Why verification of my code is failed?

Question about the task

Is anyone there?

Java Syntax, Level 6, Lesson 8

Under discussion

Why did my code verification fail?

Implement the main(String[]) method, which displays true if the element is contained in the passed array, otherwise false.
The array variable should not change the position of its elements.

To search for an element in an array, you need a binary search. To do this, use the static Arrays.binarySearch(int[], int) method of the Arrays class.
In the first argument, pass a sorted array to be searched. The second parameter is the element to be searched for.
The Arrays.binarySearch(int[], int) method returns the index of the query element, if such an element exists in the array.

You can use the Arrays.sort(int[]) method to sort the array.
During testing, the values of the variables in the Solution class will be different.

Requirements:

In the main(String[]) method, do not change the position of the elements in the array.
When the main(String[]) method is called, display true if the value of the element variable is contained in the array.
When the main(String[]) method is called, display false if the passed element is not contained in the array.
In the main(String[]) method, use a call to the Arrays.binarySearch(int[], int) method.

package en.codegym.task.pro.task05.task0519; import java.util.Arrays; /* Is anyone there? */ public class Solution { public static int[] array = {9, 8, 7, 6, 5, 4, 3, 2, 1}; public static int element = 5; public static void main(String[] args) { int[] arr1 = Arrays.copyOf(array, array.length ); Arrays.sort(arr1); if (Arrays.binarySearch(array, element) <= 0) { System.out.println("false"); } else { System.out.println("true"); } } }

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Guadalupe Gagnon

Level 37 , Tampa, United States

24 January 2022, 14:52

Lisa is correct, however there is another problem as well: Binary search only works with a sorted array. The variable 'arr1' is sorted, however the variable 'array' (which is passed to the binarySearch() method) is not. This is why it is not passing. Be sure to pass a sorted array to the binarySearch() method.

Lisa

Level 41

23 January 2022, 17:44

if binarySearch returns 0 then this means the value you looked for is found at index 0. So you should print true in that case, too.