Check for int value from a arrayList

Asked Feb 10 '20 at 12:21

Active Feb 10 '20 at 12:21

Viewed 63 times

I have the following function, where I have to check for a particular value and print some output. Since I have same operation for multiple int values , I tried using arrayList.

public static final List<Integer> randomNumbers = Collections.unmodifiableList(
        new ArrayList<Integer>() {{
            add(7);
            add(9);
            etc...
        }});


public void checkNumbers(int state) {
    //This is existing
    if (state == 7 || state == 9) {
        //do something
    }

    // I can use this
    if (state == randomNumbers.get(0) || state == randomNumbers.get(1)) {
        //do something
    }
}

Is there any other simpler way to compare the entire arraylist ?

asked Feb 10 '20 at 12:21

cantona_7

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swtich-case statement seems to be handy, if you cannot compute the values in any way – Lecagy Feb 10 '20 at 12:23
2

tried something like contains? – Stultuske Feb 10 '20 at 12:24
using `contains` results in boolean, right ? – cantona_7 Feb 10 '20 at 12:26
1

Indeed. would that suit your needs? If not indexOf() can also help – Stultuske Feb 10 '20 at 12:27
1

just remember it will give the index of the first occurrence of the value and will return -1 if it is not there in the list. – Silverfang Feb 10 '20 at 12:29
`contains` wont be of help here. I didnt use `indexOf` because it might return -1. – cantona_7 Feb 10 '20 at 12:31
I think, as of now I can live with `get(0) and get(1)` to check for two values – cantona_7 Feb 10 '20 at 12:31
2

Note that you shouldn't use [double brace initialization](https://stackoverflow.com/questions/1958636/what-is-double-brace-initialization-in-java). – MC Emperor Feb 10 '20 at 12:33
Thats a really good point. Thank you so much – cantona_7 Feb 10 '20 at 12:41
@cantona_7 what is it you're trying to do if contains or indexOf can't help? – Stultuske Feb 10 '20 at 12:47

Check for int value from a arrayList

0 Answers0