JAvaある月の具体的な日数(潤年不潤年を含む)を取得

		//  1
		String strDate = "2012-02"; 
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM"); 
		Calendar calendar = new GregorianCalendar(); 
		Date date1 = sdf.parse(strDate); 
		calendar.setTime(date1); //       
		System.out.println("   =" + calendar.getActualMaximum(Calendar.DAY_OF_MONTH)); 
		
		//  2
		System.out.println("   =" + new Date(2007,02,0).getDate());