string - How to operate java string to achieve such effect

Question

For example, there are some strings like this:
H3C18,
H301C108
How to separate it into
H3 and C18,
H301 and C108

Answer 1

Regular expressions seem to meet the needs

import java.util.LinkedList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Test {
    public static void main(String[] args) {
        System.out.println(tokens("H3C18"));
        System.out.println(tokens("H301C108"));
    }

    private static final Pattern PATTERN = Pattern.compile("[a-zA-Z]\d+");

    public static List<String> tokens(String text) {
        List<String> result = new LinkedList<>();
        Matcher matcher = PATTERN.matcher(text);

        while (matcher.find()) {
            result.add(matcher.group(0));
        }

        return result;
    }
}

Output

[H3, C18]
[H301, C108]

Answer 2

The rule is "C", just make a fuss about it, it's not difficult, just think about it

Answer 3

Please don’t be a douchebag. Such problems are all problems that can be solved by checking the API.
Think more and make more progress

The idea is to cut the string and find the index corresponding to the character.