my code is not giving me min avg but just gives me 0.00 as answer i have tried using gpt but to no avail has it been fruitful

class Solution 
{
    public double minimumAverage(int[] nums) 
    {
        double[] averages = new double [nums.length];
        Arrays.sort(nums);
        int startpos = 0;
        int endpos = nums.length-1;
        while (startpos<=endpos) 
        {
            int[] subarray = Arrays.copyOfRange(nums,startpos,endpos + 1);
            int min = Arrays.stream(subarray).min().getAsInt();
            int max = Arrays.stream(subarray).max().getAsInt();
            double average = (double) (min+max)/2.0;
            averages[startpos] = average;
            startpos++;
            endpos--;
        }
        double avgMin = Arrays.stream(averages).min().getAsDouble();
        return avgMin;
    }
}

Note : The problem statement is LeetCode 3194;

my initial approach was basically sorting the array and then modifying start and end position ans respectively find avg min