47 lines
2.1 KiB
Java
47 lines
2.1 KiB
Java
package com.inmind.jdk8_date05;
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import java.time.LocalDate;
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public class LocalDateDemo09 {
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public static void main(String[] args) {
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//获取当前日期对象
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LocalDate localDate = LocalDate.now();
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System.out.println(localDate);//保存的是地址，但是重写了toString方法，展示了日期的内容
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//1、获取当前日期对象对应的信息
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showTime(localDate);
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//2、直接修改某个信息: withYear、withMonth、withDayOfMonth、withDayOfYear
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LocalDate localDate1 = localDate.withYear(2099);
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showTime(localDate1);
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LocalDate localDate2 = localDate.withMonth(10);
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showTime(localDate2);
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// 3、把某个信息加多少: plusYears、plusMonths、plusDays、plusWeeks
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LocalDate localDate3 = localDate.plusYears(10);
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LocalDate localDate4 = localDate.plusMonths(10);
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showTime(localDate3);
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showTime(localDate4);
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//4.把某个信息减多少：minusYears、minusMonths、minusDays、minusWeeks
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LocalDate localDate5 = localDate.minusYears(10);
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LocalDate localDate6 = localDate.minusMonths(10);
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showTime(localDate5);
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showTime(localDate6);
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//5、获取指定日期的LocalDate对象： public static LocalDate of(int year, int month, int dayOfMonth)
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LocalDate localDate7 = LocalDate.of(2029, 12, 12);
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LocalDate localDate8 = LocalDate.of(2019, 12, 12);
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showTime(localDate7);
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// 6、判断2个日期对象，是否相等，在前还是在后： equals isBefore isAfter
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System.out.println(localDate7.equals(localDate8));
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System.out.println(localDate7.isBefore(localDate8));
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System.out.println(localDate7.isAfter(localDate8));
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}
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private static void showTime(LocalDate localDate) {
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int year = localDate.getYear();
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int monthValue = localDate.getMonthValue();
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int day = localDate.getDayOfMonth();
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int dayOfYear = localDate.getDayOfYear();
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int value = localDate.getDayOfWeek().getValue();
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System.out.println(year+"-"+monthValue+"-"+day+"-"+dayOfYear+"-"+value);
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}
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}
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