Some weird error round here in Java

package com.teamtreehouse; import java.util.Date;

public class Treet {

private String mAauthor; private String mDescription; private Date mCreationDate;

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

@Override public String toString() { return "Treet: \"" + mDescription + "\" -@" + mAuthor; }

public String getAuthor() { return mAuthor; }

public String getDescription() { return mDescription; }

public Date getDate() { return mDate; }

public String[] getWords() { return mDescription.toLowerCase().split("[^\w#@']+"); }

}

// And second class is

import com.teamtreehouse.Treet; import java.util.Date;

public class Example {

public static void main (String[] args) { Treet treet = new Treet("Dino Sporer", "Want to be famous ? Simply tweet about Java and use the hashtag #treet. I'll use your treet in a new @treehouse course.", new Date(1421862896000L) ); System.out.printf("This is a new treet: %s %n", treet); System.out.printf("Words:"); for( String word : treet.getWords() ) { System.out.println(word); } } }

By the way, I got errors that said

./com/teamtreehouse/Treet.java:11: error: cannot find symbol
mAuthor = author;
^
symbol: variable mAuthor
location: class Treet
./com/teamtreehouse/Treet.java:18: error: cannot find symbol
return "Treet: \"" + mDescription + "\" -@" + mAuthor;
^
symbol: variable mAuthor
location: class Treet
./com/teamtreehouse/Treet.java:22: error: cannot find symbol
return mAuthor;
^
symbol: variable mAuthor
location: class Treet
./com/teamtreehouse/Treet.java:30: error: cannot find symbol
return mDate;
^
symbol: variable mDate
location: class Treet

HELP !