Parsing a hex string into an integer?

Posted on 2011-03-20
Medium Priority
Last Modified: 2012-05-11

What's the correct way to parse a hex integer string?:

    String str = "0xFF222222";
    int val = Integer.parseInt(str, 16);

The above throws a number format exception.

Question by:DJ_AM_Juicebox
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LVL 47

Expert Comment

ID: 35177846
LVL 47

Expert Comment

ID: 35177864
You should remove 0x part
LVL 47

Expert Comment

ID: 35177866

            String hex = "FF22222";
                    long num = Long.parseLong(hex,16);
      System.out.println("num: " + num);

num: 267526690

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LVL 47

Accepted Solution

for_yan earned 2000 total points
ID: 35177872

That is exactly your number:

 String hex = "FF222222";
                    long num = Long.parseLong(hex,16);
      System.out.println("num: " + num);

num: 4280427042
LVL 92

Expert Comment

ID: 35178075
When parsing a hex string you need to remove the 0x from the string as for_yan has mentioned above.
The 0x is not part of the actual hex value you are parsing.

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