将字符串解析为long，前导零 [英] Parse String to long with leading zero

问题描述

长话短说（Java）：

  String input =0888880747; 
 
 long convert = Long.parseLong（输入）; 
  

转换的价值现在是：888880747

如何将 String 解析为 long 但保留领先优势零？

解决方案

你不能因为long没有前导零。一个long应该存储 。

你确定你甚至想要一个长整数吗？你想用它做什么？

Long story short (in Java):

String input= "0888880747;

long convert = Long.parseLong(input);

The value of convert is now: 888880747

How can I parse the String to a long but retain the leading zero?

解决方案

You cannot because a long does not have a leading zero. A long is supposed to store integers (the mathematical concept, not int), i.e.

A string of characters like 05 is not an integer, 5 is. What you can do is format a long that holds 5 with a leading zero when you print it, see e.g. java.util.Formatter.

Are you sure you even want to have a long/an integer? What do you want to do with it?

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