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Java Java Data Structures Getting There Type Casting

need some help to execute task 2?

Hi guys,

I dont understand exactly the question...could someone help?

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 String){
      result = (String) obj;
      return result;


2 Answers

Felix Sonnenholzer
Felix Sonnenholzer
14,654 Points


getTiltleFromObject(Object obj) can be called with any kind of Object.

So in Task 1 you checked if the obj was a String and if it was return it.

Now the second Task wants you to check if obj is a BlogPost and if it is to return the title.

It would look something like this

  public static String getTitleFromObject(Object obj) {
    // Fix this result variable to be the correct string.
    String result = "";
    if (obj instanceof String) {
      result = (String) obj;

    if (obj instanceof BlogPost) {
      result = ((BlogPost) obj).getTitle();
    return result;


if(obj instance of BlogPost) {
Blogpost post = (BlogPost) obj;
result = post.getTitle();
return result;