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Start your free trialJay Bhatt
6,502 PointsHow do I account for the type cast to be String & be able to retrieve the title from the BlogPost object?
Please help I have been stuck on this and I am confused. I believe I understand typecasting. However the question wants to check whether obj has a instanceof String. However, if I do that with the if statement then I do not know how to retrieve the title since that is in the BlogPost object.
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) {
BlogPost another = (BlogPost) obj;
String result = "";
if (another instanceof BlogPost) {
result= ((BlogPost) another).getTitle();
}
return result;
}
}
1 Answer
Blake Larson
13,014 PointsThe title of BlogPost is also a String so you can keep the if statement, but add an else statement.
else { result = ((BlogPost) obj).getTitle(); // typecasting obj to a BlogPost instance and calling the getTitle() method to store in the result variable only if obj is not an instanceof String. }
Blake Larson
13,014 PointsBlake Larson
13,014 PointsWhen I say keep the if statement I mean from the first task. You can take the BlogPost another declaration off.