Java Calendar使用概要

	        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss:SSS");
		/*   */
		Calendar cal = Calendar.getInstance();
		
		int year = cal.get(Calendar.YEAR);//   
		int month = cal.get(Calendar.MONTH)+1;// 
		int day = cal.get(Calendar.DATE);//   
		int hour = cal.get(Calendar.HOUR_OF_DAY);//   
		int minute = cal.get(Calendar.MINUTE);// 
		int second = cal.get(Calendar.SECOND);//   
		int weekday = cal.get(Calendar.DAY_OF_WEEK);//       -    1-7
		int last = cal.getActualMaximum(cal.DAY_OF_MONTH); //         
		int DAY_OF_YEAR = cal.get(Calendar.DAY_OF_YEAR);//      
		int DAY_OF_MONTH = cal.get(Calendar.DAY_OF_MONTH);//      
		System.out.println("   : "+year+"   "+month+"   "+day+
				"   "+hour+"   "+minute+"   "+second+"   "+"
weekday: "+weekday
				+"      :"+last+"       :"+DAY_OF_YEAR+"      :"+DAY_OF_MONTH);
		
		cal.set(2013, 5, 4, 13, 44, 51);//      （  0  1 ）  ，        
		System.out.println(sdf.format(cal.getTime()));
		cal.set(Calendar.MILLISECOND, 0);//    
		System.out.println(sdf.format(cal.getTime()));
		cal.set(Calendar.YEAR, 2014);//   
		cal.set(Calendar.MONTH, 7);// （  0  1 ）  
		cal.set(Calendar.DATE, 11);//   
		cal.set(Calendar.HOUR_OF_DAY, 15);//   
		cal.set(Calendar.MINUTE, 33);//   
		cal.set(Calendar.SECOND, 32);//   
		System.out.println(sdf.format(cal.getTime()));
		
		cal.setTime(new Date());
		System.out.println(sdf.format(cal.getTime()));
		
		cal.add(Calendar.YEAR, 1);//   
		cal.add(Calendar.MONTH, 1);//   
		cal.add(Calendar.DATE, 1);//   
		cal.add(Calendar.HOUR_OF_DAY, -1);//   
		cal.add(Calendar.MINUTE, 1);//   
		cal.add(Calendar.SECOND, 1);//   
		System.out.println(sdf.format(cal.getTime()));
		
		Calendar calendarNew = Calendar.getInstance();
		calendarNew.add(Calendar.HOUR, -2);  
	    System.out.println("    ：" + calendarNew.compareTo(cal));