将日期解析为长整数时，数字格式异常 [英] Number format exception while parsing the date to long

问题描述

在执行以下语句时，我遇到了NumberFormatException.

I'm getting a NumberFormatException while executing the below statements.

Calendar cal = Calendar.getInstance();

int year = cal.get(Calendar.YEAR);
int month = cal.get(Calendar.MONTH);
int day_of_month = 15;

long m_time = Long.parseLong((month + 1) + "/" + day_of_month + "/" + year);

和

long m_time = Long.parseLong(String.valueOf((month + 1) + "/" + day_of_month + "/" + year));

推荐答案

NumberFormatException的原因是，您试图解析不是有效的长表示形式的字符串:"2/15/2015"

The reason for the NumberFormatException is cause you are trying to parseLong a String that is not a valid long representation: "2/15/2015"

要正确解析您提出的日期字符串，请使用以下代码:

To parse the date string you've come up with correctly use this code:

SimpleDateFormat format = new SimpleDateFormat("M/dd/yyyy");
Date date = format.parse(month + 1 + "/" + day_of_month + "/" + year);

这篇关于将日期解析为长整数时，数字格式异常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！