Java Period 转换日期为 float

Question

我有生日和第二个 LocalDate.now()我使用 Periof 打印这个

            Period test = Period.between(dateofbirth,LocalDate.now());

但是如果我想打印这个错误“P5Y8M11D”

我该怎么做才能得到它-“你在世界上生活了 10,23 年”

Answer 1

Period#getYears

P5Y8M11D 是 Period#toString 的默认格式.您可以获得期间的组成部分，例如根据您的要求使用其相应的访问器方法从 Period 的对象获取年、月、日等。

演示:

import java.text.DecimalFormat;
import java.text.NumberFormat;
import java.time.LocalDate;
import java.time.Period;
import java.util.Locale;

public class Main {
    public static void main(String[] args) {
        LocalDate dateofbirth = LocalDate.of(1975, 7, 15);
        Period test = Period.between(dateofbirth, LocalDate.now());
        System.out.printf("You have lived in the world for %d years.%n", test.getYears());

        double years = test.getYears() + test.getMonths() / 12.0 + test.getDays() / 365.0;
        System.out.printf("You have lived in the world for %.2f years.%n", years);

        DecimalFormat format = (DecimalFormat) NumberFormat.getNumberInstance(Locale.GERMAN);
        format.applyPattern("#,##0.00");
        String formattedValue = format.format(years);
        System.out.printf("You have lived in the world for %s years.%n", formattedValue);
    }
}

输出:

You have lived in the world for 45 years.
You have lived in the world for 45.36 years.
You have lived in the world for 45,36 years.