计算指定年份里月份中的天数

代码：

 

public void setDate(int year, int month, int day) {

	/** 计算当前月份的总天数 */
	switch (month + 1) { // The month is counted from zero.
	case 1:
	case 3:
	case 5:
	case 7:
	case 8:
	case 10:
	case 12:
	    days = 31;
	    break;
	case 4:
	case 6:
	case 9:
	case 11:
	    days = 30;
	    break;
	default:
	    if (year % 4 != 0)
		days = 28;
	    else if (year % 100 != 0)
		days = 29;
	    else if (year % 400 != 0)
		days = 28;
	    else
		days = 29;
	}
    }