How to change an integer array within a method

I am having an issue with a fill-in-the-code digital textbook problem. All the code is permanent and cannot be changed, so the problem can only be solved by using the area that states //Write code here.

The problem asks to implement the removeOdd method.

import java.util.Arrays;

public class RemoveTester
{
   public static int removeOdd(int[] values, int size) 
   { 
      //Write code here
   }
   public static void main(String[] args)
   {
      int[] a = { 22, 98, 95, 46, 31, 53, 82, 24, 11, 19 };
      int sizeBefore = 8;
      int sizeAfter = removeOdd(a, sizeBefore);
      System.out.print("a: [ ");
      for (int i = 0; i < sizeAfter; i++) 
      {
         System.out.print(a[i] + " ");
      }
      System.out.println("]");
      System.out.println("Expected: [ 22 98 46 82 24 ]");      

      int[] b = { 23, 97, 95, 45, 31, 53, 81, 24, 11, 19 };
      sizeBefore = 7;
      sizeAfter = removeOdd(b, sizeBefore);
      System.out.print("b: [ ");
      for (int i = 0; i < sizeAfter; i++) 
      {
         System.out.print(b[i] + " ");
      }
      System.out.println("]");
      System.out.println("Expected: [ ]");      
   }
}

The way I tried to implement removeOdd is by doing:

int evenCount = 0;
      
      for(int i = 0; i<size; i++){
         if(values[i]%2==0){
            evenCount++;
         }
      }
      int[] newValues = new int[evenCount];
      int newCount =0;
      for(int i = 0; i<evenCount; i++){
         if(values[i]%2==0){
            newValues[newCount] = values[i];
            newCount++;
         }
      }
      values = newValues;
      return evenCount;

When the program is compiled and ran, main prints the beginning of the original a or b arrays instead of only the even elements in a or b. I cannot find a way to alter the original arrays within the method removeOdd into the new arrays with only their even elements. I can’t think of any other way to do this either. Any help would be greatly appreciated!

>Solution :

Because Java is pass by value and not pass by reference, setting the value of the values argument will not change the value of the a variable.

What you have to do is remove all the odd elements from the array and shift the remaining even elements to the left so that the actual resultant form of a looks like this:

{22, 98, 46, 82, 24, 0, 0, 0, 0, 0}