31;
       }
       if(this.month==2)
       {
           if(isLeapYear()==1)
           {
               if(this.day>30)
               {
                this.day=29;
               }
           }
           else{
                if(this.day>30)
                {
                 this.day=28;
                }
           }
       }
 }
 public int getYear() {
  return this.year;
 }
 public int getMonth() {
  return this.month;
 }
 public int getDay() {
  return this.day;
 }
 public void tomorrow() {
  if(this.day==31)
        {
            if(this.month==12){this.year++;this.month=1;this.day=1;}
            else{this.month++;this.day=1;}
        }
        else if(this.day==30&&(this.month==4||this.month==6||this.month==9||this.month==11||this.month==8))
        {
         this.day=1;
         this.month++;
        }
        else if(this.month==2)
        {
            if(isLeapYear()==1)
            {
                if(this.day==29)
                {this.day=1;
                this.month++;}
                else{this.day++;}
            }
            else{
                if(this.day==28)
                {
                 this.day=1;
                 this.month++;
                }
            }
            }
        else{this.day++;}
 }
 public void yesterday() {
  if(this.day==1){
            if(this.month==1){
             this.year--;
             this.month=1;
             this.day=31;
            }
            else if(this.month==2||this.month==4||this.month==6||this.month==9||this.month==11){
             this.month--;
             this.day=31;
            }
            else if(this.month==3)
            {
             this.month--;
                if(isLeapYear()==1){this.day=29;}
                else{this.day=28;}
            }
            else if(this.month==5||this.month==7||this.month==10||this.month==12){
             this.month--;
             this.day=30;
            }
         }
         else{
          this.day--;
        
 }
}
 public void chineseFormat() {
  System.out.print(this.year+"年"+this.month+"月"+this.day+"日 ");
 }
 public void americaformat() {
  System.out.print(monthName[this.month-1]+" "+this.day+","+this.year+" ");
 }
 public int nyear(int year) {
   if ((year % 4 == 0 && year % 100 != 0) || year % 400 == 0)
          return 366;
      else
          return 365;
 }
 public int nmonth(int y,int m) {
  if (m == 1 || m == 3 || m == 5 || m == 7 || m == 8 || m == 10 || m == 12)
         return 31;
     else if (nyear(y) == 366 && m == 2)
         return 29;
     else if (nyear(y) == 365 && m == 2)
         return 28;
     else
         return 30;
 }
 public int GetDays(int year,int month) {
   int i = 0;
      int sum = 0;
      if (year>1990)
      for (i = 1990; i < year; i++)
          sum += nyear(i);
      if (month>1)
      for (i = 1; i < month; i++)
      {
          sum += nmonth(year, i);
      }

      return sum;
 }
 public void printMonthCalendar() {
  int i, j, sum, daycount;
     while (this.year+this.month!=0)
     {
         sum = GetDays(this.year, this.month);
         day = (sum + 1) % 7;  //得出一个月第一行前要空几格
         daycount = nmonth(this.year, this.month);   //算出这一个月的天数
         System.out.print(weekName[0]+weekName[1]+weekName[2]+weekName[3]+weekName[4]+weekName[5]+weekName[6]+" ");
         for (i = 0; i < day; i++)
             {
        
         System.out.print("   ");
             }
         for (i = 1, j = day + i; i <= daycount; i++, j++)
         {
         System.out.printf("%3d",i);
             if (j % 7 == 0)
         System.out.print(" ");
         }
         System.out.print(" ");
         year=0;
         month=0;
     }
 }
 int  weekDay(){
 int a,b,c;
 a=GetDays(this.year,this.month);
 b=a+this.day-1;
 c=b%7;
 return c;
 }
}

以下是主函数代码

package a20200724;
import  java.util.Scanner;
public class main {
 public static void main(String[] arg) {
  int year,month,day;
     Date d1=new Date();
     Date d2=new Date(d1);
     Scanner y = new Scanner(System.in);
     Scanner m = new Scanner(System.in);
     Scanner d = new Scanner(System.in);
     year = y.nextInt();
     month = m.nextInt();
     day = d.nextInt();
     d1.setYear(year);
     d1.setMonth(month);
     d1.setDay(day);
     d1.yesterday();
     d1.chineseFormat();
     Scanner y1 = new Scanner(System.in);
     Scanner m1 = new Scanner(System.in);
     Scanner D1 = new Scanner(System.in);
     year = y1.nextInt();
     month = m1.nextInt();
     day = D1.nextInt();
     d2.setYear(year);
     d2.setMonth(month);
     d2.setDay(day);
     d2.tomorrow();
     d2.americaformat();
     d2.printMonthCalendar();
     d1=null;
     d2=null;
     System.gc();
}
}

 

以下是运行结果截图