一个手机日历程序的源代码,包括显示重要日期,节假日等

				//package calender;
				import java.util.*;
				public interface ImportDateFilter
				{
					public final static int NORMALDAY = 0;
					public final static int HOLIDAY = 1;
					public final static int IMPORTANTDAY = 2;
					public final static int BOTH = 3;
				    //判断日期类型
					abstract public int isImportantDate(Calender date);
				}