please help

Question about the task

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when the value not contained inside array...the index result will become negative ..that's means false...I have tried but the third task requirement still wrong...

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) { //write your code here int[] array = {9, 8, 7, 6, 5, 4, 3, 2, 1}; Arrays.sort(array) ; if(Arrays.binarySearch(array,5)>=0) { System.out.println("true"); } else { System.out.println("false");} } }

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hendra gunawan

Level 9 , tebing tinggi, Indonesia

14 January 2023, 02:57

thanks pat...this task is done....i made first mistake by initializing the array again in the main method....the second that i didn't cloning the array by copy it....i directly sort it....thanks for your advice ...

Pat

Level 19 , Czech Republic

13 January 2023, 20:24

I see. Read conditions carefully :), you cant change the positions of the elemenst in the original array. So you need to create copy of the array and then sort it. I leave it up to you, it is not difficult. One more comment - you dont need code in lines 21 - 25. The if (condition) itself returns true or false. Happy coding :)

hendra gunawan

Level 9 , tebing tinggi, Indonesia

13 January 2023, 17:27

i have tried but the result still the same

Pat

Level 19 , Czech Republic

13 January 2023, 09:49

Line 20, there should „element“ as the second argument but you put fixed number "5".