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Java Java Data Structures - Retired Getting There Type Casting

Pablo Rocha
Pablo Rocha
10,142 Points

Can't figure this one out...

I am getting the following compiler error. It tells me to use the getTitle method but when I do the compiler cannot find it. Seems fishy...

./TypeCastChecker.java:17: error: cannot find symbol return obj.getTitle(); ^ symbol: method getTitle() location: variable obj of type Object 1 error

TypeCastChecker.java
import com.example.BlogPost;

public class TypeCastChecker {
  /***************
  I have provided 2 hints for this challenge.
  Change `false` to `true` in one line below, then click the "Check work" button to see the hint.
  NOTE: You must set all the hints to false to complete the exercise.
  ****************/
  public static boolean HINT_1_ENABLED = false;
  public static boolean HINT_2_ENABLED = false;

  public static String getTitleFromObject(Object obj) {
    // Fix this return statement to be the correct string.
    if (obj instanceof String) {
      return (String) obj;
    } else {
      return obj.getTitle();
    }  
  }
}

1 Answer

Pablo Rocha
Pablo Rocha
10,142 Points

Figured it out. Needed to cast obj as a BlogPost then I was able to use the getTitle method. The code after the else statement needs to look like this:

      BlogPost blogPost = (BlogPost) obj;
      return blogPost.getTitle();