run.java

判断闰年

import java.util.*;
class run
{  public static void main(String[] args) 
	{
		Calendar calendar=Calendar.getInstance();
        calendar.set(2006,1,1);
		int xingqi=calendar.get(Calendar.DAY_OF_WEEK)-1;
		int x,y;
		y=calendar.get(Calendar.YEAR);
		if(y%4==0&&y%100!=0 ||y%400==0)
		{x=29;}
	   else
		{x=28;}
		 String a[]=new String[xingqi+x];
		for(int i=0;i<xingqi;i++)
		{ a[i]="  ";}
		for(int i=xingqi,n=1;i<xingqi+x;i++)
		{ if(n<=9)
			a[i]=String.valueOf(n)+" ";
		  else
			a[i]=String.valueOf(n);
		    n++;
		}
		for(int i=0;i<a.length;i++)
		{if(i%7==0)
			{System.out.println("");}
		System.out.print("  "+a[i]);
		}
	}
}