Hello all, I was wondering on how I would extract a number out of a String after a specified character. For example, if String s = "22+5+35" , how can I extract and store the numbers 22,5, and 35 in a ArrayList?
godzab 0 Junior Poster in Training
cgeier 187 Junior Poster
Convert string to char array, then check each character to see if it is a digit using Character.isDigit(char c)
OR
Use regex, with the split function.
See an Example Here
stultuske 1,116 Posting Maven Featured Poster
if you have to take into account other actions (+, -, :? *) and or brackets, split might not be the easiest way to go.
Taywin 312 Posting Virtuoso
If you want to do a split (and the purpose is to obtain only digit characters), use regular expression that splits at any non-digit character (i.e. "[^\d]+"). Then you would get an array containing only digit characters.
If you are dealing with mathematic expressions, spliting a string into a char array would be OK because you will need to deal with the whole string (numbers & operands).
Be a part of the DaniWeb community
We're a friendly, industry-focused community of developers, IT pros, digital marketers, and technology enthusiasts meeting, networking, learning, and sharing knowledge.