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Java Convert Hexadecimal number into Integer

Mohammed Abdul Ali
Greenhorn

Joined: Apr 24, 2010
Posts: 1
Hi,

I am new in Java programming. I am trying to convert hexadecimal number into integer and getting NumberFormatException error. The code sample is:

String str1 = "0XA800001D";

String str2 = str1.replaceFirst("0X", "");

int value_int = Integer.parseInt( str2.trim(), 16 );

Can anybody please help me!!!




Henry Wong
author
Sheriff

Joined: Sep 28, 2004
Posts: 18509
    
  40


Java integers are signed. And that hexidecimal number is too big to fit.

Henry


Books: Java Threads, 3rd Edition, Jini in a Nutshell, and Java Gems (contributor)
Rob Spoor
Sheriff

Joined: Oct 27, 2005
Posts: 19651
    
  18

Try using a long as intermediate result:
This code will first create a long with value 2818572317, then the cast to int will turn it into -1476394979.


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