Console says "command not found"

package com.teamtreehouse;

import java.util.Date;

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

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

  // ACCESSOR METHODS

  public String getAuthor()
  {
    return mAuthor;
  }

  public String getDescription()
  {
    return mDescription;
  }

  public Date getCreationDate()
  {
    return mCreationDate;
  }
}

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

public class Example 
{
  public static void main(String[] args) 
  {
    Treet treet = new Treet(
    "Ryan",
      "I just earned the Delivering the MVP badge on @treehouse!" +
      "Last challenge was really fun! Idk why I suck when it comes to making small games",
      new Date(1456309920000L));
    System.out.printf("This is a new Treet:  %s %n", treet);
   }
}