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7,468 PointsType Cast Challenge: If you cast obj as a BlogPost, how is it possible to return it when getTitle returns a String?
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 result variable to be the correct string. if (obj instanceof String){ String result = (String)obj; return result;} else{ if (obj instanceof BlogPost){ BlogPost result = (BlogPost)obj; return result; } else{ return null;} } } } }
Not sure what I need to be doing here. If the obj is a BlogPost how can it be returned in a method that returns a String? Thanks!
package com.example;
import java.util.Date;
public class BlogPost {
private String mAuthor;
private String mTitle;
private String mBody;
private String mCategory;
private Date mCreationDate;
public BlogPost(String author, String title, String body, String category, Date creationDate) {
mAuthor = author;
mTitle = title;
mBody = body;
mCategory = category;
mCreationDate = creationDate;
}
public String getAuthor() {
return mAuthor;
}
public String getTitle() {
return mTitle;
}
public String getBody() {
return mBody;
}
public String getCategory() {
return mCategory;
}
public Date getCreationDate() {
return mCreationDate;
}
}
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 result variable to be the correct string.
if (obj instanceof String){
String result = (String)obj;
return result;}
else{
if (obj instanceof BlogPost){
BlogPost result = (BlogPost)obj;
return result;
} else{
return null;}
}
}
}
}
1 Answer
![jcorum](https://uploads.teamtreehouse.com/production/profile-photos/4188262/micro_jgc_photo.jpg)
jcorum
71,830 Pointscam, it's not possible and you don't return a BlogPost.
Try this code:
public static String getTitleFromObject(Object obj) {
// Fix this result variable to be the correct string.
String result = "";
if (obj instanceof String) {
result = (String) obj;
} else if (obj instanceof BlogPost) {
BlogPost p = (BlogPost) obj;
result = p.getTitle();
}
return result;
}
If it is a BlogPost you need to first get its title, and then return that, which is a String.