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Julius Dockwarder
15,041 PointsHelp!
I need to complete this exercise to complete the stage. But I can't figure out the solution. I think spent too much time on trying to figure it out, haha.
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 return statement to be the correct string.
if (obj instanceof String) {
return (String) obj;
}
else {
return (BlogPost) obj.getTitle();
}
}
}
Julius Dockwarder
15,041 PointsAwww... I forgot to attach the question:
The method getTitleFromObject will be called and passed a String and/or a com.example.BlogPost. Return the object type casted as a String if it is a String, and if it is the BlogPost type cast it, and return the results of the getTitle method.
I've included BlogPost.java for your reference only.
Emmet Lowry
10,196 Pointsheres the code 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.
String title = "bad type";
if(obj instanceof BlogPost) {
BlogPost post = (BlogPost) obj;
title = post.getTitle();
}
if(obj instanceof String) {
title = (String) obj;
}
return title;
} }
hope this works
Julius Dockwarder
15,041 PointsWorked great!
2 Answers
Jason Edstrom
8,976 PointsOn this line:
else {
return (BlogPost) obj.getTitle();
}
you are casting your string from obj.getTitle() as a BlogPost object instead of leaving it as a string.
Try using this:
else {
return ((BlogPost) obj).getTitle();
}
This way, you are casting the obj variable instead of the obj.getTitle result.
Steve Hunter
57,712 PointsYep - I agree with Jason above. This post covers off the details of this, rather difficult, task.
Steve.
Emmet Lowry
10,196 PointsEmmet Lowry
10,196 PointsWhat are you being asked to do.