Welcome to the Treehouse Community
Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.
Looking to learn something new?
Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.
Start your free trialMat T'Qartit
29,277 PointsBlogPost casting throws an error: Oops! It looks like Task1 is no longer passing..?
I don't see what I'm missing here.. I think that bp.getTitle() might have nothing but at least I was expecting an error message which would be helpful...?
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.
String result = "";
if(obj instanceof BlogPost) {
BlogPost bp = (BlogPost)obj;
result = bp.getTitle();
}
return result;
}
}
1 Answer
andren
28,558 PointsThe error message is actually correct, your code is fine as far as task 2 is concerned, but your code is no longer passing the first task. Which was to check if the Object
passed in was a String
and cast it as such if that was the case.
Currently your code only checks if obj
is a BlogPost
, if you also add a check that tests if it's a String
like this:
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.
String result = "";
if(obj instanceof String) { // Check if obj is String
result = (String)obj; // Cast it as such if that is the case
}
if(obj instanceof BlogPost) {
BlogPost bp = (BlogPost)obj;
result = bp.getTitle();
}
return result;
}
}
Then your code will pass.
Mat T'Qartit
29,277 PointsMat T'Qartit
29,277 Pointsoh yeah.. makes sense now... Thanks!