月份未从日期打印 - Java DateFormat [英] Month in not printed from a date - Java DateFormat

问题描述

如何从java的日期获取月份：

How to get month from a date in java :

        DateFormat inputDF  = new SimpleDateFormat("mm/dd/yy");
        Date date1 = inputDF.parse("9/30/11");

        Calendar cal = Calendar.getInstance();
        cal.setTime(date1);

        int month = cal.get(Calendar.MONTH);
        int day = cal.get(Calendar.DAY_OF_MONTH);
        int year = cal.get(Calendar.YEAR);

        System.out.println(month+" - "+day+" - "+year);

此代码返回日期和年份而不是月份。

This code return day and year but not month.

输出：

0 - 30 - 2011

推荐答案

这是因为您的格式不正确：您需要MM / dd / yy，因为mm是分钟：

This is because your format is incorrect: you need "MM/dd/yy" for the month, because "mm" is for minutes:

DateFormat inputDF  = new SimpleDateFormat("MM/dd/yy");
Date date1 = inputDF.parse("9/30/11");

Calendar cal = Calendar.getInstance();
cal.setTime(date1);

int month = cal.get(Calendar.MONTH);
int day = cal.get(Calendar.DAY_OF_MONTH);
int year = cal.get(Calendar.YEAR);

System.out.println(month+" - "+day+" - "+year);

打印 8 - 30 - 2011 （因为月份为零; 演示）

Prints 8 - 30 - 2011 (because months are zero-based; demo)

这篇关于月份未从日期打印 - Java DateFormat的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！