Java 中计算一年中剩余的天数
若要获得今年剩余的天数，请找出当前年份总天数与已过去天数的差值。
首先，计算今年的天数。
Calendar calOne = Calendar.getInstance(); int dayOfYear = calOne.get(Calendar.DAY_OF_YEAR);
现在，计算 2018 年当前年份的总天数。
int year = calOne.get(Calendar.YEAR);
Calendar calTwo = new GregorianCalendar(year, 11, 31);
int day = calTwo.get(Calendar.DAY_OF_YEAR);
System.out.println("Days in current year: "+day);找出天数差，即可获得今年剩余的天数。
以下是完整示例。
示例
import java.util.Calendar;
import java.util.GregorianCalendar;
public class Demo {
public static void main(String args[]) {
Calendar calOne = Calendar.getInstance();
int dayOfYear = calOne.get(Calendar.DAY_OF_YEAR);
int year = calOne.get(Calendar.YEAR);
System.out.println("Current Year: "+year);
Calendar calTwo = new GregorianCalendar(year, 11, 31);
int day = calTwo.get(Calendar.DAY_OF_YEAR);
System.out.println("Days in current year: "+day);
int total_days = day - dayOfYear;
System.out.println("Total " + total_days + " days remaining in "+year);
}
}输出
Current Year: 2018 Days in current year: 365 Total 38 days remaining in 2018
更新于: 2020 年 6 月 29 日
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