Check if string exists in ArrayList

Question

I have an ArrayList with genres:

List<String> availableGenres = new ArrayList<>(Arrays.asList("Arcade", "Puzzle", "Racing", "Casual", 
      "Strategy", "Sport")
        );

I want to check if incoming string exists in this ArrayList. Okay, it's simple with contains, incoming "Sport":

if (availableGenres.contains(game.getGenre())){
    ...    
    this true   
}

But sometimes incoming String contains both of these values, like this: "Puzzle Arcade" and this method will return false, but it's actually true. How to deal with this case?

You have to split the incoming String, split and for each part check its presence in the list. — Nikolas
– Nikolas, Commented May 19, 2020 at 12:15

Jason · Accepted Answer · 2020-05-19 12:39:14Z

2

What you can do is split the input using whitespace and then check if any of the values in the ArrayList contain any of the input value(s).

String input = "Puzzle Arcade";

boolean contains = Stream.of(input.split(" "))
    .anyMatch(availableGenres::contains);

It is worth noting that you could also use a Set of String instead of a List if the values are unique (include case-sensitive).

edited May 19, 2020 at 12:39

answered May 19, 2020 at 12:20

Jason

5,2442 gold badges15 silver badges22 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

MC Emperor Over a year ago

Or anyMatch(availableGenres::contains).

Jason Over a year ago

Yeah, very well said, i'll change that.

Hashir · Accepted Answer · 2020-05-19 12:23:32Z

0

If you want to explicitly check which word matches in the user-given string

str = "Puzzle Arcade";
String[] tokens = str.split("\\s+");

for each(String word : tokens){
  if (availableGenres.contains(word)){
    //mark which word was present if you want to
    //TRUE;
    }
}

answered May 19, 2020 at 12:23

Hashir

4007 silver badges22 bronze badges

Collectives™ on Stack Overflow

Check if string exists in ArrayList

2 Answers 2

2 Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

2 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related