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Courtney Knight
807 PointsGETTITLE METHOD. WHERE DID I GO WRONG?
I have tried to solve this chalenge for 2 days. I either get compiler errors or It says I have not solved it. Can anyone tell me where I am going wrong?
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;
import java.util.Date;
public class TypeCastChecker {
public static int compareDate;
private static Date mCreationDate;
/***************
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;
// String title = (String) obj;
public static String getTitleFromObject(Object obj) {
String title = "bad type";
if(obj instanceof BlogPost) {
BlogPost post = (BlogPost) obj;
title = post.getTitle();
}
if(obj instanceof String) {
title = (String) obj;
}
return title;
}
public int compareTo(Object obj){
BlogPost other = (BlogPost) obj;
if (this.equals(other)){
obj = (BlogPost)obj;
return 0;
}
int compareDate = mCreationDate.compareTo(other.mCreationDate);
return compareDate;
}
}
2 Answers
Michael Hess
24,512 PointsHi Courtney,
It looks like you're really close! The obj will be either a String or a BlogPost. The first case, of String, is taken care of by the if statement -- we also need to code for the second cases where obj is a BlogPost -- so we need to add an else-if statement.
Please see the following solution:
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 temp = (BlogPost) obj;
result = temp.getTitle();
}
return result;
}
If you would like me to explain anything any further I will be happy to do so!
Craig Dennis
Treehouse TeacherDid you get it Courtney? Your code looks good. What error are you getting?
Jonathan Seed
1,223 PointsJonathan Seed
1,223 PointsI am not familiar with this challenge so my answer may not be what you are looking for, but I do see a problem in your code! In your compareTo method, when comparing mCreationDate, you specify a private field of another object as a parameter. Specifically "other.mCreationDate". Instead, you would need to use the getter method, so your code would look like:
int compareDate = mCreationDate.compareTo(getCreationDate());