Regex Optimization for large lists

Question

I am comparing two lists of strings to find possible matches. Example:

public class Tester {

    public static void main(String[] args) {

        List

        

Answer 1

I think that you shouldn't use regex for that: I believe that looking into String#contains (here is a link to its javadoc entry) would give you better results, in terms of performance ;)

For example, your code could be:

for(final String s2: test2){
    for (final String s: test){
        if(s.contains(s2)) {
            System.out.println("Match");
        }
    }
}