Learn how to Remedy Max-Min Arrays in Java

The problem

You’re given an array of distinctive components, and your activity is to rearrange the values in order that the primary max worth is adopted by the primary minimal, adopted by second max worth then second min worth, and so on.

For instance:

resolve([15,11,10,7,12]) = [15,7,12,10,11]

The primary max is 15 and the primary min is 7. The second max is 12 and the second min is 10 and so forth.

The answer in Java code

Possibility 1:

import java.util.*;

class Answer{
    public static int[] resolve (int[] arr){  
        Arrays.kind(arr);
        int[] solutionArray = new int[arr.length];
        
        for(int i = 0; i < arr.size; i++){
          solutionArray[i] = i % 2 == 0 ? arr[arr.length - i/2 - 1] : arr[i/2];
        }
        return solutionArray;
    }
}

Possibility 2:

import java.util.*;

class Answer{
    public static int[] resolve (int[] arr){  
        Listing<Integer> temp = new ArrayList<Integer>(); 
        Arrays.kind(arr);
        for (int i = 0, j = arr.size - 1; i <= j; ++i, --j) {
            if (i != j) temp.add(arr[j]);
            temp.add(arr[i]);
        }
        return temp.stream().mapToInt(i -> i).toArray(); 
    }
}

Possibility 3:

import java.util.stream.IntStream;

class Answer {

  public static int[] resolve(int[] arr) {
    int[] sorted = IntStream.of(arr).sorted().toArray();
    int[] end result = new int[arr.length];
    for (int i = 0, j = arr.size - 1, f = -1; i < arr.size;) {
      end result[i] = sorted[j];
      j = (j + arr.size + (f *= -1) * (++i)) % arr.size;
    }
    return end result;
  }

}

Check instances to validate our answer

import org.junit.Check;
import static org.junit.Assert.assertArrayEquals;
import org.junit.runners.JUnit4;

public class SolutionTest{    
    @Check
    public void basicTests(){     
        assertArrayEquals(new int[]{15,7,12,10,11},Answer.resolve(new int[]{15,11,10,7,12}));
        assertArrayEquals(new int[]{15,7,12,10,11},Answer.resolve(new int[]{15,11,10,7,12}));
        assertArrayEquals(new int[]{15,7,12,10,11},Answer.resolve(new int[]{15,11,10,7,12}));    
    }
}