Java Integer.parseInt（）不适用于大数字 [英] Java Integer.parseInt() Not Working for Large Numbers

问题描述

我有以下简单的代码，用于检测给定的IPv4地址确实只有数值（即在剥离点后）：

I have the following simple piece of code which is intended to detect that a given IPv4 address indeed only has numeric values (that is after the dots have been stripped):

import edu.gcc.processing.exceptions.net.IPAddressNumericException;

//Get the IP address
  String address = "239.255.255.255";

//Check to see if this is a number      
  try {
    String IPNumbers = address.replace(".", "");
    Integer.parseInt(IPNumbers);            
  } catch (NumberFormatException e) {
    System.out.print(e.getMessage());
  }

出于某种原因， NumberFormatException 被解雇，我收到此错误：

For some reason, the NumberFormatException is fired, and I get this error:

For input string: "239255255255"

有人可以帮我理解这个吗？ parseInt（）方法适用于较小的数字，例如 127001 。

Could someone please help me understand this? The parseInt() method works on smaller numbers, such as 127001.

感谢您的时间。

推荐答案

尝试使用 Long.parseLong（IPNumbers）

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