date2.java

刘艺编著的java教程的课本习题加例题代码 很有用哦！

public class Date2
{int year,month,day;
 Date2(int y,int m,int d)
 {year=y;
  month=m;
  day=d;}
 Date2()
 {}
 //finalize method
// public void finalize()
// {System.out.println("The object is deconstructed");}
 public void setdate(int y,int m,int d)
 {year=y;
  month=m;
  day=d;}
 void today()
 { System.out.println("The date of today is "+year+"/"+month+"/"+day);}
 boolean isleap(int y)
 { return (y%4==0&y%100!=0)|y%400==0 ;}
 void tomorrow()
 { int d,m,y;
   d=day+1;m=month;y=year;
   if((d>28)&month==2)
     {if(!isleap(year)|d>29)
      {d=1;m=m+1;}}
   else if(d>30&(month<7&month%2==0|month>7&month%2==1))
          {d=1;m=m+1;}
        else if(d>31)
             {d=1;m=m+1;
              if(m==13){y=y+1;m=1;}}
 System.out.println("The date of tomorrow is "+y+"/"+m+"/"+d);}
 public static void main(String args[])
 {Date2 de1,de2;
  de1=new Date2(1999,3,31);
  de2=new Date2();
  System.out.println("The first object:");
  if(de1.isleap(de1.year))System.out.println(de1.year+" is a leap year");
  de1.today();
  de1.tomorrow();
  System.out.println("The second object:");
  de2.setdate(2000,2,29);
  if(de2.isleap(de2.year))System.out.println(de2.year+" is a leap year");
  //de1.finalize();
  de2.today();
  de2.tomorrow();
  }
   }