Cannot find the class from package

I tried alot of ways but I am sure I am missing something. I was following along with the video tutorials for packages and I am trying to implement the examples in local environment and compiling and running with command prompt on windows 10. (Please dont care about the names, I changed them just while practicing, I dont think that can be a reason for this.)

I am using NOTEPAD++ to practice the codes as I feel it makes me even better when it comes to practice debugging.

I created a package which is in the location: C:\Users\ruudr_000\Documents\ASSIGNMENTS\JAVA_Treehouse\Package_example\com\nikhil\Tweet.java

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

public class Tweet{

    private String mAuthor;
    private String mDescription;
    private Date mDate;

    public Tweet(String author, String desc, Date dDate){
        //constructor
        mAuthor = author;
        mDescription = desc;
        mDate = dDate;
    }

    public String getAuthor(){
        return mAuthor;
    }
    public String getDescription(){
        return mDescription;
    }
    public Date getDate(){
        return mDate;
    }
}

then I created the Example.java in location: C:\Users\ruudr_000\Documents\ASSIGNMENTS\JAVA_Treehouse\Package_example\Example.java

import com.nikhil.Tweet;
import java.util.Date;
public class Example{
    public static void main(String[] args){

        Tweet mTweet = new Tweet(
        "NikhilRai",
        "Description is a bit complicated as I do not have a twitter account",
        new Date(1449224173000L)//this is an epoch time converted for current date
        );
        System.out.printf("New tweet has been created : %s", mTweet);
    }
}

Please if you get any idea out of it, help me. Thank you.

[UPDATE]: I tried to run it in the workspace and it worked perfectly fine. But now my question is, how will I be able to run it in a local environment and what may be the issue that is causing the errors when kusing it from command line on my pc.? Any suggestions ?

[MOD: added ```java formatting around code blocks -cf]