java-HJ73 计算日期到天数转换
import java.util.Calendar;
import java.util.HashMap;
import java.util.Scanner;
// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
while (in.hasNextInt()){
int year = in.nextInt();
int month = in.nextInt();
int day = in.nextInt();
Calendar calendar = Calendar.getInstance();
calendar.set(year, month-1, day);
System.out.println(calendar.get(Calendar.DAY_OF_YEAR));
}
}
// public static void main(String[] args) {
// Scanner in = new Scanner(System.in);
// int[] monthDays = new int[]{31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30};
// while (in.hasNextInt()){
// int year = in.nextInt();
// int month = in.nextInt();
// int day = in.nextInt();
// int days = day;
// for(int i=0; i<month-1; i++){
// days += monthDays[i];
// }
// if(month>2 && isLeapYear(year)){
// days++;
// }
// System.out.println(days);
// }
// }
// private static HashMap<Integer, Integer> monthDaysMap = new HashMap<Integer, Integer>();
// static {
// monthDaysMap.put(0, 0);
// monthDaysMap.put(1, 31);
// monthDaysMap.put(2, 31+28);
// monthDaysMap.put(3, 31+28+31);
// monthDaysMap.put(4, 31+28+31+30);
// monthDaysMap.put(5, 31+28+31+30+31);
// monthDaysMap.put(6, 31+28+31+30+31+30);
// monthDaysMap.put(7, 31+28+31+30+31+30+31);
// monthDaysMap.put(8, 31+28+31+30+31+30+31+31);
// monthDaysMap.put(9, 31+28+31+30+31+30+31+31+30);
// monthDaysMap.put(10, 31+28+31+30+31+30+31+31+30+31);
// monthDaysMap.put(11, 31+28+31+30+31+30+31+31+30+31+30);
// }
// public static void main(String[] args) {
// Scanner in = new Scanner(System.in);
// while (in.hasNextInt()){
// int year = in.nextInt();
// int month = in.nextInt();
// int day = in.nextInt();
// int days = monthDaysMap.get(month-1)+day;
// if(month>2 && isLeapYear(year)){
// days++;
// }
// System.out.println(days);
// }
// }
private static boolean isLeapYear(int year){
if(year%4==0 && year%100!=0){
return true;
}
if(year%400 == 0){
return true;
}
return false;
}
}