ArrayLists and Iterators

25. Must Override the Right Method

Answer:
There is an error. getName() is not a method of Object.

Must Override the Right Method

You might wonder why the method is not written this way:

  public boolean equals( Entry other )
  {
    return name.equals( other.getName() );
  }

This is a correct method, but it does not override the equals(Object) method. The types of the parameters do not match. To use indexOf(), you must override the equals(Object) method:

int indexOf(Object element)    //  Search for the first occurrence of 
                               //  element, testing for equality 
                               //  using the equals(Object) method 
                               //  of element.

Question 25:
Will the following work for equals(Object) ?
class Entry
{
  . . . . .

  public boolean equals( Object other )
  {
    return getName().equals( ((Entry)other).getName() );
  }

  . . . . . 
}