Question

I need some help with regular expression.

I need to search for “Android 2.2.x” where x can be 1-9 in a string so I created this RegEx
Androind 2.2.\d{1} This works fine.

Now I want to find Android 2.2 in the in the string

If I search using Regex “Androind 2.2” it matches both “Android 2.2” and “Android 2.2.x” But I want regex to match only “Android 2.2”

Can anyone please help me with this.

Thanks,

Answer 1

Use negative lookahead. "Android 2.2(?!\.\d)" matches "Android 2.2" but not "Android 2.2.1", "Android 2.2.2", "Android 2.2.10", etc. It will also match "Android 2.2." if the next character is not a digit or the end of the string is reached.

See Grouping Constructs for more information.