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I am trying to insert String values (using a Scanner) into an ArrayList.

I am getting the error:

non-static method add(E) cannot be referenced from a static context.

I assume the add() method is the problem - what other methods can I use to insert into an ArrayList that is static?

import java.util.*;

public class Solution {

    private static List<String> strings;

    public static void main(String[] args) throws Exception {
        Scanner scanner = new Scanner(System.in);

        for(int i = 0; i < 5; i++){
            String s = scanner.nextLine();
            List.add(s);
        }
    }
}
Ihor Patsian
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Kirsten de Wit
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1 Answers1

1

You try to add a string to List interface (add() method is not static) but should add it to your instance List<String> strings:

strings.add(s);

Also, you should initialize strings

private static List<String> strings = new ArrayList<>();

otherwise, you will get NullPointerException.

Ihor Patsian
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