date2.java.bak

来自「这是java实例的书上例题」· BAK 代码 · 共 27 行

public class Date2 
{ 
    int year,month,day;
    Date2(int y,int m,int d)            //类的构造方法,初始化成员变量
    {
        year = y;
        month = m;
        day = d;
    }  
    boolean isleapyear()
    {
        return (year%400==0)| (year%100!=0) & (year%4==0);
    }
    void print() 
    {
        System.out.println("date is "+year+'-'+month+'-'+day);
    }
}
class Date2_ex                             //其他类
{
    public static void main(String args[]) 
    {
        Date2 a = new Date2(2002,6,30) ;
        a.print();
        System.out.println(a.year+" is a leap year,"+a.isleapyear());
    }
}