int getDays(int year, int month){
int[] days = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
return (year % 4 == 0 && (year % 100 =! 0 || year % 400 == 0) && month == 2)
? days[month]+1 : days[month];
}
int[] days = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
return (year % 4 == 0 && (year % 100 =! 0 || year % 400 == 0) && month == 2)
? days[month]+1 : days[month];
}
return 返回的是个条件表达式,括号中的条件为真时返回后面分号前面的值,为假时返回后面的。
{
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.YEAR, year);
calendar.set(Calendar.MONTH, month - 1);
return calendar.getMaximum(Calendar.DAY_OF_MONTH);
}
year在几个世纪之前? 有这个必要吗?