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Start your free trialDamjan Vlaic
19,244 Points---JAVA---
someone pls help, i can't figure out what to do at this one
The method getTitleFromObject will be called and passed a String and/or a com.example.BlogPost. For this first task, return the object obj type casted as a String if it is in fact a String. I've included BlogPost.java for your reference only.
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 = "";
return result;
}
}
2 Answers
Steve Hunter
57,712 PointsHi there,
You need to take this question literally. return the object obj
cast as a String if it is a String.
Start with if it is a String - use if
and instanceof
to test this:
if(obj instanceof String){
// do something
}
Inside, we want to do the cast and return it. Now, you can either set the provided variable result
to the cast obj
and return
that after the if
, or you can just return it directly. I prefer the latter but I'll give you both:
String result = "";
if(obj instanceof String){
result = (String) obj;
}
return result;
// or
if(obj instanceof String){
return (String) obj;
}
In the next task, remember the start of the requirements defined here. There are only two types that the variable obj
can hold. It is either a String
or a BlogPost
. Don't cater for anything else.
Good luck!
Steve.
Damjan Vlaic
19,244 Pointsit worked out perfectly tnx for helping steve :)