package  Mypackage;
import java.util.*;                        //引用java.util包
public class NewDate 
{
    private int year,month,day;
    public NewDate(int y,int m,int d)
    {
        year = y;
        month = (((m>=1) & (m<=12)) ? m : 1);
        day = (((d>=1) & (d<=31)) ? d : 1);
    }  
    public NewDate()
    {                              
        this(0,0,0);
    }  
    public static int thisyear()           //獲得當年的年份
    { 
        return Calendar.getInstance().get(Calendar.YEAR);
    }
    public int year()                      //獲得年份
    { 
        return year;
    }
    public String toString()               //轉化為字符串
    {
        return year+"-"+month+"-"+day;
    }
}