Verhogen Verhogen - 3 months ago 18
Java Question

Extract Integer Part in String

What is the best way to extract the integer part of a string like

Hello123


How do you get the 123 part. You can sort of hack it using Java's Scanner, is there a better way?

Answer

Why don't you just use a Regular Expression to match the part of the string that you want?

[0-9]

That's all you need, plus whatever surrounding chars it requires.

Look at http://www.regular-expressions.info/tutorial.html to understand how Regular expressions work.

Edit: I'd like to say that Regex may be a little overboard for this example, if indeed the code that the other submitter posted works... but I'd still recommend learning Regex's in general, for they are very powerful, and will come in handy more than I'd like to admit (after waiting several years before giving them a shot).