Why is java 8 unable to identify the integer array (y) passed to this method?

Question

public class Solution {
    public static int solution(int[] x, int[] y) {

        // for every value in x
        for (int v : x){
            // check if value exists in y
            boolean i = y.contains(v);
            // if indicator returns false the value is returned
            if (i == false){
                int r = v;
            }

        }

Solution.java:8: error: cannot find symbol boolean i = y.contains(v); ^ symbol: method contains(int) location: variable y of type int[]

Arrays don't have a contains method. – Eran Jun 17 '20 at 06:56 — Eran, Jun 17 '20 at 06:56

Kavitha Karunakaran · Answer 1 · 2020-06-17T08:06:34.967

1

As pointed out in the comment, arrays in java don't have contains() method. But if the arrays x and y are already sorted, how about using Arrays.binarySearch(y,v) ? If the value v is present, you would get the index at which v is present in array y. Otherwise you would get negative value

edited Jun 17 '20 at 08:06

answered Jun 17 '20 at 07:03

Kavitha Karunakaran

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You are right. I corrected the answer. Thanks for pointing that out. – Kavitha Karunakaran Jun 17 '20 at 08:07

Why is java 8 unable to identify the integer array (y) passed to this method?

1 Answers1