java之MyData类

最新推荐文章于 2022-09-26 10:53:42 发布

hedafighter2011

最新推荐文章于 2022-09-26 10:53:42 发布

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public class MyData {
	private int year, month,day;
	private static int thisYear;
//////////////////////////////////////
	static
	{
		thisYear=2009;
	}
//////////////////////////////////////
	public MyData(int year,int month,int day)
	{
		this.set(year,month,day);		
	}
	public MyData()
	{
		this(1980,1,1);
	}
	public MyData(MyData d)
	{
		this.set(d);
		
	}
//////////////////////////////////////
	public void set(int y,int m,int d)
	{
		this.year=y;
		this.month=((m>=1)&(m<=12))?m:1;
		this.day=((d>=1)&(d<=31))?d:1;
		
	}
	public void set(MyData d)
	{
		set(d.year,d.month,d.day);
	}
//////////////////////////////////////
	public int getYear()
	{
		return this.year;
	}
	public int getMonth()
	{
		return this.month;
	}
	public int getDay()
	{
		return this.day;
	}
	
//////////////////////////////////////
	public String toString()
	{
		return this.year+"年"+this.month+"月"+this.day+"日";
	}
//////////////////////////////////////
	public static int getThisYear()
	{
	return thisYear;
	}
	//////////////////////////////////
	public static boolean isLeapYear(int year)
	{
		return year%400==0||year%100!=0&&year%4==0;
		
	}
	public boolean isLeapYear()
	{
		return isLeapYear(this.year);
	}
//////////////////////////////////////
	public boolean equals(MyData d)
	{
		return this==d||d!=null&&this.year==d.year&&this.month==d.month&&this.day==d.day;
	}
	public static int daysOfMonth(int year,int month)
	{
		switch(month)
		{
		case 1:case 3: case 5: case 7:case 8: case 10:case 12:return 31;
		case 4:case 6: case 9:case 11:return 30;
		case 2:return isLeapYear(year)?29:28;
		default :return 0;
		
		}
	
	}
	
	public int daysOfMonth()
	{
		return daysOfMonth(this.year,this.month);
		
	}
//////////////////////////////////////
	public void tomorrow()
	{
		this.day++;
		if(day>this.daysOfMonth())//天数溢出，月数加一
		{
			day=1;
			month++;
			if(month>12)
			{
				month=1;
				year++;
			}
		}
	}
	
//////////////////////////////////////
	public MyData yestoday()
	{
		MyData yes=new MyData(this);
		yes.day--;
		if(yes.day==0)
		{
			yes.month--;
			if(yes.month==0)//特悲催赶上1月1号，返回到上年的12月
			{
				yes.month=12;
				yes.year--;
				
			}
			yes.day=daysOfMonth(yes.year,yes.month);
			
		}
		return yes;
	}
}


	class MyData_ex
	{
		public static void main(String args[])
		{
			System.out.println("今年是"+MyData.getThisYear()+
					            ", 闰年?"+MyData.isLeapYear(MyData.getThisYear()));
			
			MyData d1=new MyData(2008,8,8);
			MyData d2=new MyData(d1);
			System.out.println(d2+"，闰年？"+d2.isLeapYear());
			System.out.println(d2+"，的昨天是 "+d2.yestoday()+"\n"+"的明天是 ");
			d2.tomorrow();
			System.out.println(d2);
		}
		
	}