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Java Java Data Structures Getting There Type Casting

Dorukhan Arat
Dorukhan Arat
31,325 Points
Posted by Dorukhan Arat
Dorukhan Arat
31,325 Points

I can't understand of second part of the exercise. Can you help me?

public static String getTitleFromObject(Object obj) {
    // Fix this result variable to be the correct string.
    String result = "";
    if(obj instanceof String ) {
      result = (String) obj;
    }
    return result;
  }

My first part of exercise looks like this.

1 Answer

Steve Hunter
Steve Hunter
57,712 Points

Hi there,

The obj is either a string or a BlogPost. So, you've dealt with the String eventuality so now you need to handle the BlogPost eventuality. Remember, the method returns a String.

So, in the else clause, cast obj to BlogPost. Then surround that all in brackets, and call getTitle() on that using dot notation.

Either assign that into result or just return it directly.

Let me know how you get on.

Steve.