Could not find or load main class osx terminal

Question

None of the answers to this common question solve my problem.

I have a file directory tree like such

root
 |
 +--> com
        |
        +--> Game.java
        +--> Window.java

I compiled Game.java and Window.java sucesffully and the resulting tree is like so

root
 |
 +--> com
        |
        +--> Game.java
        +--> Game.class
        +--> Window.java
        +--> Window.class

I changed directory back to root and ran the following command from the osx terminal

java com.Game

and the I received the following error

Could not find or load main class

I'm not sure why, here are my classes

Game.java

package com;

import java.awt.*;

public class Game extends Canvas implements Runnable {

    private static final long mSerialVersionUid = -240870510533527854L;

    public static final int WIDTH = 640, HEIGHT = WIDTH / 12 * 9;

    public Game(){

        new Window(WIDTH, HEIGHT, "Let's build a game!", this);
    }

    public synchronized void start(){

    }

    @Override
    public void run(){

    }

    public static void main(String[] args){


    }
}

Window.java

package com;

import java.awt.Canvas;
import javax.swing.JFrame;
import java.awt.Dimension;

public class Window extends Canvas {

    public Window(int width, int height, String title, Game game){

        JFrame frame = new JFrame(title);

        frame.setPreferredSize(new Dimension(width, height));
        frame.setMaximumSize(new Dimension(width, height));
        frame.setMinimumSize(new Dimension(width, height));

        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setResizable(false);
        frame.setLocationRelativeTo(null);
        frame.add(game);
        frame.setVisible(true);
        game.start();
    }
}

Answer 1

This should work as expected — I ran your code on macOS 10.12.4 and it worked just fine ;)

You might have the CLASSPATH environment variable — without the current directory! — defined in your shell. If this is the case, try this instead:

java -cp . com.Game

By the way, to actually show the window you defined, create a Game object in your main method:

public static void main(String[] args) {
    new Game(); 
}