How do I prevent the modification of a private field in a class?

Question

Imagine that I have this class:

public class Test
{
  private String[] arr = new String[]{\"1\",\"2\"};    

  public String[] getArr() 
  {
    return arr;
         


        

Answer 1

Yes, you should return a a copy of the array:

 public String[] getArr()
 {
    return Arrays.copyOf(arr);
 }