Why cast a String to a String?

Question

An article on the Oracle Java Community sites gives as an example (for a JPA Converter, but that\'s not relevant, I guess) the following method:

public Boole         


        

Answer 1

Such cast is completely unnecessary. I can imagine that it was before

public Boolean convertToEntityAttribute(Object y) {
    String val = (String) y;
    ...
}

But later the argument type was changed to String and the author simply forgot to remove the cast.