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| class Solution {
private static final int[] DAYS_PER_MONTH = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
public int dayOfYear(String date) {
int year = Integer.parseInt(date.substring(0, 4));
int month = Integer.parseInt(date.substring(5, 7));
int day = Integer.parseInt(date.substring(8));
boolean isLeapYear = isLeapYear(year);
int result = 0;
for (int i = 1; i < month; i++) {
result += DAYS_PER_MONTH[i];
if (i == 2 && isLeapYear) {
result++;
}
}
result += day;
return result;
}
private boolean isLeapYear(int year) {
return (year % 4 == 0 && year % 100 != 0) || year % 400 == 0;
}
}
|