I need help implementing the following Java code package mini2; import api.ITran

Question

I need help implementing the following Java code

package mini2;

import api.ITransform;

/**
* Transformation implementing a smoothing operation
* on cells of an array. The new value is the
* average of the values in a neighborhood
* around a given cell, rounded to the nearest
* integer. The size of the neighborhood is
* 2 * radius + 1, where the radius is a parameter
* provided to the constructor.
* The <code>isWrapped()</code> method always returns false.
*/
public class SmoothingTransform implements ITransform
{
private int radius;
  
public SmoothingTransform(int givenRadius)
{
radius = givenRadius;
}
  
@Override
public int apply(int[][] elements)
{
// TODO
return 0;
}

@Override
public int getRadius()
{
return radius;
}

@Override
public boolean isWrapped()
{
return false;
}

}

Explanation / Answer

public class SmoothingTransform implements ITransform
{
private int radius;
  
public SmoothingTransform(int givenRadius)
{
   radius = givenRadius;
}
  
@Override
public int apply(int[][] elements)
{
   int dim = 2 * radius + 1;
   if (elements.length != dim || elements[0].length != dim) {
       throw new IllegalArgumentException("Width or height of the array does "
               + "not equal 2 * radius + 1!");
   }
   int s = 0 - elements[getRadius()][getRadius()];
   for (int i = 0; i < elements.length; i++) {
       for (int j = 0; j < elements[0].length; j++) {
           s += elements[i][j];
       }
   }
   int avg = s / (dim * dim - 1);
return avg;
}

@Override
public int getRadius()
{
return radius;
}

@Override
public boolean isWrapped()
{
return false;
}

}

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