declare an array with unknown size without using ArrayList

Is there a way to declare an array with an unknown length? My problem is to return an int[] of odd integers from a range of numbers. My current output is adding 0s to fill up the remaining space of the array.

public class Practice {

   static int[] oddNumbers(int minimum, int maximum) {

     int[] arr = new int[10];
     int x = 0;
     int count = 0;

     for(int i = minimum; i <= maximum; i++){
        if(i % 2 != 0){
           arr[x] = i;
           ++x;    
        }
     }
     return arr;
   }

   public static void main(String[] args) {
     int min = 3, max = 9;
     System.out.println(Arrays.toString(oddNumbers(min, max)));
   } 
}

My current output is [3,5,7,9,0,0,0,0,0,0] but I'd like it to be 3,5,7,9 It has to be an array and not an ArrayList. Is this possible? Or is there a complete different approach?