I keep getting an error in my console....and can't figure out where I went wrong in the video

./com/teamtreehouse/Treet.java:13: error: incompatible types: Date cannot be converted to String mCreationDate = creationDate;
^
./com/teamtreehouse/Treet.java:25: error: incompatible types: String cannot be converted to Date return mCreationDate;
^
2 errors

Could someone help me out with what I did wrong...?

Treet.java package com.teamtreehouse;

import java.util.Date;

public class Treet { private String mAuthor; private String mDescription; private String mCreationDate;

public Treet(String author, String description, Date creationDate) { mAuthor = author; mDescription = description; mCreationDate = creationDate; }

public String getAuthor() { return mAuthor; }

public String getDescription() { return mDescription; }

public Date getCreationDate() { return mCreationDate; }

}

Example.java import java.util.Date;

import com.teamtreehouse.Treet;

public class Example {

public static void main(String[] args) { Treet treet = new Treet( "craigdennis", "Want to be famous? Simply tweet about Java and use" + "the hashtag #treet. I'll use your tweet in a new" + "@treehouse course about data structures.", new Date(1421849732000L) ); System.out.printf("This is a new Treet: %s %n", treet);

} }