Java Regex Question

Question

In Java - I need to search / check the input string for a number or for a specific string. it must be one of them. For example, if I have these input lines:

cccccccc 123 vvvvvvvvv jhdakfksah
cccccccc ABC vvvvvvnhj  yroijpotpo
cccdcdcd 234 vcbvbvbvbv lkjd dfdggf
ccccbvff ABC jflkjlkjlj fgdgfg

I need to find 123, ABC, 234, ABC

to find the number that I could use regex: "\ d +", but look for any of them. How to combine them?

Answer 1

You can specify alternatives in the regular expression with the symbol |:

\d+|[ABC]+

, -, "" ( ), , . , , :

" (\d+|[ABC]+)"

( , ). lookbehind:

(?<= )(\d+|[ABC]+)

, .

Answer 2

, , , - , . String.indexOf :

String line = ...;
int start = line.indexOf(" ") + 1;
int end = line.indexOf(" ", end);
String word2 = line.substring(start, end);

, ,

String word2 = line.split(" ")[1];

Answer 3

- ...

^[^ ]* ([^ ]*) .*$

Answer 4

Something like this: [0-9] + | [a-zA-Z] + or possibly [0-9] + | (ABC) +; You don’t know what your rule for symbols is.

Answer 5

Try this regex:

"(\d+|ABC)"

Answer 6

Try this regex:

^\w+\W+(\w+)

And make your expression according to the beginning of line c ^.