Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

Java Java Data Structures Getting There Class Review

Alex Lowe
Alex Lowe
15,147 Points

Challenge Part 1

I'm getting these errors:

./com/example/BlogPost.java:3: error: class, interface, or enum expected package com.example; ^ JavaTester.java:39: error: cannot access BlogPost Field[] fields = BlogPost.class.getDeclaredFields(); ^ bad source file: ./com/example/BlogPost.java file does not contain class com.example.BlogPost Please remove or make sure it appears in the correct subdirectory of the sourcepath. 2 errors

What did I do wrong?

com/example/BlogPost.java
import java.util.Date;

package com.example;

public class BlogPost {
  private String mAuthor;
  private String mTitle;
  private String mCategory;
  private Date mCreationDate;
}

5 Answers

Craig Dennis
STAFF
Craig Dennis
Treehouse Teacher

Put the package declaration as the first line. Sorry 'bout that weird error. Will recreate and fix!

Akash yadav
Akash yadav
10,046 Points

Hey Craig, that weird error still exists! Please look forward to fix it.

That error is still existing.

Craig Dennis Please allow us to use "This" keyword rather than mVariableName.

Hi Alex,

Just to let you know, even if you put the package declaration first your code is still off.

Here's the link to the challenge:

http://teamtreehouse.com/library/java-data-structures/getting-there/class-review-2

The challenge question is:

Add declarations for private member fields for author, title, body, category, and creation date. The date should be of type java.util.Date (make sure you import it).

So there are 5 declarations needed:

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;
}

I'm stuck on part two of the challenge:

Challenge Task 2 of 3

Now add a constructor that accepts author, title, body, category and creation date. In your constructor, initialize the private variables you created in Step 1 using the arguments passed in.

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;
    mCategoy = category;
    mCreationDate = creationDate;
  }
}

It's giving me a syntax errors:

./com/example/BlogPost.java:13: error: class, interface, or enum expected public BlogPost(String author, String title, String body, String category, Date creationDate) { ^

./com/example/BlogPost.java:15: error: class, interface, or enum expected mTitle = title; ^

./com/example/BlogPost.java:16: error: class, interface, or enum expected mBody = body; ^

./com/example/BlogPost.java:17: error: class, interface, or enum expected mCategoy = category; ^

./com/example/BlogPost.java:18: error: class, interface, or enum expected mCreationDate = creationDate; ^

./com/example/BlogPost.java:19: error: class, interface, or enum expected } ^

6 errors

Also tried it like this:

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;
    mCategoy = category;
    mCreationDate = creationDate;
  }
Yorick ter Heide
Yorick ter Heide
1,744 Points

Put the constructor inside of the BlogPost Class.

For me this worked

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;

}
Jordan Scott
Jordan Scott
16,680 Points

Make sure to put you Constructor inside of the BlogPost Class

Gendarme Docena
Gendarme Docena
1,509 Points

Hi, for the first task, how come "private Date creationDate;" doesn't need a string? Is it because you are importing?

Hi Gendarme, Probably a bit late, but the 'Date' is the type declaration.